This data package provides a dictionary of microsatellite locus primers used by the USGS Alaska Science Center, Molecular Ecology Laboratory (MEL). It is a look-up file of microsatellite locus names and citations to the original publication or source where additional information about the locus primers may be found.

DataID: 657 | doi:10.5066/P9GJEX8Y | Date Posted Online: 2024-04-11 | Last Updated:

This data package contains location data collected by the Argos System (CLS America, Inc.) from satellite transmitters attached to 116 Lesser Yellowlegs captured at multiple sites across their breeding and nonbreeding range in North America, 2018-2021. The raw data were processed to accomplish two goals: 1) flag implausible location and 2) remove locations within Joint Base Elmendorf-Richardson (JBER) and Eielson Air Force Base boundaries. Removal of locations in military land boundaries is required due to federal guidelines by Department of Defense (DoD) Public Affairs office and DoD Partners in Flight. Due to data sharing constraints of participating agencies, not all the locations (i.e., latitude and longitude) have been released. Two Comma Separate Value (CSV) tables are included in this data package: 1) the "lesserYellowlegs_USFWS_argosGPS_deploymentAttributes.csv" table contains one record for each transmitter deployment and 2) the "lesserYellowlegs_USFWS_argosGPS_processedData.csv" table contains one record for every Argos location estimate collected.

DataID: 656 | doi:10.5066/P9VYSWEH | Date Posted Online: 2024-04-10 | Last Updated:

This dataset contains a table with temperature (°C), raw electrical conductivity (μS/cm), and salinity (psu) measured in Beaufort Sea, Alaska, Lagoons during summers 2017-2019.

DataID: 655 | doi:10.5066/P9V8N8FE | Date Posted Online: 2024-04-02 | Last Updated: 2024-04-02 11:48:48

This dataset consists of fossil diatom counts from sediment cores collected in coastal environments on Montague Island, Alaska, and analyzed at Virginia Tech University.

DataID: 653 | doi:10.5066/P13UHFCE | Date Posted Online: 2024-03-22 | Last Updated:

These data describe observations of sea otter foraging behavior in Glacier Bay National Park and Preserve. Data consist of dive and surface times, success in prey retrieval, prey item, prey quantity, and size. Additionally, location of observations, and age class, sex, and pup status of the focal sea otter were also recorded.

DataID: 652 | doi:10.5066/P9T6UB5G | Date Posted Online: 2024-03-21 | Last Updated:

This dataset provides cycle threshold (Ct) values achieved during qPCR for 6 sex-linked genes, and two autosomal genes, for individuals from 60 species and across 13 orders of birds.

DataID: 651 | doi:10.5066/P9YVCG6U | Date Posted Online: 2024-03-07 | Last Updated:

The Alaska Forage Fish Database (AFFD) is a consolidation of survey data from multiple agencies that were sampled via fishing gear and predator diets. The spatial coverage includes the Gulf of Alaska, Bering Sea, Aleutian Islands, Chukchi Sea, and Beaufort Sea. Fish species within the database include Pacific sand lance, Pacific capelin, Pacific herring, juvenile walleye pollock and Pacific cod, myctophid, squid, and euphausiid. The data package is comprised of six tables: (1) catch_table includes counts, weight, and individual morphological characteristics (length, sex, age) of the sampled species; (2) event_table includes sampling time, location, and methods; (3) gear_table includes specifics about of the gear used for sampling when applicable; (4-5) two tables with taxonomic designations for forage species or predator species; and (6) a reference table that provides summary information about each contributed dataset.

DataID: 650 | doi:10.5066/P9WZQJ8N | Date Posted Online: 2024-03-06 | Last Updated:

This data package is comprised of one table with genetic data from Brant (Branta bernicla). Data include sampling location and allele sizes of 14 microsatellite loci.

DataID: 649 | doi:10.5066/P96G9LAJ | Date Posted Online: 2024-02-28 | Last Updated: 2024-02-28 13:02:22

This dataset consists of sample descriptions and radiocarbon age data from coastal environments on Montague Island, Alaska, analyzed at the National Ocean Sciences Accelerator Mass Spectrometry Facility.

DataID: 644 | doi:10.5066/P9OSRE0J | Date Posted Online: 2024-02-26 | Last Updated:

This data package includes 17,014 pairs of raster geotiffs. Each pair is made up of two geotiff rasters derived from historical observations from Landsat satellites (04-09) over the Yukon, Kuskokwim, and Tanana rivers in Alaska. One raster reports estimated mid-day water surface temperature (ST) in degrees Celsius (deg_Cc). The second raster reports the surface temperature quality assessment (sST_QA_c) and provides the ST product uncertainty (also in degrees). The period of observation is May through October for the years 1984-2022.

DataID: 645 | doi:10.5066/P9MCNPGK | Date Posted Online: 2024-02-26 | Last Updated: 2024-02-26 17:01:30

These data are in three tables each reporting estimated iron mineralization within stream reaches from three arctic rivers in northwestern Alaska on select days between July-August, 1985-2022. The relative magnitude of iron mineralization was measured using a remotely sensed iron index calculated from available Level 2, Collection 2, Tier 1 Landsat Surface Reflectance products derived by the USGS and accessed within Google Earth Engine (https://earthengine.google.com).

DataID: 642 | doi:10.5066/P9TP9TZH | Date Posted Online: 2024-02-22 | Last Updated:

This dataset contains taxonomic information, counts, and lengths of macroinvertebrates collected from rivers in northwest Alaska using drift and kick nets during summer and fall 2015-2019.

DataID: 643 | doi:10.5066/P90B3QO0 | Date Posted Online: 2024-02-22 | Last Updated: 2024-02-22 14:31:20

These data were part of a pilot tracking study of three adult female caribou from the Fortymile Herd in Alaska. The dataset is comprised of two comma separated values (.csv) files. Data includes: 1) processed (i.e., erroneous locations removed) GPS locations for caribou, received once per hour for 6 months (October 1998 to April 1999), and 2) spatial, temporal, and biological attributes of three female caribou tracked during the study.

Tagged Animal Movement Explorer (TAME) visualization for this data.

DataID: 638 | doi:10.5066/P13E7X8F | Date Posted Online: 2024-02-21 | Last Updated: 2024-02-21 16:45:01

This data package contains digital images, survey location logs and a summary tabulation from carcass survey conducted at walrus haulouts in Alaska. A summary of image collection times is provided as a tabular file.

DataID: 639 | doi:10.5066/P1QZNNUY | Date Posted Online: 2024-02-21 | Last Updated:

This metadata document describes the data contained in the "processedData" folder of this data package. This data package contains all data collected by the Argos System from 28 satellite transmitters attached to Long-billed Curlews at breeding sites in Oregon, Nevada, and Montana. The raw data were processed to accomplish two goals: flag implausible location estimates and decode raw sensor data. Three Comma Separate Value (CSV) tables are included in the "processedData" folder of this data package: 1) the "diag_filteredLocations" table contains one record for every Argos location estimate collected, accompanied by a binary flag that denotes an algorithm's plausibility check (based on distance, turning angle, and rate thresholds). Each record also includes a 'Tracking_Status' variable that denotes whether the location was collected from a live animal, a dead animal, or shed transmitter, 2) the "decodedSensor" table contains decoded sensor data such as the transmitter's temperature, battery voltage, and motion (activity), and 3) the "deploymentAttributes" table contains one record for each transmitter deployment in a CSV formatted table. The deployment attributes file contains information such as when the transmitter was attached to the animal, when tracking of a live animal ended, and a variety of variables describing the animal and transmitter. This table is identical to the "deploymentAttributes" table in the "rawData" folder of this data package.

DataID: 636 | doi:10.5066/P9Q85XOM | Date Posted Online: 2024-02-20 | Last Updated:

This metadata document describes the data contained in the "rawData" folder of this data package. This data package contains all data collected by the Argos System from 28 satellite transmitters attached to Long-billed Curlews at breeding sites in Oregon, Nevada, and Montana. Five data files are included in the "rawData" folder of this data package. Two data files (with identical content) contain the raw Argos DIAG (Diagnostic) data, one in the legacy verbose ASCII format and one in a tabular Comma Separate Value (CSV) format. Two other data files (with identical content) contain the raw Argos DS (Dispose) data, one in the legacy verbose ASCII format and one in a tabular CSV format. The fifth file, "deploymentAttributes", contains one record for each transmitter deployment in a CSV formatted table. The deployment attributes file contains information such as when the transmitter was attached to the animal, when tracking of a live animal ended, and a variety of variables describing the animal and transmitter. This table is identical to the "deploymentAttributes" table in the "processedData" folder of this data package.

DataID: 637 | doi:10.5066/P9Q85XOM | Date Posted Online: 2024-02-20 | Last Updated: 2024-02-20 14:32:22

These data include water chemistry from springs, streams, rivers, and shallow groundwater collected in the Arctic National Wildlife Refuge in northern Alaska. Chemical analyses were performed for hydrochemical parameters including field parameters, major ions, nutrients, metals, stable isotopes of water, and tritium, as well as for dissolved gases useful for determining the timescale over which the water was in the subsurface (i.e. age dating tracers), including noble gases and chlorofluorocarbons.

DataID: 635 | doi:10.5066/P95CXJIT | Date Posted Online: 2024-02-15 | Last Updated: 2024-02-15 14:31:22

These data consist of the fatty acid composition (percent of mass) of adipose tissue samples from polar bears in Alaska's southern Beaufort Sea. Fat biopsy samples were collected from polar bears that were either captured or biopsy darted along the north coast of Alaska or on offshore ice during March, April, or May from 2004 to 2016. The data also include an identification code unique to an individual bear, sex, age class, and the date of sample collection.

DataID: 631 | doi:10.5066/P9NIMT90 | Date Posted Online: 2024-01-26 | Last Updated:

These data are estimates of den emergence date, den site departure dates, and duration at den sites as well as post-emergence observations for female polar bears sampled in the southern Beaufort Sea subpopulation 1985-2016 and the Chukchi Sea subpopulation 2008-2017. The data were used to better understand the importance of time spent at the den site post-emergence. Emergence dates and departure dates were determined using collar temperature sensor data.

DataID: 630 | doi:10.5066/F7G73BTD | Date Posted Online: 2024-01-22 | Last Updated: 2024-01-22 09:08:59

This dataset contains morphological measures of Pacific walruses sampled in the Chukchi and Bering Seas between 1972 and 1991. From 1972 through 1991 the Soviet Union employed industrial methods to harvest and process Pacific walruses to enhance the Russian Far East economy. Under the oversight of the Pacific branch of the Soviet All-Union Scientific Investigational Institute of Marine Fisheries and Oceanography (VNIRO), offshore harvesting crews worked from specialized marine mammal hunting ships (ZRS) throughout the spring, summer, and early autumn in the marginal sea ice habitats of the Bering and Chukchi Seas. They launched small (~7 m) wooden boats to approach walruses resting on ice pans, which were dispatched with standard hunting rifles. Harvested walruses were hauled back to the ZRS vessel for processing. Soviet cruises that contributed data to this dataset include ZRS Zagoriany (1976 spring), Surveyor (1978 spring), ZRS Zubarevo (1978), ZRS Zagorskii (1980 March 6 - April 23), ZRS Zvyagino (1981 February - March), KS Entuziast (1982 July 25 - August 23), ZRS Zakharova (1984 autumn, 1985 March 15 - April 26 and 1987 autumn), ZRS Zaslonovo (1991 March 28 - May 21).

Beginning in 1981 harvesting extended into United States waters of the Pacific Arctic with permission of the National Oceanic and Atmospheric Administration (NOAA) under the auspices of the 1972 Area V bilateral agreement in the area of the environment. This bilateral agreement enabled direct liaison between Soviet and U.S. biologists who then arranged to collaborate collecting data from these offshore harvest efforts that may be used to understand basic walrus biology and monitor changes in their condition and reproductive success. Throughout the harvesting efforts, trained biologists inspected, measured, and weighed walrus specimens that had been landed onto the processing vessel. Harvest locations, observations, and measurements were recorded into numbered journals and standardized datasheets. This dataset contains these data. Originally these data were managed by VNIRO, however, to promote data curation during the post-Soviet period VNIRO formed an agreement with USGS Alaska Science Center (which at the time was the U.S. National Biological Survey) to maintain a copy of these data and provide access to them for studies vetted by representatives of the original data collection agency. This current database is published with permission of the original data curator, Dr. Yuri Bukhtiyarov.

DataID: 626 | doi:10.5066/P9D1IKH9 | Date Posted Online: 2024-01-11 | Last Updated: 2024-01-16 11:21:36

This dataset consists of one table with a record (row) for each goose location and columns containing location information and covariates. The dataset was used in an analysis of altitude selection and flight propensity in an accompanying paper (Weiser et al. 2024) and is being provided here to allow replication of that analysis. Goose locations (latitude, longitude, and altitude) were collected with GPS tags and represent three subspecies: Pacific Greater White-fronted Goose, Tule Greater White-fronted Goose, and Lesser Snow Goose. Covariates include weather information from ERA5 (Hersbach et al. 2022). In addition to the "used" locations (altitudes at which birds were recorded), the dataset also includes "available" locations: altitude bands that the bird could have reached by that time, given its previous altitude, elapsed time, and maximum climb rate.

DataID: 627 | doi:10.5066/P9VUN0Q9 | Date Posted Online: 2024-01-09 | Last Updated:

This package contains information collected during avian and habitat survey data at five national parks/monuments: Cape Krusenstern National Monument, Gates of the Arctic National Park and Preserve, Kobuk Valley National Park, Noatak National Preserve, and Bering Land Bridge National Preserve. The objectives of the surveys were to document the occurrence of 90 percent of the bird species likely to occur in montane habitats and determine the distribution and abundance of species of special concern.

DataID: 621 | doi:10.5066/P9V4IKNZ | Date Posted Online: 2024-01-03 | Last Updated: 2024-01-03 13:21:09

These data comprise 505 unique geospatial raster datasets which describe persistent river ice (aufeis) occurrence within floodplains of select rivers and creeks in the 1002 Area of the Arctic National Wildlife Refuge in northern Alaska. Each raster is derived from a historical observation made by one of five Landsat satellites. Surface reflectance in the green and shortwave infrared wavelengths are used to classify the aufeis occurrence within individual pixels. Pixel values of "1" correspond to aufeis presence while "0" corresponds to its absence. Rasters are generated from cloud and snow-filtered images captured between May and September for the years 1985-2022.

DataID: 617 | doi:10.5066/F7KK98VP | Date Posted Online: 2023-12-20 | Last Updated: 2023-12-20 14:21:44

These data are estimates of the proportional contributions of bearded seal, beluga whale, bowhead whale, and ringed seal to the diets of southern Beaufort Sea polar bears. Fat biopsy samples were collected from polar bears captured or biopsy darted along the north coast of Alaska or on offshore ice during March, April, and May from 2004 to 2016. Fatty acid data of the above four prey species were compiled from online sources (Bromaghin et al. 2015ab, USGS 2021) and one private source that has been used in several polar bear diet studies (Thiemann et al. 2008). Diet composition was estimated from polar bear adipose tissue fatty acid composition data (USGS 2023) using three methods: the original quantitative fatty acid signature analysis model (Iverson et al. 2004, McKinney et al. 2017) and two alternative methods based on recommendations by Bromaghin et al. (2015c, 2016ab, 2017).

DataID: 618 | doi:10.5066/P976BY21 | Date Posted Online: 2023-12-20 | Last Updated: 2023-12-20 14:21:45

Over three years, we captured 20 polar bears (adult and subadult) near Churchill Manitoba, during the months of August and September (2019 n=2; 2021 n=9; 2022 n=9). Bears were fitted with collars which recorded video, GPS location, and tri-axial acceleration. Additionally, we measured field metabolic rate and changes in body composition. Each bear was captured two times approximately 21 days apart. For technical and logistic reasons, not all data were collected for each bear. This data package is in four tables. Each table has a bear id column connecting data from the four datasets.

DataID: 612 | doi:10.5066/P9A7ITFH | Date Posted Online: 2023-12-08 | Last Updated: 2023-12-20 14:21:37

These data include water chemistry from headwater streams to large rivers that have recently turned orange and reference rivers that have not. These samples were collected in two national parks in Arctic Alaska: Kobuk Valley National Park, and Noatak National Preserve.

DataID: 611 | doi:10.5066/P9DZSQ43 | Date Posted Online: 2023-12-04 | Last Updated: 2023-12-04 15:23:22

This data package documents selected special conditions affecting the magnitude of peak flows at streamgages in Alaska. The data consist of a table of special conditions for selected peak flows and a table of data sources. This dataset resolves ambiguity introduced by historical variations in USGS National Water Information System (NWIS; https://doi.org/10.5066/F7P55KJN) peak-flow code assignment practices or inherent in defining multiple possible conditions for a single code. For peak flows assigned a code 3 or 9 in the NWIS peak-flow database, the special conditions forming the basis for code assignment were (1) snowmelt or (2) a sudden release of water. Sudden releases of water included glacier dammed lake outburst, glacier and debris dammed lake outburst, sediment dammed lake outburst, mass failure/lake outburst, landslide debris dam breakup, beaver dam breakup, natural flow diversion, or subsidence from detonation subcategories. Data sources used to verify the basis for the codes included reports, online data, and USGS streamgaging notes.

DataID: 610 | doi:10.5066/P9N798Z3 | Date Posted Online: 2023-11-27 | Last Updated: 2024-01-25 08:58:27

This metadata document describes the data contained in the "rawData" folder of this data package. This data package contains all data collected by the Argos System from 63 satellite transmitters attached to Bar-tailed Godwits on their breeding range in arctic and western Alaska, 2005-2010. Five data files are included in the "rawData" folder of this data package. Two data files (with identical content) contain the raw Argos DIAG (Diagnostic) data, one in the legacy verbose ASCII format and one in a tabular Comma Separate Value (CSV) format. Two other data files (with identical content) contain the raw Argos DS (Dispose) data, one in the legacy verbose ASCII format and one in a tabular CSV format. The fifth file, "deploymentAttributes", contains one record for each transmitter deployment in a CSV formatted table. The deployment attributes file contains information such as when the transmitter was attached to the animal, when tracking of a live animal ended, and a variety of variables describing the animal and transmitter. This table is identical to the "deploymentAttributes" table in the "processedData" folder of this data package.

DataID: 608 | doi:10.5066/P9A9BYQW | Date Posted Online: 2023-11-17 | Last Updated: 2023-11-17 16:24:37

This metadata document describes the data contained in the "processedData" folder of this data package. This data package contains all data collected by the Argos System from 63 satellite transmitters attached to Bar-tailed Godwits on their breeding range in arctic and western Alaska, 2005-2010. The raw data were processed to accomplish two goals: flag implausible location estimates and decode raw sensor data. Three Comma Separate Value (CSV) tables are included in the "processedData" folder of this data package: 1) the "diag_filteredLocations" table contains one record for every Argos location estimate collected, accompanied by a binary flag that denotes an algorithm's plausibility check (based on distance, turning angle, and rate thresholds). Each record also includes a 'Tracking_Status' variable that denotes whether the location was collected from a live animal, a dead animal, or shed transmitter, 2) the "decodedSensor" table contains decoded sensor data such as the transmitter's temperature, battery voltage, and motion (activity), and 3) the "deploymentAttributes" table contains one record for each transmitter deployment in a CSV formatted table. The deployment attributes file contains information such as when the transmitter was attached to the animal, when tracking of a live animal ended, and a variety of variables describing the animal and transmitter. This table is identical to the "deploymentAttributes" table in the "rawData" folder of this data package.

DataID: 609 | doi:10.5066/P9A9BYQW | Date Posted Online: 2023-11-17 | Last Updated: 2023-11-17 16:39:26

This data set describes three independent viral introductions of Highly pathogenic H5N1 avian influenza viruses into Alaska.

DataID: 606 | doi:10.5066/P9LPH8ZQ | Date Posted Online: 2023-11-15 | Last Updated: 2023-11-15 11:46:26

This dataset consists of sample details and radiocarbon age data of tree-ring samples collected near Girdwood, Alaska, and analyzed at the National Ocean Sciences Accelerator Mass Spectrometry Facility.

DataID: 607 | doi:10.5066/P9F4D7DP | Date Posted Online: 2023-11-15 | Last Updated:

This set of data files contains analyses of samples representing Triassic units (Shublik and Ivishak Formations and Karen Creek Sandstone) in Alaska. The samples were collected from 20 outcrop localities in northeastern Alaska. The data set includes total organic carbon (TOC) and geochemical data from inductively coupled plasma-optical emission spectroscopy-mass spectroscopy (ICP-OES-MS) and portable X-ray fluorescence (p-XRF). The data presented here are described and interpreted in a paper titled "Facies Variation within Outcrops of the Triassic Shublik Formation, Northeastern Alaska".

DataID: 605 | doi:10.5066/P9FAGE8O | Date Posted Online: 2023-11-08 | Last Updated: 2023-11-08 10:21:47

This dataset is one table with results of tests to determine exposure of Chukchi Sea polar bears to a suite of pathogens. Results are serological tests for antibodies and tests of fecal samples for presence of parasites. Serologic assays were conducted for Toxoplasma gondii, Neospora caninum, Francisella tularensis, Coxiella burnetii, Leptospira spp., Brucella canis, Brucella abortus/suis, and canine distemper virus. Parasitology analyses were conducted for presence of Giardia cysts and Cryptospiridium oocysts in fecal samples. Polar bears were sampled on sea ice in the Chukchi Sea between mid-March and early May 1987-1994 and 2008-2017. The dataset includes relevant information about the bears that were captured including the latitude and longitude of their capture location, capture date, age and sex,and the age and number of cubs accompanying an adult female.

DataID: 604 | doi:10.5066/P9YF0CQT | Date Posted Online: 2023-10-25 | Last Updated: 2023-11-08 10:14:42

This data package is comprised of three tables with data from wintering Harlequin Ducks (Histrionicus histrionicus) from Alaska, British Columbia, Washington, Maine, Greenland, and Iceland. The first table contains available allele sizes for 7 microsatellite loci (Sfiµ1, Sfiµ4, Sfiµ9, Sfiµ10, Bcaµ10, Hhiµ2, Hhiµ5) and mtDNA control region haplotypes. The second table contains the mtDNA control region sequences used to assign haplotypes. The third table provides the geographic locations of sampling sites.

DataID: 603 | doi:10.5066/P9V2GYIU | Date Posted Online: 2023-10-24 | Last Updated: 2023-10-30 10:13:51

This metadata document describes the data contained in the "processedData" folder of this data package. This data package contains all data collected from 130 Argos and Argos-linked GPS satellite transmitters attached to Buff-breasted Sandpipers at breeding sites in Alaska, migratory stopovers in Texas, and wintering areas in Brazil, Argentina, and Uruguay, 2016-2018. The 130 deployed tags were comprised of 22 Argos Doppler PTTs (2 gram PTTs built by Microwave Telemetry) and 108 Argos-linked GPS PTTs (2 gram PinPoint tags built by Lotek). However, 14 Pinpoints never reported data, so they only appear in the deployment data records and not the location data files. One of the 94 functional PinPoint tags never reported GPS data, and 15 of the Pinpoint tags never obtained an Argos Doppler-derived location estimate. The raw (original) data from these tags were processed to accomplish three goals: 1) extract encoded GPS locations; 2) flag implausible locations; and 3) decode raw sensor data. Results of this data processing are presented in three Comma Separate Value (CSV) tables found in the "processedData" folder of this data package: 1) the "GPS_filteredLocations" table contains one record for every GPS location which passed a manual plausibility assessment based on considerations of movement rate, seasonal range, and habitat; 2) the "diag_filteredLocations" table contains one record for every Argos location estimate collected, accompanied by a binary flag that denotes an algorithm's plausibility check (based on distance, turning angle, and rate thresholds). Each record in both the GPS and Argos filtered-location tables also includes a 'Tracking_Status' variable that denotes whether the location was collected from a live animal, a dead animal, or shed transmitter, 3) the "decodedSensor" table contains decoded sensor data (for only the Argos Doppler tags) of the transmitter's temperature and battery voltage. A fourth CSV table named "deploymentAttributes" is also included. It contains one record for each transmitter deployment, and contains information such as when the transmitter was attached to the animal, when tracking of a live animal ended, and a variety of variables describing the animal and transmitter. This table is identical to the "deploymentAttributes" table in the "rawData" folder of this data package.

DataID: 600 | doi:10.5066/P9TYMUID | Date Posted Online: 2023-10-17 | Last Updated: 2023-10-25 12:44:44

This metadata document describes the data contained in the "rawData" folder of this data package. This data package contains all data collected from 130 Argos and Argos-linked GPS satellite transmitters attached to Buff-breasted Sandpipers at breeding sites in Alaska, migratory stopovers in Texas, and wintering areas in Brazil, Argentina, and Uruguay, 2016-2018. The 130 deployed tags were comprised of 22 Argos Doppler PTTs (2 gram PTTs built by Microwave Telemetry) and 108 Argos-linked GPS PTTs (2 gram PinPoint tags built by Lotek). However, 14 Pinpoints never reported data, so they only appear in the deployment data records and not the location data files. One of the 94 functional PinPoint tags never reported GPS data, and 15 of the Pinpoint tags never obtained an Argos Doppler-derived location estimate. A majority of the transmitters carried GPS receivers, so GPS tracking data represent the backbone of this data release; the remaining tags were traditional Argos transmitters. Please note that GPS data are only distributed in the "processedData" folder of this data package. All data from both types of tags were communicated through the Argos System so all tags were Argos-certified Platform Transmitting Terminals (PTTs) and all have a time series of Argos (Doppler) locations. The Argos-linked GPS tags additionally have a times series of GPS locations that were communicated through the Argos System as data collections. Five data files are included in the "rawData" folder of this data package. Two data files (with identical content) contain the raw Argos DIAG (Diagnostic) data, one in the legacy verbose ASCII format and one in a tabular Comma Separate Value (CSV) format. Two other data files (with identical content) contain the raw Argos DS (Dispose) data, one in the legacy verbose ASCII format and one in a tabular CSV format. The fifth file, "deploymentAttributes", contains one record for each transmitter deployment in a CSV formatted table. The deployment attributes file contains information such as when the transmitter was attached to the animal, when tracking of a live animal ended, and a variety of variables describing the animal and transmitter. This table is identical to the "deploymentAttributes" table in the "processedData" folder of this data package.

DataID: 601 | doi:10.5066/P9TYMUID | Date Posted Online: 2023-10-17 | Last Updated: 2023-10-25 12:44:40

This dataset consists of two tables with the results from two manipulative thermal experiments with juvenile coho salmon (May 2021) and juvenile Chinook salmon (May 2020) and include 1) gene transcription results and heat shock protein 70 abundance in coho salmon and Chinook salmon and 2) water temperatures to which fish were exposed during the experiment.

DataID: 599 | doi:10.5066/P9GPHHTC | Date Posted Online: 2023-09-28 | Last Updated:

This dataset contains length, weight, energy density, and isotope values of fish collected in northwest Alaskan rivers during summer and fall 2015-2019.

DataID: 598 | doi:10.5066/P9WGRX66 | Date Posted Online: 2023-09-26 | Last Updated:

This dataset contains hourly vehicle traffic counts in the Kuparuk and Milne Point oil fields on the North Slope of Alaska during summers 2019 and 2020. The oil field roads were generally closed to the public during the study period, so traffic was primarily associated with industrial activities. Data were collected using TRAFx vehicle traffic counters (TRAFx Research Ltd, Canmore, Alberta, Canada) that were placed at random locations throughout the Kuparuk and Milne Point road systems representing varying traffic conditions. We deployed 25 counters from 12–13 June to 11 August in 2019, and 24 counters from 8–9 June to 19 August in 2020. The locations of the counters were changed between 2019 and 2020 to increase the spatial coverage of data collection across the road system (Severson et al 2023). The counters were programmed to record the number of vehicles each hour based on changes in the nearby electro-magnetic field. We provide the hourly traffic counts, along with information about the counter settings, locations, deployment and collection dates, and additional comments.

DataID: 597 | doi:10.5066/P9HXW3N5 | Date Posted Online: 2023-09-25 | Last Updated:

This data package contains six tables: 1) characteristics of bird survey sites, 2) vegetation classification at survey sites, 3) detections of all birds at survey sites, 4) behaviors of all birds at survey sites, 5) bird taxonomy and indication of conservation status, and 6) habitat information pertaining to survey site photographs. The objectives of the survey were to 1) use targeted field investigations to document as many bird species as possible that occur within Aniakchak during the breeding season, and 2) describe the distribution, habitat associations, and relative numbers of bird species occurring within Aniakchak during the breeding season.

This data package contains geospatial layers used for selecting bird survey locations in Aniakchak National Monument and Preserve. 1)"ANIA_original_sample_sitesAlb83" represents the nine 10-km X 10-km sample plots selected for the Aniakchak bird surveys. 2)"ANIA_sample_location_waypointsAlb83" is a summary of the 136 locations at which Aniakchak bird surveys were conducted. 3)"ANIA_sampled_plotsAlb83" represents the nine 10-km X 10-km sample plots inventoried during the Aniakchak bird surveys. 4)"ANIA_savage_site_checksAlb83" represents unique sites within Aniakchak that were identified for site visits based on expert opinion.

DataID: 596 | doi:10.5066/P9KW50B3 | Date Posted Online: 2023-09-15 | Last Updated: 2023-09-15 10:00:51

No data are available from this page. Geospatial outlines and herd size estimates of Chukchi Sea autumn walrus haulouts, interpreted from Satellite imagery, have been combined into an updated U.S. Geological Survey data release.

Users should access the most updated and complete results from the USGS Alaska Science Center: https://doi.org/10.5066/P9CSM0KN

DataID: 593 | doi:10.5066/P97NFTDU | Date Posted Online: 2023-09-14 | Last Updated: 2024-05-15 15:37:11

These were data collected from polar bears from the southern Beaufort Sea during the spring between 2004 and 2016. Data include individual bear identification, age and sex class, capture date, capture year, open water season lengths, melt season length, and diet composition (expressed as a percentage of prey species). These data were used to determine whether polar bear diets have recently changed or remained stable over time.

DataID: 592 | doi:10.5066/P9JXZSUS | Date Posted Online: 2023-09-11 | Last Updated:

This dataset is two tables with data collected and derived from polar bears sampled in Alaska's southern Beaufort Sea during 2008-2019. Collected data includes demographic and morphometric information and derived data includes mercury concentrations in hair samples. Ancillary data includes gut microbiome abundances, diversity indices, calculated body condition, and the proportions of prey species detected in individual bear diets. These data were used to determine whether gut microbiota community richness and diversity were associated with diet-acquired mercury.

DataID: 591 | doi:10.5066/P92XAUH9 | Date Posted Online: 2023-09-05 | Last Updated:

This dataset consists of three tables relating to (1) detections of adult McKay's Buntings from line transect with distance estimation surveys on St. Matthew and Hall islands in Alaska between May 30 and June 29, 2003 and June 6 and 11, 2018, (2) environmental covariates associated with detections of adult McKay's Buntings in less than or equal to 250-m long contiguous transect segments, and (3) environmental covariates used to predict McKay's Bunting population size in less than or equal to 300 x 300-m pixels across the study area in each year, and to estimate population change between years.

DataID: 589 | doi:10.5066/P94JY2KH | Date Posted Online: 2023-08-30 | Last Updated:

This dataset consists of one table with sample collection locations and results of screening resident wildlife for Cryptosporidium and Giardia in the Alaskan Arctic, 2012-2017. We analyzed feces collected from polar bear, Pacific walrus, Arctic fox, and caribou with MERIFLUOR direct immunofluorescence assay to determine the presence of Cryptosporidium oocysts and Giardia cysts.

DataID: 590 | doi:10.5066/F7V122ZV | Date Posted Online: 2023-08-30 | Last Updated: 2024-09-03 09:22:57

Two tables of data are included in this data release. The first table provides screening results for 32 previously described and/or published microsatellites and 1 sexing marker, primer redesigns for use in Mexican Spotted Owls in this data release, and size of markers in Mexican Spotted Owls. The second table provides microsatellite and sexing marker results for 10 tissue and 98 feather samples for 11 microsatellite markers identified as variable in initial marker screenings.

DataID: 587 | doi:10.5066/P9KEWTRX | Date Posted Online: 2023-08-16 | Last Updated: 2023-08-16 14:48:16

This data set contains 99 electron microprobe analyses of cassiterite, chalcopyrite, galena, pyrite, sphalerite, and tetrahedrite from seven Sheep Creek drill core samples and one outcrop; and a table that describes the textures, mineralogy, and rock type of 15 thin sections of Sheep Creek drill core and observations from our study and from drill core logging by industry. These data were used to compare this prospect with others in the Bonnifield district. The data set also contains tables of sensitive high-resolution ion microprobe (SHRIMP) U-Pb zircon dates, zircon characteristics (crystal shape, external morphology, internal features, color, aspect ratio, and cathodoluminescence zoning), and 139 U-Th-Pb analyses of the zircons from 11 metaigneous rocks collected during 1997-2005 fieldwork in the Bonnifield mining district, Alaska Range. Our zircon geochronology indicates that volcanogenic massive sulfide deposits in the Bonnifield district are hosted in felsic metavolcanic rocks that yield ages based on weighted averages of 206 Pb/238U ages (± 2-sigma errors) of 362 ± 2 Ma. These rocks overlie the stratigraphic sequence at the Sheep Creek prospect, where metaigneous rocks give ages of 372 ± 4 Ma to 366 ± 4 Ma.

DataID: 585 | doi:10.5066/P9654N1C | Date Posted Online: 2023-08-15 | Last Updated: 2023-08-15 16:20:07

This data release includes three tables containing cosmogenic beryllium-10 and aluminum-26 concentrations and related data from samples collected at four sites in central Alaska in 2020, prepared in 2022 at the University of Vermont (UVM), and measured at the Purdue Rare Isotope Measurement lab (PRIME) in 2022. The file "geology_siteLocations_centralAK_bender.csv" contains site locations in the NAD83 reference frame, and burial ages computed from raw data contained in the other files. All files are linked by the site_id_short field.

DataID: 586 | doi:10.5066/P9HX0MJ1 | Date Posted Online: 2023-08-15 | Last Updated: 2023-08-15 16:19:50

This data set contains fission track data and associated ages of apatite from igneous and sedimentary rocks, U-Pb isotopic data and associated ages of zircon from a subset of the igneous rock samples, and U-Pb isotopic data and associated ages of detrital zircon from a subset of the sedimentary rock samples. All samples were collected from the region surrounding Lake Clark and Lake Iliamna in southwestern Alaska. All samples were collected as part of geological mapping and research conducted in 2008 and funded by the U.S. Geological Survey Mineral Resources External Research Program. Apatite and zircon grains were separated and analyzed by Apatite to Zircon, Inc. (A2Z). All analyses were conducted in 2009 using standard fission track dating techniques and laser-ablation-inductively-coupled-plasma-mass spectrometry (LA-ICP-MS) techniques.

DataID: 583 | doi:10.5066/P9HP1RIU | Date Posted Online: 2023-08-08 | Last Updated:

This data release contains three tables of U-Pb zircon isotopic data generated from analyses of 40 metaplutonic and metavolcanic rocks from the Yukon-Tanana Upland of western Yukon and east-central Alaska and one sample from southern Yukon. One of the tables also reports U-Pb data for two titanite analyses for one of the samples. U-Pb zircon ages from analyzed samples range from 363.5 ± 3.8 to 253.1 ± 0.7 Ma and were collected from parautochthonous North America and the allochthonous Yukon-Tanana terrane. U-Pb zircon data include 216 individual analyses by ID-TIMS and 35 individual analyses of two samples by LA-ICP-MS. ID-TIMS analyses of titanite give concordant 206Pb-238U ages of 333 and 338 Ma. Two U-Pb tables report the isotopic composition of uranium (U) and thorium (Pb) measured in each grain, ratios of isotopes of lead and uranium isotopes, and the age of each grain. A third table reports interpreted U-Pb ages, sample locations, tectonic assemblage or unit, lithology, analysis method, laboratory used, and basis for age assignment. The data release also contains two tables of whole-rock major- and trace-element geochemical data for metaigneous rocks from the Yukon-Tanana Upland in east-central Alaska for augen gneiss (15 samples) and amphibolite (30 samples).

DataID: 584 | doi:10.5066/P93ZWGA1 | Date Posted Online: 2023-08-08 | Last Updated: 2023-08-08 07:58:58

This dataset includes tables related to macroinvertebrate collections in streams and springs of the 1002 region of the Arctic National Wildlife Refuge in northeastern Alaska. Macroinvertebrates were collected using kicknets and driftnets in April and August with the goal of comparing populations to those sampled from the same water bodies by the USGS in the 1970s.

DataID: 581 | doi:10.5066/F7X34VHM | Date Posted Online: 2023-07-19 | Last Updated: 2023-07-24 14:03:17

This dataset contains observations of snow and firn density and stratigraphy from Site EC on Wolverine Glacier. Site EC is located in the accumulation zone on the northwest flank of the upper glacier at 1350m. Cores were recovered using a FELICS corer to approximately 25m depth at the end of the accumulation season and the end of ablation season starting in 2016. Additional cores were drilled throughout the ablation seasons of 2016 and 2017. The cores were processed in the field. The dataset includes depth-density profiles, ice-lens stratigraphy, and annual-layer depths. Density was calculated by measuring the mass and length of each core section (the corer retrieves cores with uniform diameter, which was measured on randomly selected core sections). Ice lenses were identified by visual inspection. Annual layer depths were determined by identifying dark layers in the core, which are interpreted to be the end-of-melt-season surfaces.

DataID: 582 | doi:10.5066/F7610XHQ | Date Posted Online: 2023-07-19 | Last Updated: 2023-07-24 14:23:25

This dataset is one table with data collected and derived from polar bears sampled in Alaska's southern Beaufort Sea during 1983-2018. Collected data includes demographic and morphometric information. Derived data includes blood-based analyte values determined from whole blood and serum samples. Serum samples were analyzed on an Abaxis VS2 Biochemistry Analyzer and whole blood samples were analyzed on an Abaxis HM5 Diagnostic Analyzer. VS2 analysis quantified values of 13 biochemistry analytes for the period 1983-2016. Complete blood count (CBC) analyte values were quantified from the HM5 analysis for the period 2005-2018. These data were used to (i) generate reference ranges of serum biochemistry analyte values for healthy polar bears (Fry et al. 2019), and (ii) examine factors that may influence biochemistry and CBC analyte values over time (Fry et al. 2023).

DataID: 580 | doi:10.5066/P9OXCRJ6 | Date Posted Online: 2023-07-06 | Last Updated: 2023-07-06 14:30:48

This dataset consists of three tables, 1) taxonomy, 2) contributors, and 3) shorebird morphological measurements collected from various species captured from 1977-2021. In addition, photographs of plumage patterns are available for several species. Researchers with the U.S. Geological Survey - Alaska Science Center, along with collaborators from many government agencies and research institutions, have studied shorebirds at numerous sites across North America, the Pacific Ocean, Australia, and New Zealand. This release includes over 10,000 observations relating to 35 shorebird species.

DataID: 577 | doi:10.5066/P9KNRWXB | Date Posted Online: 2023-07-05 | Last Updated: 2023-07-06 14:29:00

This data package contains digital photos of a walrus haulout location at Cape Greig, on the Alaska Peninsula summer 2023. Photos were taken up to three times daily from a remotely operated camera located on a bluff above the haulout. The camera was installed in the early spring 2023, prior to arrival of walruses at the site. Images were transferred via satellite link.

DataID: 576 | doi:10.5066/F7XW4H88 | Date Posted Online: 2023-06-21 | Last Updated: 2024-01-16 10:48:27

This data package provides four datasets acquired for the purpose of quantifying parameters affecting sediment trasport along the Totatlanika River, which drains the minerally endowed and tectonically active northern Alaska Range. The datasets provide measures of: (1) channel geometry, (2) boulders, (3) sediment grains size, and (4) water flow. The data can be used to understand sediment transport and landscape processes in this system.

DataID: 574 | doi:10.5066/F7X63KF2 | Date Posted Online: 2023-06-16 | Last Updated: 2023-06-16 14:08:16

This dataset provides annual summaries of information on age-0 sablefish in Rhinoceros Auklet (Cerorhinca monocerata) chick diets from Middleton Island, Alaska. This includes number of diet samples, number of sablefish sampled, proportion of total biomass, catch per unit effort, and frequency of occurrence for each year.

We calculated an annual growth index for age-0 sablefish using the relationship between mean length by day and Julian day for each year (OLS_{[F = 24.44, df = 61, 184]}: R² = 0.85, p < 0.001). From this model, growth (in mm per day) is the slope, and predicted length (in mm) is the length on the median Julian day = 205 (July 24). Annual anomalies of growth and length are calculated for each variable by subtracting the mean of all years.

DataID: 568 | doi:10.5066/P94KVH9X | Date Posted Online: 2023-06-14 | Last Updated: 2023-06-14 14:19:13

This dataset is one table with data collected and derived from polar bears sampled in Alaska's southern Beaufort Sea during 2015-2019. Data include demographic and morphometric information from each sampled polar bear, gut microbiome diversity indices derived from fecal DNA metabarcoding, and the proportion of prey species detected in individual bear diets derived from quantitative fatty acid analysis (QFASA). The presence of prey items in the diet of polar bears was also assessed using fecal DNA metabarcoding. Note that cetacean data obtained via DNA metabarcoding was not analyzed and is not presented in this data release. Only southern Beaufort Sea population data are included in this USGS data release. All DNA sequence data have been submitted to the NCBI Short Read Archive (accession bioproject ID: PRJNA773176).

DataID: 566 | doi:10.5066/P97KU2YD | Date Posted Online: 2023-06-09 | Last Updated:

This dataset provides salinity measurements collected from water bodies along 17 east-west transects in along the lower Kashunuk River, Yukon-Kuskokwim Delta National Wildlife Refuge, 25 June - 30 July 1993.

DataID: 565 | doi:10.5066/P9HWRN22 | Date Posted Online: 2023-05-08 | Last Updated: 2023-05-08 12:22:15

This data package presents raw and digitally transcribed legacy data collected at study sites near Kokechik Bay on the Yukon-Kuskokwim Delta, Alaska during the summers of 1982 through 1988. These data were collected to provide baseline information on goose behavior and reproductive success on the Yukon-Kuskokwim Delta in western Alaska. Additional raw data corresponding to goose banding and bird species presence/absence observations are included with this data release package.

The data are provided as digital scans (PDF format) of original field data sheets, notebooks and tables. Additionally, digital tables (CSV format) are provided for data (i.e., goose behavior, goose egg measurements, and goose nest monitoring) that were transcribed by the project’s principal investigator prior to her retirement from USGS Alaska Science Center. All data are organized in folders by topic according to the "Data Inventory" below.

Because some of the data are in original form and were not digitized at the time of data collection, those data have not undergone formal Quality Assurance/Quality Control (QA/QC). These are scanned originals and replications and some text may be illegible. Additional documentation of project field methods are limited, however, a thesis and journal articles summarizing data collected at several locations are listed in the Cross Reference section.

About the Legacy Data Collection

Between 1982-1988, the project’s principal investigator and supporting biologists collected biological information on Emperor Geese, Cackling Geese, Greater White-fronted Geese, and Black Brant. The data entry computer program (SUMPRG99.f77, Colleen M. Handel) was developed for this specific project and provided the basis for future biological data collection processes.

This U.S. Geological Survey Data Release is a collection of original and scanned field data, field notes, maps, and figures. All documents have been digitally scanned (PDF format) or digital transcribed (CSV format) and are archived at the USGS Alaska Science Center.

Data Constraints

Please note: All bird species checklists have been submitted to the eBird database hosted by the Cornell Lab of Ornithology (eBird.org). Checklists are also available as a data download from USGS Alaska Science Center under the “Western Alaska” region (Bird Species Checklists from USGS Alaska Science Center Field Camps).

Collection Metadata (Zip)

Suggested Citation: Petersen, M.R., 2023. Breeding biology, behavior, and morphology of emperor geese and other waterfowl near Kokechik Bay, Yukon Delta National Wildlife Refuge, Alaska during 1982-1986 (ver 3.0. March 2024): U.S. Geological Survey data release, https://doi.org/10.5066/P9QAX2UQ

Data Inventory

• NOTES: Summaries of goose banding and collaring including dates, number of geese, and species identification [1983, 1984; 2 PDF; 91.2 KB]
• RAW DATA: Banding schedules and morphological measurements of banded and collared geese [1982, 1983, 1984, 1985, 1986; 19 PDFs;,1 docx; 32.4 MB]
• TABLES: Summary of Cackling Canada Geese banded by Alaska Office of Fish and Wildlife Research June-Aug 1986 [1986; 1 PDF; 14.4 KB]

Goose Behavior

• NOTES: Chronology of banded goose nesting activities and other behaviors [1982, 1983, 1984, 1985, 1986; 3 PDFs; 9.65 MB]
• RAW DATA: Tables with species counts, behavior, habitat use, and direction of travel as observed from an observation tower or camp near Kokechik Bay [1983, 1984, 1985, 1986; 23 PDFs; 568 MB]
• TRANSCRIBED DATA: Digitized (.csv) tables of Emperor Goose behaviors and banded waterfowl resights  [1983, 1984, 1985, 1986; 3 CSV; 3.48 MB]
• VIDEOS: Digitized (MP4) videos of Emperor Goose behavior observed from towers near Kokechik Bay [1983, 1984; 91 videos; 30.7 GB]

Goose Nests

• ANALYSES: Egg temperature and morphological measurement statistics for goose eggs [1986, 1987, 1988; 2 PDFs; 19.9 MB]
• NOTES: Initial descriptions of habitat types found on the Yukon-Kuskokwim River Delta including, tidal sedge meadow, sedge-grass meadow, upland tundra, Elymus meadow, sedge sphagnum bog, and tall sedge marsh [1980; 1 PDF; 102 KB]
• RAW DATA: Brood sizes and nest monitoring of geese nesting near Kokechik Bay [1986; 5 PDFs; 1.64 MB]
• TRANSCRIBED DATA: Goose nest monitoring data including egg measurements, nest fate, and productivity [1982, 1983, 1984, 1985, 1986; 4 CSV; 680 KB]

Bird & Mammal Checklists

• NOTES: Bird and mammal checklists collected in a notes format [1982, 1984, 1985, 1986; 3 PDFs; 7.61 MB]
• RAW DATA:  Bird and mammal species presence data in the format of a table with species listed in the rows and the date of observation listed in the columns [1982, 1983, 1984, 1985, 1986; 5 PDFs; 37.6 MB]

Predator Scans

• NOTES: Predator observations in the Kokechik Bay region [1986; 2 PDFs; 838 KB]
• RAW DATA: Predator observations in the Kokechik Bay region and quantification of jaeger predation [1986; 3 PDFs; 3.18 MB]

Snow Transects

• RAW DATA: Walking transects to determine the percentage of snow and ice cover at study sites at different times and dates during spring and summer in the Kokechik region [1986; 1 PDF; 302 KB]

Aerial Images

• IMAGES: LiDAR aerial images from the Kokechik region collected in 1986 [1986; 14 PDFs; 2.51 MB]

Related Publications

Petersen, M. R. 1990. Nest-site selection by emperor geese and cackling Canada geese. Wilson Bulletin 102:413-426. http://www.jstor.org/stable/4162898

Petersen, M. R. 1991. Reproductive Ecology of Emperor Geese. Ph.D. dissertation. University of California, Davis.

Petersen, M. R. 1992. Intraspecific variation in egg shape among individual emperor geese. Journal of Field Ornithology 63: 344-354.

Petersen, M. R. 1992. Reproductive ecology of emperor geese: annual and individual variation in nesting. Condor 94: 383-397. http://www.jstor.org/stable/1369211

Petersen, M. R. 1992. Reproductive ecology of emperor geese: survival of adult females. Condor 94: 398-406. http://www.jstor.org/stable/1369212

Petersen, M. R., J. A. Schmutz, and R. F. Rockwell. 1994. Emperor goose (Chen canagica). In The Birds of North America, No. 97 (A. Poole and F. Gill, Eds.). Philadelphia: The Academy of Natural Sciences; Washington, D.C.: The American Ornithologists’ Union.

Rockwell, R. F., M. R. Petersen, J. A. Schmutz. 1996. The emperor goose: an annotated bibliography. Institute of Arctic Biology. Biological Papers of the University of Alaska No. 25. ISSN 0568-8604.

Schmutz, J. A., S. E. Cantor, and M. R. Petersen. 1994. Seasonal and annual survival of emperor geese. Journal of Wildlife Management 58: 525-535. http://www.jstor.org/stable/3809325

Schmutz, J. A., R. F. Rockwell, and M. R. Petersen. 1997. Relative effects of survival and reproduction on the population dynamics of emperor geese. Journal of Wildlife Management 61: 191-201. http://www.jstor.org/stable/3802428

DataID: 564 | doi:10.5066/P9QAX2UQ | Date Posted Online: 2023-04-26 | Last Updated: 2023-04-26 10:44:14

This data set contains U-Pb isotopic data and ages, Hf isotope data, and trace element concentrations of zircon from igneous rocks collected from the Yukon-Tanana Upland, eastern Alaska. The sample suite was collected as part of geological mapping and supporting geochemical and geochronological analysis conducted from 2013 to 2019. Zircon was obtained from these igneous rocks to determine the crystallization age for the bedrock samples. The data tables accompanying this data release report the composition of uranium (U) and thorium (Th) measured in each grain, ratios of three isotopes of lead (206Pb, 207Pb, 208Pb), two isotopes of uranium (235U and 238U), and one isotope of thorium (232Th), as well as the age of each grain, plus trace element abundances from the same ablated aliquot, including P, V, Sr, high field strength elements (HFSE), and rare earth elements (REE). Reported Hf (and Lu) isotope data includes 176Hf/177Hf, 176Lu/177Hf, and 178Hf/177Hf ratios, calculated epsilon Hf values, and age-corrected isotope ratios and epsilon values.

DataID: 563 | doi:10.5066/P9O1DMIE | Date Posted Online: 2023-04-25 | Last Updated:

This data package includes two folders of data from Pacific Black Brant (Branta bernicla nigricans) during winter and migration periods.

One folder has data from brant wintering along the Baja California Peninsula and Sonoran coasts of Mexico. The data include: (1) body mass and morphological measurements from sport hunter harvested brant, and (2) census counts of brant in Bahia de San Quintin, (3) counts for flock age ratio determination, and (4) behavior.

The other folder has data from brant tagged with VHF radio transmitters in July 1999 on the Yukon Kuskokwim Delta, Alaska and detected in the following two years during their annual migration. Data include: 1) one table with attributes of the tagged brant, 2) one table with estimated dates of migration events, and 3) seven tables of detection data from radio tracking scans at coastal sites between Alaska and Mexico.

DataID: 562 | doi:10.5066/F7T43R88 | Date Posted Online: 2023-04-24 | Last Updated: 2024-02-22 12:55:40

This dataset identifies lead (Pb) concentration found in the blood of waterfowl sampled in western and northern Alaska and eastern Russia between 1993 and 2022. Data include age, sex, body measurement, capture location, presence or absence of lead shot on x-rays, and blood lead levels. Because the study took place over a number of years at the same study sites, many of the same birds were sampled in multiple years.

DataID: 71 | doi:10.5066/F7B27SDZ | Date Posted Online: 2023-04-17 | Last Updated: 2023-04-17 16:30:58

This data set includes information on collections of surface water and fecal samples from wild gulls (Larus spp.) at two locations on the Kenai Peninsula, Alaska, USA. Samples were screened for Escherichia coli (E. coli) and Klebsiella pneumoniae (K. pneumoniae) and tested for resistance to multiple antibiotics.

DataID: 560 | doi:10.5066/P9ZS79OL | Date Posted Online: 2023-03-31 | Last Updated: 2023-04-12 16:57:59

This dataset includes locations and water surface elevation measurements from submersible pressure transducers deployed in channels of three rivers in Alaska: Susitna and Yukon Rivers (July-October 2020), and Nushagak River (May to September 2021).

DataID: 557 | doi:10.5066/P9TDI0A6 | Date Posted Online: 2023-03-20 | Last Updated:

These data are in four tables relating to nest visit data of Emperor Geese on the Yukon-Kuskokwim Delta in Alaska, 1994-2017. The tables provide: (1) nest visit and hatch success, (2) visit history, (3) capture history, and (4) environmental covariates such as fox and vole abundance and weather data. The code used to conduct the analyses is also included as a text file.

DataID: 554 | doi:10.5066/P9891BFB | Date Posted Online: 2023-03-15 | Last Updated:

These data are part of the Gulf Watch Alaska (GWA) long-term monitoring program and contain diet data from Black-legged Kittiwakes (BLKI), Rhinoceros Auklets (RHAU), and Tufted puffins (TUPU) located on Middleton Island in Prince William Sound, Gulf of Alaska. The first table consists of information on seabird diet samples including the sampling method and number of prey types identified per sample ("seabirdDiets_foodSample_middletonIsland.csv"). The second table is similar to the first table, however, the samples have been subdivided by individual prey species ("seabirdDiets_samplePrey_middletonIsland.csv"). The third table consists of information specific to sampled prey items, such as prey taxa identification and morphometrics ("seabirdDiets_preyItems_middletonIsland.csv"). The fourth table consists of processed diet information and indices specific to Black-legged Kittiwake and Rhinoceros Auklet prey ("seabirdDiets_RHAU_BLKI_diets_middletonIsland.csv"). The fifth table contains prey species and seabird species taxonomy information ("seabirdDiets_speciesTaxonomy_middletonIsland.csv"). All samples included in the tables of this data release were collected during the spring and summer months from 1978-2022.

DataID: 555 | doi:10.5066/P93I0P67 | Date Posted Online: 2023-03-15 | Last Updated: 2023-03-15 15:10:05

These data provide information in support of the creation of a bioenergetic model to estimate winter prey consumption by Barrow’s Goldeneye (Bucephala islandica). One table consists of mass and morphological measurements of wintering Barrow’s Goldeneyes captured or collected in Alaska and British Columbia from 1996 to 2015. The second table consists of size classes of Pacific blue mussels (Mytilus trossulus) consumed by Barrow’s Goldeneye that were collected in Prince William Sound, Alaska in 1996.

DataID: 552 | doi:10.5066/P91ZXI8U | Date Posted Online: 2023-02-23 | Last Updated: 2023-02-23 15:21:46

This data release supports the paper titled, "Insights into the metamorphic history and origin of flake graphite mineralization at the Graphite Creek graphite deposit, Seward Peninsula, Alaska, USA", published in the journal Mineralium Deposita. The data release includes zircon and titanite U-Pb-Thisotope and age data, monazite U-Pb-Th isotope, trace element and age data, carbon and sulfur stableisotope data, and graphite Raman spectroscopy data, from samples collected at the Graphite Creek deposit, Alaska. Sample location information and descriptions are in table "sample_descriptions.csv". The raw numerical data are presented in tabular format. Additionally, plots of select zircon data – conventional discordia, U/Th vs age, U (ppm) vs age, and percent discordance vs age – are included in PDF format (zircon_plots.pdf), along with scanning electron microscope cathodoluminescence images of zircon in TIFF format. Folder "zircon_data" contains all zircon numerical data, plots, and images. Table "raman_peak_fits.csv" contains all raw Raman spectra peak fit data. Table "monazite_isotopic_data.csv" contains all monazite data. Table "carbon_sulfur_isotopic_data.csv" contains all carbon and sulfur data. Interpretations of the data are presented in the aforementioned journal paper.

DataID: 553 | doi:10.5066/P9J50EKX | Date Posted Online: 2023-02-23 | Last Updated: 2023-02-24 08:27:01

These are data collected from polar bears from the southern Beaufort Seas during the spring and fall between 2004 and 2011. Data include individual ID, sex and age class, presence of dependent young, season of sample collection, total mercury concentration derived from a hair sample, estimate of annual diet proportion, and indices of body condition.

DataID: 551 | doi:10.5066/F70Z71H2 | Date Posted Online: 2023-02-21 | Last Updated: 2023-02-21 08:30:08

This data package presents raw and digitally transcribed legacy data collected at study sites near the Old Chevak Field Station on the Yukon-Kuskokwim Delta, Clarence Rhode National Wildlife Range (now Yukon Delta National Wildlife Refuge, Alaska during the summers of 1973 through 1975. These data were collected to provide a basis for evaluation of long-term changes in loon (Pacific and Red-throated Loon) biology on the Yukon-Kuskokwim Delta in western Alaska.  Additional data corresponding to waterfowl breeding biology, habitat classification and fish sampling in the Yukon-Kuskokwim Delta region are also provided in this data release.

The data are provided as digital scans (PDF format) of original field data sheets, notebooks, maps, and figures. Additionally, digital tables (CSV format) are provided for data (i.e., loon chick measurements, loon egg measurements, loon nest monitoring, and general loon observations) that were transcribed by the project's principal investigator prior to her retirement from USGS Alaska Science Center.  All data are organized in folders by topic according to the "Data Inventory" below.

Because some of the data are in original form and were not digitized at the time of data collection, those data have not undergone formal Quality Assurance/Quality Control (QA/QC). These are scanned originals and replications and some text may be illegible. Additional documentation of project field methods are limited, however, a thesis and journal articles summarizing data collected at several locations are listed in the Cross Reference section.

About the Legacy Data Collection

Since the lands of the Yukon-Kuskokwim Delta were first set aside to preserve breeding birds, the refuge has taken on many names. In 1960, the Kuskokwim National Wildlife Range was established and in the following year, it was enlarged, and the name was changed to the Clarence Rhode National Wildlife Range. In December 1980, President Jimmy Carter signed the Alaska National Interest Lands Conservation Act, and the existing ranges and refuges were combined to form the Yukon Delta National Wildlife Refuge.

Between 1973-1975, the project's principal investigator and supporting biologists collected biological information on loons and other waterbirds in the Clarence Rhode National Wildlife Range. This research was part of a master's degree but formed the basis for future work on loons and waterfowl in the region. Additionally, it should be noted that Pacific Loon were classified as Arctic Loon during the 1970s, therefore, all Arctic Loon data included in this data release are the equivalent to Pacific Loon.

This U.S. Geological Survey Data Release is a collection of original and scanned field data, field notes, maps, and figures. All documents  have been digitally scanned (PDF format) or digital transcribed (CSV format) and are archived at the USGS Alaska Science Center.

Data Constraints

Transcribed data are available for direct download by clicking the "Data Download" link at the top of the page. Scans of field data, notes, maps, and figures are available for download upon request by contacting ascweb@usgs.gov.  All scans are in PDF document format and have not been checked for accuracy or completeness. Several documents are poor quality scans and may contain sections that are illegible. Further, all PDF documents are provided "as is" and do not follow 508 compliance standards.

Please note: All bird species checklists have been submitted to the eBird database hosted by the Cornell Lab of Ornithology (eBird.org). Checklists are also available as a data download from USGS Alaska Science Center under the "Western Alaska" region (Bird Species Checklists from USGS Alaska Science Center Field Camps).

Suggested Citation: Petersen, M.R., 2023. Breeding biology of loon and waterfowl species on the Yukon Delta National Wildlife Refuge, Alaska during 1973-1975: U.S. Geological Survey data release, https://doi.org/10.5066/P9H7L86E

Data Inventory

• Behavior
• NOTES: Foraging behavior of Arctic [Pacific Loons] and Red-throated Loons [1973; 1 PDF; 551 KB]
• Body Composition
• RAW DATA: Body condition metrics of collected (dead) Arctic [Pacific Loons] and Red-throated Loons [1974, 1975; 2 PDFs; 1.90 MB]
• Brood Monitoring
• RAW DATA: Arctic [Pacific Loon] and Red-throated Loon brood size observation tables and maps [1973; 1 PDF; 938 KB]
• Chick Measurements
• RAW DATA: Morphological measurements of Arctic [Pacific Loons] and Red-throated Loons distributed across various ponds [1973, 1974, 1975; 1 PDF; 1.58 MB]
• TRANSCRIBED DATA: Morphological measurements of Arctic [Pacific Loons] and Red-throated Loons; see "Data Download" link at top of page for direct download [1974, 1975; 1 CSV; 14.5 KB]
• Egg Measurements
• TRANSCRIBED DATA: The length, width, and weight of Arctic [Pacific Loon] and Red-throated Loon eggs; see "Data Download" link at top of page for direct download [1973, 1974, 1975; 1 CSV; 19.4 KB]
• Nest Monitoring
• RAW DATA: Date of discovery, fate, and clutch size of Arctic [Pacific Loon] and Red-throated Loon nests [1974, 1975; 3 PDFs; 6.05 MB]
• TRANSCRIBED DATA: Habitat type of nest location and incubation dates of Arctic [Pacific Loon] and Red-throated Loon eggs; see "Data Download" link at top of page for direct download [1974, 1975; 1 CSV; 27.5 KB]
• Observations
• NOTES: Pre-and post-nesting observations of Arctic [Pacific Loons] and Red-throated Loons from the edge of ponds and an observation tower [1973, 1974, 1975; 5 PDFs; 152 MB]
• RAW DATA: Observations of Arctic [Pacific Loon] and Red-throated Loon groups on rivers, bays, and ponds [1973, 1974, 1975; 2 PDFs; 4.41 MB]
• TRANSCRIBED DATA: Weather conditions and Arctic [Pacific Loon] and Red-throated Loon observations; see "Data Download" link at top of page for direct download [1974, 1975; 1 CSV; 643 KB]
• Pond Habitat
• MAPS: Locations where pond habitat and vegetation type was recorded [1974, 1975; 1 PDF; 2.38 MB]
• NOTES: Vegetation types surrounding ponds used by nesting loons [1974, 1975; 1 PDF; 16.9 MB]
• RAW DATA: Pond cover by ice and pond size measurements [1974, 1975; 2 PDFs; 914 KB]
• Weather Conditions
• RAW DATA: Daily weather conditions during bird observations [1973, 1974, 1975; 1 PDF; 2.30 MB]

Waterfowl and Other Birds

• Banding Measurements
• RAW DATA: Live Cackling Goose weights and measurements [1973; 1 PDF; 233 KB]
• Brood Monitoring
• RAW DATA: Brood size observations for Black Brant, Cackling Goose, Emperor Goose, Greater White-fronted Goose, Mallard, Mew Gull [Short-billed Gull], Spectacled Eider, and Willow Ptarmigan [1973, 1974, 1975; 11 PDFs; 1.78 MB]
• Captive Measurements
• RAW DATA: Morphological measurements of Cackling and Emperor Goose goslings held in captivity [1973; 2 PDFs; 7.40 MB]
• Collected Measurements
• NOTES: Handwritten notes on the collection method and location of Cackling Geese used in the measurement dataset [1975; 1 PDF; 1.80 MB]
• RAW DATA: Morphological measurements of collected (dead) Cackling Geese from Clarence Rhode National Wildlife Range (Yukon Delta National Wildlife Refuge) [1973, 1975; 2 PDFs; 349 KB]
• Nest Monitoring
• FIGURES: Bar charts of Cackling Geese clutch sizes [1974; 1 PDF; 59.6 KB]
• MAPS: Locations of Cackling Goose, Emperor Goose, Greater White-fronted Goose, Spectacled Eider, Sabine's Gull, Arctic Tern, Greater Scaup, and Glaucous Gull nests [1974, 1975; 3 PDFs; 372 KB]
• RAW DATA: Nest information and egg measurements for Arctic Tern, Black Brant, Black Turnstone, Cackling Goose, Dunlin, Emperor Goose, Glaucous Gull, Greater Scaup, Greater White-fronted Goose, Oldsquaw [Long-tailed Duck], Northern Pintail, Sabine's Gull, Mew Gull [Short-billed Gull], Whistling Swan [Tundra Swan], and Willow Ptarmigan [1973, 1974, 1975; 24 PDFs; 3.82 MB]
• Resightings
• NOTES: Notes about waterfowl resightings on the Sacramento National Wildlife Refuge for birds banded on the Clarence Rhode National Wildlife Range (Yukon Delta National Wildlife Refuge)  [1973; 1 PDF; 88.5 KB]
• Species Accounts
• NOTES: Observations of flock and individuals of American Golden-Plover, Arctic Tern, Bar-tailed Godwit, Black Brant, Black Turnstone, Cackling Goose, Dunlin, Emperor Goose, Glaucous Gull, Greater Scaup, Greater White-fronted Goose, Lapland Longspur, Lesser Canada Goose, Oldsquaw [Long-tailed Duck], Long-tailed Jaeger, Marsh Hawk [Northern Harrier], Northern Pintail, Parasitic Jaeger, Red-breasted Merganser, Sabine's Gull, Sandhill Crane, Short-eared Owl, Spectacled Eider, Whistling Swan [Tundra Swan], Western Sandpiper, and Willow Ptarmigan   [1973, 1974, 1975; 37 PDFs; 9.67 MB]
• RAW DATA: Observations of Greater White-fronted Goose, Sandhill Crane, and Willow Ptarmigan. All species checklists are available for viewing here: https://doi.org/10.5066/P950QX28 [1975; 3 PDFs; 572 KB]
• Specimen List
• RAW DATA: Inventory of all specimens collected on the Clarence Rhode National Wildlife Range (Yukon Delta National Wildlife Refuge)  and deposited at the Museum of Wildlife and Fisheries Biology at UC Davis [1973, 1974, 1975; 2 PDFs; 628 KB]

Fish

• Sampling
• MAPS: Hand-drawn locations of where fish were sampled in the Yukon Delta region [1974; 1 PDF; 363 KB]
• RAW DATA: Location of fish sample and method for collecting the sample [1974; 1 PDF; 118 KB]

Related Publications

DataID: 550 | doi:10.5066/P9H7L86E | Date Posted Online: 2023-02-15 | Last Updated: 2023-02-15 12:07:10

This dataset provides nine tables of data from an experimental study in which juvenile Coho Salmon (Oncorhynchus kisutch) were reared in floating net pens (limnocorrals) and exposed to Elodea spp. (a potential invasive species in high latititude lakes) and native aquatic vegetation. Data include: (1) coho salmon body, otolith, and stable isotope measurements, (2) abundance of macroinvertebrates, (3) zooplankton, (4) periphyton, (5) aquatic vegetation, (7) measurement of chlorphyll A, (8) dissolved oxygen, and (9) water temperature.

DataID: 549 | doi:10.5066/P9GXS8G8 | Date Posted Online: 2023-02-13 | Last Updated:

This data set is comprised of one table with sampling information and NCBI BioProject accession numbers for sequence information of this amplicon-based study targeting Loon (Gavia sp.) and fish species expected in lake systems of the North Slope of Alaska from fecal samples. Highly conserved primers which could differentiate species of interest were developed for five portions of gavia mtDNA genes (COXI, CytB, ND1, ND2, and ND5) and two portions of fish mtDNA genes (12S, and CytB). The reference sequences and conserved primer sets to identify species present were developed using publicly available data from NCBI GenBank.

DataID: 548 | doi:10.5066/P9VMYY4J | Date Posted Online: 2023-02-10 | Last Updated: 2023-02-10 12:14:18

This data set contains U-Pb isotopic data and ages, Hf isotope data, and trace element concentrations of zircon from igneous rocks collected from the western Alaska Range of south-central Alaska. The sample suite was collected as part of geological mapping and supporting geochemical and geochronological analysis conducted from 2011 to 2013. We also analyzed portions of remainders of previously collected igneous bedrock samples from the USGS archive, allowing expansion of the dataset to include igneous bodies that were not sampled during 2011–2013 field work or were outside the area of focused project field work. Zircon was obtained from these igneous rocks to determine the crystallization age for the bedrock samples. The data tables accompanying this data release report the isotopic composition of uranium (U) and thorium (Th) measured in each grain, ratios of three isotopes of lead (208Pb, 207Pb, and 206Pb), two isotopes of uranium (235U and 238U), one isotope of thorium (232Th), and the age of each grain, plus trace element abundances from the same ablated aliquot, including P, V, Sr, high field strength elements (HFSE), and rare earth elements (REE). Reported Hf (and Lu) isotope data includes 176Hf/177Hf, 176Lu/177Hf, and 178Hf/177Hf ratios, calculated epsilon Hf values, and age-corrected isotope ratios and epsilon values.

DataID: 546 | doi:10.5066/P9HE4U9N | Date Posted Online: 2023-02-02 | Last Updated: 2023-02-10 12:18:32

This data set contains U-Pb isotopic data and associated ages of detrital zircon from sedimentary and metasedimentary rocks collected from southwestern Alaska and from the Yukon-Tanana upland and environs of eastern interior Alaska and western Yukon, Canada. The samples were collected as part of geological mapping and research conducted from 1996 to 2021 and funded by the Mineral Resources Program of the U.S. Geological Survey. Detrital zircon grains were separated and analyzed by four different laboratories: U.S. Geological Survey laboratories in Denver, Colorado; Apatite to Zircon, Inc. (A2Z); GeoSep Services (GSS); and the University of British Columbia. All analyses were conducted between 2007 and 2021 using laser-ablation-inductively-coupled-plasma-mass spectrometry (LA-ICP-MS) techniques.

DataID: 547 | doi:10.5066/P9PLU6NW | Date Posted Online: 2023-02-02 | Last Updated: 2023-02-10 12:14:15

These data were used to evaluate effects of vessel exposure on Pacific walrus (Odobenus rosmarus divergens) behaviors. We obtained >120,000 hours of location and behavior (foraging, in-water not foraging, hauled out) data from 218 satellite-tagged walruses and linked them to vessel locations from the marine Automated Information System. This yielded 206 vessel-exposed walrus telemetry hours for comparison to unexposed hours which we used to assess if vessel exposure altered walrus behavior.

DataID: 543 | doi:10.5066/P9IO8AZJ | Date Posted Online: 2023-01-23 | Last Updated:

This data set contains U-Pb isotopic data and associated ages of detrital zircon from sedimentary and metasedimentary rocks collected in northern Yukon, Canada. The samples were originally collected as part of geological mapping and research conducted by the Geological Survey of Canada. They were recovered from archived collections and sent to the U.S. Geological Survey for analysis of detrital zircon using U-Pb geochronology methods. Detrital zircon grains were separated and analyzed by GeoSep Services (GSS) in 2015 using laser-ablation-inductively-coupled-plasma-mass spectrometry (LA-ICP-MS) techniques.

DataID: 544 | doi:10.5066/P9RRTBAO | Date Posted Online: 2023-01-23 | Last Updated:

This data set contains uranium–lead (U-Pb) isotopic data and ages, hafnium (Hf) isotope data, and trace element concentrations of zircon from igneous rocks collected from the Darby Mountains area of the Seward Peninsula, Alaska. The sample suite was collected as part of geological mapping and supporting geochemical and geochronological analysis conducted in 2017. The data tables accompanying this data release report the isotopic composition of U and thorium (Th) measured in each grain, ratios of 207Pb and 206Pb and 235U and 238U, and the age of each grain, plus trace element abundances from the same ablated aliquot, including phosphorus (P), vanadium (V), strontium (Sr), high field strength elements (HFSE), and rare earth elements (REE). Reported Hf (and lutetium, Lu) isotope data includes 176Hf/177Hf, 176Lu/177Hf, and 178Hf/177Hf ratios, calculated epsilon Hf values, and age-corrected isotope ratios and epsilon values.

DataID: 545 | doi:10.5066/P9JKR2J6 | Date Posted Online: 2023-01-23 | Last Updated:

This data set provides monthly (March–October) gridded density estimates for seabirds in lower Cook Inlet, Alaska. Gridded density estimates were produced by applying spatiotemporal modeling of at-sea survey data collected between 1975 and 2021 of seabird at-sea surveys available in the North Pacific Pelagic Seabird Database (NPPSD; Drew and Piatt 2015). We modeled joint dynamic species distributions of dark shearwaters (Ardenna spp., including A. grisea and A. tenuirostris), black-legged kittiwake (Rissa tridactyla), common murre (Uria aalge), pigeon guillemot (Cepphus columba), Kittlitz’s murrelet (Brachyramphus brevirostris), marbled murrelet (B. marmoratus), horned puffin (Fratercula corniculata), and tufted puffin (F. cirrhata). Together these species compose 77% of all birds counted on surveys in lower Cook Inlet.

DataID: 542 | doi:10.5066/P94NDFRI | Date Posted Online: 2023-01-03 | Last Updated: 2023-01-03 10:36:37

This release provides results of an environmental DNA (eDNA) study of fish identified in seven Alaskan lakes, three streams, and a positive control. Samples included replicates for multiple sampling dates and locations. The reference list and conserved primer sets to identify species present were developed using publicly available data (https://www.ncbi.nlm.nih.gov/genbank/). Highly conserved primers which could differentiate species of interest were developed for three portions of mtDNA genes (12S, 16S and COI).

DataID: 540 | doi:10.5066/P9RU1RVN | Date Posted Online: 2022-12-13 | Last Updated:

This dataset includes locations, and water surface elevations from two submersible pressure transducers deployed in the channel of the Tanana River downstream of Fairbanks Alaska in 2016.

DataID: 539 | doi:10.5066/P9ZUUVPS | Date Posted Online: 2022-12-12 | Last Updated:

This data package presents legacy data collected during 1985-1988 at Izembek Lagoon on the western end of the Alaska Peninsula. The data were collected in support of a multi-year study focused on aircraft disturbance of waterfowl, particularly Black Brant, Emperor Geese, and Cackling Geese. The study was conducted at Izembek Lagoon and included several study sites within the lagoon: Halfway Point, Grant Point, Outer Marker, Quarter Point, Applegate Cove, Norma Bay, Round Island, and Banding Island. The primary objectives were to 1) determine the effects of aircraft overflights and other human activities on the behavior, distribution, and habitat use of Brant, Cackling, and Emperor Geese, 2) examine noise levels associated with aircraft overflights and determine whether the behavioral response of geese is influenced by noise, 3) evaluate the potential impact of disturbance on the energetic requirements of fall-staging Brant, 4) determine the proportion of time brant spend foraging, resting, and in flight during natural environmental conditions, 5) assess the diet of brant staging at Izembek Lagoon, 6) analyze the nutritional quality of brant foods to determine selection patterns for both plants and plant parts, 7) determine the distribution and abundance of eelgrass, 8) define the time periods that are most important for geese foraging, 9) determine if certain portions of Izembek Lagoon are more important than other areas, 10) evaluate factors that influence distribution of geese within Izembek Lagoon, and 11) compare use by geese of Izembek Lagoon with use of other adjacent lagoons to determine relative importance.

The raw data are provided in a .CSV format, however, PDF digital scans of original field data sheets, tables, figures, and maps are also available upon request.

DataID: 534 | doi:10.5066/P9B98AK4 | Date Posted Online: 2022-12-09 | Last Updated: 2022-12-09 13:59:33

These data are related to surveys of eelgrass beds in Norma Bay, Izembek Lagoon, Alaska. The table provides eelgrass shoot lengths and density measurements from sampling in September 1987.

DataID: 531 | doi:10.5066/P9XNSWES | Date Posted Online: 2022-11-14 | Last Updated: 2023-06-21 12:37:44

This dataset consists of shorebird chick measurements (wing, primary feather 10, diagonal tarsus, and bill length) and body mass for various shorebird species captured in Alaska and Canada during 1978-2022. Researchers with the U.S. Geological Survey - Alaska Science Center, and collaborators from many government agencies and research institutions have studied shorebirds at numerous sites across North America. This release includes over 2,000 observations relating to 17 shorebird species.

DataID: 528 | doi:10.5066/P9ZH3JNQ | Date Posted Online: 2022-11-02 | Last Updated: 2023-03-15 14:28:59

This metadata document describes the data contained in the "processedData" folder of this data package. This data package contains all data collected by the Argos System from 14 satellite transmitters attached to Steller's Eiders on their breeding range in arctic Alaska, 2000-2001. The raw data were processed to accomplish two goals: flag implausible location estimates and decode raw sensor data. Three Comma Separate Value (CSV) tables are included in the "processedData" folder of this data package: 1) the "diag_filteredLocations" table contains one record for every Argos location estimate collected, accompanied by a binary flag that denotes an algorithm's plausibility check (based on distance, turning angle, and rate thresholds). Each record also includes a 'Tracking_Status' variable that denotes whether the location was collected from a live animal, a dead animal, or shed transmitter, 2) the "decodedSensor" table contains decoded sensor data such as the transmitter's temperature, battery voltage, and motion (activity), and 3) the "deploymentAttributes" table contains one record for each transmitter deployment in a CSV formatted table. The deployment attributes file contains information such as when the transmitter was attached to the animal, when tracking of a live animal ended, and a variety of variables describing the animal and transmitter. This table is identical to the "deploymentAttributes" table in the "rawData" folder of this data package.

DataID: 529 | doi:10.5066/P9ECETBG | Date Posted Online: 2022-11-02 | Last Updated:

This metadata document describes the data contained in the "rawData" folder of this data package. This data package contains all data collected by the Argos System from 14 satellite transmitters attached to Steller's Eiders on their breeding range in arctic Alaska, 2000-2001. Five data files are included in the "rawData" folder of this data package. Two data files (with identical content) contain the raw Argos DIAG (Diagnostic) data, one in the legacy verbose ASCII format and one in a tabular Comma Separate Value (CSV) format. Two other data files (with identical content) contain the raw Argos DS (Dispose) data, one in the legacy verbose ASCII format and one in a tabular CSV format. The fifth file, "deploymentAttributes", contains one record for each transmitter deployment in a CSV formatted table. The deployment attributes file contains information such as when the transmitter was attached to the animal, when tracking of a live animal ended, and a variety of variables describing the animal and transmitter. This table is identical to the "deploymentAttributes" table in the "processedData" folder of this data package.

DataID: 530 | doi:10.5066/P9ECETBG | Date Posted Online: 2022-11-02 | Last Updated: 2022-11-07 13:50:54

This dataset consists of one table with estimated locations of adult female polar bears during July-November 1985-2017, used for quantifying changes in summer land use over time. Locations were estimated with a Continuous Time-Correlated Random Walk (CTCRW) model fit to satellite tracking from radio-collared adult female polar bears. All bears included in this data set were captured and instrumented in the Beaufort or Chukchi Sea.

DataID: 525 | doi:10.5066/P9XEOBWV | Date Posted Online: 2022-10-31 | Last Updated: 2022-10-31 11:19:52

This dataset consists of one table with diagnostic screening results from a study of Francisella tularensis bacteria exposure in tundra-nesting geese and mammals and Brucella spp. exposure in mammals sampled from multiple locations on the Arctic Coastal Plain of Alaska, 2014-2017. The table provides sample collection and location data of geese, arctic fox, red fox, caribou, small mammal, and polar bear samples.

DataID: 526 | doi:10.5066/P9B5BSKQ | Date Posted Online: 2022-10-31 | Last Updated:

This dataset contains isotope results of stable isotope (δ13C and δ15N) and radicoarbon (F14C) analyses of muscle tissue from fish collected in the nearshore Beaufort Sea, Alaska in summers 2017-2019.

DataID: 522 | doi:10.5066/P9DAFMJD | Date Posted Online: 2022-10-03 | Last Updated: 2024-01-03 12:51:55

This dataset comprises three tables containing infrared stimulated luminescence (IRSL) ages and related data from samples collected at seven terrace sites along the Totatlanika River in central Alaska in 2020 and 2021. The IRSL ages and data were generated from the samples at the Utah State University Luminescence Lab. The ages were determined to enable computation of rates of bedrock incision along the Totatlanika River. The file "geology_BurialDating_IRSLSiteData_Totatlanika_bender_2022.csv" contains site locations in the NAD83 reference frame, and incision rates computed from listed field-measured terrace heights and IRSL depositional ages of terrace sand. The IRSL age data, in turn, are stored in the file "geology_BurialDating_IRSLAgeData_Totatlanika_bender_2022.csv" and are computed in part from raw data contained in the file "geology_BurialDating_IRSLDoseRate_Totatlanika_bender_2022.csv". Data in all files are linked by the "Sample" field.

DataID: 521 | doi:10.5066/P96KN145 | Date Posted Online: 2022-09-30 | Last Updated: 2023-04-06 09:00:15

Relations between water-surface elevation data derived from satellite altimetry and dynamic surface water extent data derived from LANDSAT imagery data were used with a modified Manning's equation to compute remotely sensed streamflows (RSQ) at locations on the Tanana, Yukon, Susitna, Nushagak, Copper, Koyukuk and Knik Rivers in Alaska using satellite data. Data are organized into zip archives named for each study reach. Refer to the README file in each study reach archive for additional reach-specific details.

DataID: 513 | doi:10.5066/P94LLG4R | Date Posted Online: 2022-09-28 | Last Updated: 2022-10-18 09:54:59

These data are part of the Gulf Watch Alaska (GWA) long-term monitoring program, nearshore monitoring component. The dataset consists of 10 tables of data organized into four folders. The data are presented in Comma Separated Value (CSV) format exported from a Microsoft Access relational database. The tables are: 1) invertebrate taxonomy, 2) limpet size, 3) limpet counts, 4) Nucella, Katharina, and Lirabuccinum counts, 5) rocky intertidal cover, 6) rocky intertidal percent cover, 7) rocky intertidal top layer percent cover, 8) rocky intertidal substrate percent cover, 9) sea star counts, and 10) sea star disease.

DataID: 367 | doi:10.5066/F7513WCB | Date Posted Online: 2022-09-27 | Last Updated: 2023-10-30 16:09:26

This data release contains maps, geospatial files, and a table of the satellite imagery types with the dates when they were collected and examined to interpret the presence of, and area occupied by, walruses at terrestrial haulouts. Estimates of the land area occupied by walruses are provided based on interpretation by experienced image reviewers. The images are from a variety of Earth observing satellite imagery sources collected over coastal areas of the Chukchi Sea (northwestern Alaska and northeastern Russia) in autumn when walruses come ashore in large numbers to rest in the absence of sea ice. Earth observing imagery sources used in this data release include (but are not limited to) optical imagery collections by: (1) the European Space Agency's Sentinel-2 mission and (2) the Plant Labs Planet Scope constellation, as well as synthetic aperture radar imagery collected by: (1) European Space Agency's Sentinel-1 mission; (2) the Canadian Macdonald, Dettwiler and Associates (MDA) RADARSAT-2 satellite (C-band); (3) the DLR (German Aerospace Agency) TerraSAR-X satellite (X-band), and (4) the American Capella Space satellite constellation (X-band).

DataID: 506 | doi:10.5066/P9CSM0KN | Date Posted Online: 2022-09-07 | Last Updated: 2024-02-09 14:29:03

Suggested Citation: Petersen, M.R., 2022, Observational data of migratory birds during spring and fall migration and their use of habitats in the Yakutat Foreland of Alaska in 1980: U.S. Geological Survey data release, https://doi.org/10.5066/P9OF3NRM

This data package supports raw legacy data collected during 1980 on the Yakutat Forelands of Alaska. The data were collected to support a short-term study of waterbird migration patterns and habitat use during spring (April - May) and fall (August - October). The primary objectives of the study included: 1) determine the timing and rates of migration by waterbirds; 2) correlate observed patterns of migration with weather; 3) determine the use of estuarine and riverine systems by waterbirds during migration; 4) determine the use of wetlands and deep-water habitats by migrant waterfowl and shorebirds. Data is available upon request by contacting ascweb@usgs.gov

About the Legacy Data

In spring and fall of 1980, biologists with the U.S. Fish and Wildlife Service Office of Biological Services- Coastal Ecosystems (precursor to USFWS Alaska Region departments and ultimately the Ecosystems Office at the USGS Alaska Science Center) collected observational data on birds and marine and terrestrial mammals occurring within the Yakutat Forelands of Alaska. Primary results were summarized in Petersen et al. (1981; see 'Related Reports and Publications').

This U.S. Geological Survey Data Release is a collection of original field data, maps, notes, and infrared photographs. All documents and photographs have been digitally scanned in PDF format and are archived along with original physical copies at the USGS Alaska Science Center.

Data Constraints

Observational raw data, notes, maps, and infrared photographs are available for download in PDF format upon request by contacting ascweb@usgs.gov. All PDF documents were checked for accuracy and completeness prior to retirement by the principal investigator. Finally, all PDF documents are provided “as is” and do not follow 508 compliance standards.

Please note: All bird species checklists have been submitted to the eBird database hosted by the Cornell Lab of Ornithology (ebird.org). Checklists are also available as a data download from USGS Alaska Science Center under the :Southeast” region (Bird Species Checklists from USGS Alaska Science Center Field Camps).

Data Inventory

• Bird and Mammal Taxonomy List
  • Taxonomic species list of all birds and mammal recorded duringaerial and ground plot surveys. List includes order, family, genus, species,common name, historical common name, and species codes. Corresponds to all species lists described in the inventory below:

Migration Sea Watches

• Bird and Mammal Species Surveys (marine)
  • RAW DATA: Bird and mammal species observed during daily 15-min increment counts in spring and fall of 1980 [2 documents; 22.7 MB]
  • PROCESSED DATA: Summary of bird species observed on specific dates in April-October of 1980 [1 document; 7.10 MB]

Migration Aerial Surveys

• Bird and Mammal Species Surveys (aerial)
  • RAW DATA: Aerial observation of bird and mammal species by day and location (i.e., intertidal or rivers) via a Turbo Beaver or Piper Super Cub aircraft [1 document; 16.9 MB]
  • MAPS: Aerial survey routes indicated on maps [1 document; 436 KB]
  • NOTES: Aerial survey distances and notes on flight routes and species observed [2 documents [2 documents; 13.8 MB]

Migration Ground Plots

• Bird Species Lists (ground-based)
  • RAW DATA: Bird lists from walking surveys by day and species. Spring and fall are combined on data sheets [1 document; 1.12 MB]

• Habitat Classification
  • RAW DATA: Vegetation classification (Viereck and Dyrness 1980) and the corresponding bird habitat (Kessel 1979) code for ground-based survey plots [1 document;  1.15 MB]

• Habitat Use
  • RAW DATA: Habitat use by birds including date, weather, location, species, and activity [1 document; 4.34 MB]

Migration Species Accounts

• Bird and Mammal Observation Summary
  • PROCESSED DATA: Summary of bird and mammal species observed during sea watch and ground plot surveys [1 document; 8.28 MB]
  • NOTES: Handwritten notes summarizing date, location, survey type and species observed [1 document; 21.2 MB]

Migration Habitat

• Habitat Classification
  • PHOTOS: Color infrared photographs of the Yakutat Forelands [1 document; 2.54 MB]
  • MAPS: Identification of vegetation classes by interpreting color infrared maps [1 document; 1.69 MB]

Related Reports and Publications

The following reports and publications have presented results from this study or serve as a follow-up to this study. It is possible that other documents supported by these data exist but are not included in this list. Documents are available for download through ServCat (U.S. Fish and Wildlife Service; access by DOI agencies only) or ARLIS (Alaska Resources Library and Information Services; https://www.arlis.org/.

Petersen, M.R., Greilich, J.C., Harrison, N.M. 1981. Spring and fall migration, and habitat use by water birds in the Yakutat Forelands, Alaska – 1980. Unpublished report. U.S. Fish and Wildlife Service, National Fisheries Research Center, Marine Bird Section, Anchorage, Alaska. 106 pp.

Shephard, M.E. 1993. Plant community ecology and classification of the Yakutat forelands, Alaska: 1992 progress report. Alaska Natural Heritage Program, Anchorage, AK.

Andres, B.A., Browne, B.T. 1998. Spring migration of shorebirds on the Yakutat Forelands, Alaska. The Wilson Bulletin 110(3):326-331. https://www.jstor.org/stable/4163956

Andres, B.A., Browne, B.T. 2004. The birds of Yakutat, Alaska. U.S. Fish and Wildlife Service, Technical report R10-TP-131. Arlington, VA.

Andres, B.A., Browne, B.T., Brann, D.L. 2005. Composition, abundance, and timing of post-breeding migrant landbirds at Yakutat, Alaska. The Wilson Bulletin 117(3):270-279. https://www.doi.org/10.1676/04-039.1

DataID: 504 | doi:10.5066/P9OF3NRM | Date Posted Online: 2022-08-25 | Last Updated:

These are surgery data sheets filled out during operations on many bird species by the USGS Alaska Science Center, 1993-2012. The majority of surgeries were to implant intracoelomic tracking transmitters, but a subset were to collect liver biopsy samples. The data sheets provide information about individual surgeries, including: data about each bird, the timing of steps during each operation, administration of the anesthesia (Propofol or Isoflurane), and conditions during surgery. Data were collected from waterfowl, seabirds and shorebird species from regions across Alaska, as well as parts of Mexico, Canada, New Zealand, and The Netherlands.

The data are provided in PDF format of digitally scanned original field data. Because the data are in original form and were not digitized at the time of collection, not all data has undergone formal Quality Assurance/Quality Control (QA/QC). These are scanned originals and some text may be illegible. A comprehensive list of available data sheets is provided with this data release, 'intracoelomicTransmitters_eventIndex_mulcahy_1993-2012.csv'.

DataID: 503 | doi:10.5066/P9CWYQGU | Date Posted Online: 2022-08-17 | Last Updated: 2022-08-17 16:18:11

This dataset contains the growth index from annual growth bands in the shells of two bivalve clam species (Astarte borealis and Liocyma fluctuosa) captured in the Chukchi Sea, Alaska. The growth index is based on a measurement of the annual growth increment width that has been detrended for age-related differences in growth.

DataID: 502 | doi:10.5066/P9YU8G8L | Date Posted Online: 2022-08-02 | Last Updated:

This data set consists of one table containing whole-rock geochemistry data for 753 igneous and metamorphic rocks from the Yukon-Tanana upland of eastern interior Alaska, collected between 2013 and 2019. All materials were analyzed by ALS Global, between 2014 and 2020, by a range of different techniques, so multiple unique entries for a given element relate to different analytical methods or preparations, as detailed in accompanying metadata.

DataID: 501 | doi:10.5066/P9AX4NAE | Date Posted Online: 2022-07-18 | Last Updated: 2022-07-20 11:02:03

These data are part of the Gulf Watch Alaska (GWA) long-term monitoring program. This dataset consist of observations of sea otter (Enhydra lutris) fecal samples (spraint). Observers examined fresh spraint piles to identify major prey classes in the samples and to determine sea otter diets in the Gulf of Alaska region.

DataID: 500 | doi:10.5066/P9EDM6NL | Date Posted Online: 2022-07-14 | Last Updated: 2023-11-15 11:23:36

These data are in four tables and contain results from screening tissues of marine organisms for the presence of harmful algal bloom (HAB) toxins: saxitoxin and its related congeners (STX) and domoic acid (DA). Samples collected by USGS or submitted to our laboratory by partners or other stakeholders are screened using commercially-available enzyme linked immunosorbent assays (ELISA). A subset of samples containing detectable levels of STX were subsequently analyzed using high-performance liquid chromatography (HPLC). The dataset herein consists of three tables the ELISA test results for STX and DA and HPLC summary results for STX for 1) birds, 2) fish, and 3) invertebrates.

**This data release supersedes a subset of these data previously published in the USGS data releases: https://www.doi.org/10.5066/P9UNY0FR and https://www.doi.org/10.5066/P9OK4I8M.

DataID: 499 | doi:10.5066/P9MLNP9H | Date Posted Online: 2022-07-12 | Last Updated: 2023-04-26 09:41:23

Provided here are three data packages: (1) geospatial vector data showing mapped main channels and alluvial fan extents in the lower 10 kilometers of the Snow River flood plain near Seward, Alaska as part of an assessment of river channel stability under an outburst flood regime, (2) a height-above-river raster produced from 2008 lidar bare-earth elevations for the lower 10 kilometers of the Snow River flood plain, used as part of a geomorphic assessment to identify areas susceptible to inundation and erosion during outburst floods from Snow Lake, and (3) input (raw survey data, computational mesh, hydrologic boundary conditions) and output data for a 2-dimensional hydraulic and sediment transport model of the lower Snow River flood plain near Seward, Alaska.

DataID: 494 | doi:10.5066/P9X2YE9O | Date Posted Online: 2022-07-05 | Last Updated: 2022-07-05 14:19:07

This data release contains whole rock major and trace element data for 69 igneous rock samples collected from the Western Alaska Range between 2011 and 2012. The Series field relates to chronological units discussed in Jones et al. (2021, Geosphere) and Todd et al. (2022 IN PREP). Descriptions are from original collector notebooks and are provided here for informational purposes only.

DataID: 498 | doi:10.5066/P9534J6R | Date Posted Online: 2022-07-05 | Last Updated: 2022-07-19 14:10:17

The imagery and annotations presented here were generated while testing an aerial photographic survey design to improve repeatability, transparency, and estimation of variance for annual population estimates of geese staging at Izembek Lagoon, Alaska. This dataset includes 1) 131,031 .JPG images captured from a small fixed-wing occupied aircraft, usually at an altitude of about 457 m, over Izembek Lagoon; 2) annotations of objects (geese, ducks, and gulls) assigned by an automated algorithm, and 3) manually corrected annotations that were edited by project staff for only those photos automatically identified as containing geese of any species. The photos were captured at predetermined points to systematically sample the waterfowl present on the open water of the lagoon. The systematic sample included photo points over land around the periphery of the lagoon (at the beginning and end of each transect), but only photos that were triggered over open water were evaluated for the presence of waterfowl. The overland photos are included here for completeness, but were not processed and do not have associated annotations or count data. The photos and annotations are organized by year (2017-2019), date (one replicate of the survey [usually complete, but sometimes partial] was conducted on each date, with a total of three surveys in September/October of each year), and camera (two full-frame cameras were used on each replicate, providing non-overlapping images). The full dataset totals 1.82 TB. The EXIF data for each .JPG include the camera parameters and latitude, longitude, and altitude at which the image was captured. Most photos were captured at standard parameters (approximately 457 m altitude and 200 mm focal length, producing an average photo footprint of 4555 sq m [83.1 m × 54.8 m]), but some were captured at other altitudes or shorter focal lengths to evaluate the effect on identifying objects in photos. Photo locations were spaced 62 m apart along each transect; the footprints of photos taken at standard parameters rarely overlapped by approximately 1–2 m when the camera triggering system experienced a brief delay, but photos at lower altitudes or shorter focal lengths sometimes overlapped extensively. Annotations are provided as the coordinates (with pixels as the unit) of each object detected in the photo, with the automatically or manually assigned identification of each object (i.e., bird taxon), in one file per photo (.csv and .json versions). Summary data from the images, including all pertinent metadata and the automated and manual waterbird counts for each image, are available as an accompanying USGS data release (Weiser et al. 2022).

Related Software Release: Weiser, E.L. 2022. R scripts for analysis of fall photographic waterfowl surveys, Izembek Lagoon, Alaska, 2017-2019. U.S. Geological Survey software release, https://doi.org/10.5066/P9HNU1WE

DataID: 484 | doi:10.5066/P9UHP1LE | Date Posted Online: 2022-06-30 | Last Updated: 2022-06-30 13:00:47

This metadata document describes the data contained in the "processedData" folder of this data package. This data package contains all data collected by the Argos System from 85 satellite transmitters attached to Long-tailed Ducks on their breeding range in arctic and western Alaska, 1998-2005. The raw data were processed to accomplish two goals: flag implausible location estimates and decode raw sensor data. Three Comma Separate Value (CSV) tables are included in the "processedData" folder of this data package: 1) the "diag_filteredLocations" table contains one record for every Argos location estimate collected, accompanied by a binary flag that denotes an algorithm's plausibility check (based on distance, turning angle, and rate thresholds). Each record also includes a 'Tracking_Status' variable that denotes whether the location was collected from a live animal, a dead animal, or shed transmitter, 2) the "decodedSensor" table contains decoded sensor data such as the transmitter's temperature, battery voltage, and motion (activity), and 3) the "deploymentAttributes" table contains one record for each transmitter deployment in a CSV formatted table. The deployment attributes file contains information such as when the transmitter was attached to the animal, when tracking of a live animal ended, and a variety of variables describing the animal and transmitter. This table is identical to the "deploymentAttributes" table in the "rawData" folder of this data package.

DataID: 485 | doi:10.5066/P95B6K20 | Date Posted Online: 2022-06-30 | Last Updated: 2022-06-30 14:11:40

Coastal waters of southwestern Alaska the Baja California Peninsula, Mexico contain extensive beds of seagrass (eelgrass: Zostera marina and widgeongrass: Ruppia marina). Provided here are vector and raster geospatial datasets that characterize the distribution of seagrass, seaweeds, and other coastal habitats in waters adjacent to five National Wildlife Refuges in Alaska (Togiak, NWR, Izembek NWR, Alaska Peninsula-Becharof NWR, Alaska Maritime NWR, and Yukon Delta NWR) and five bays along the west coast of the Baja California Peninsula (Bahia San Quintin, Laguna Ojo de Liebre, Estero Coyote, Laguna San Ignacio, and Estero San Juanito). These data were derived from ortho-rectified aerial photo imagery and satellite imagery (Landsat 5 TM, Landsat 7 ETM+, Ikonos-2, and Quickbird-2).

DataID: 487 | doi:10.5066/P9WEK4JI | Date Posted Online: 2022-06-30 | Last Updated: 2022-10-11 16:20:12

This metadata document describes the data contained in the "rawData" folder of this data package. This data package contains all data collected by the Argos System from 85 satellite transmitters attached to Long-tailed Ducks on their breeding range in arctic and western Alaska, 1998-2005. Five data files are included in the "rawData" folder of this data package. Two data files (with identical content) contain the raw Argos DIAG (Diagnostic) data, one in the legacy verbose ASCII format and one in a tabular Comma Separate Value (CSV) format. Two other data files (with identical content) contain the raw Argos DS (Dispose) data, one in the legacy verbose ASCII format and one in a tabular CSV format. The fifth file, "deploymentAttributes", contains one record for each transmitter deployment in a CSV formatted table. The deployment attributes file contains information such as when the transmitter was attached to the animal, when tracking of a live animal ended, and a variety of variables describing the animal and transmitter. This table is identical to the "deploymentAttributes" table in the "processedData" folder of this data package.

DataID: 486 | doi:10.5066/P95B6K20 | Date Posted Online: 2022-06-30 | Last Updated: 2022-06-30 14:11:43

This metadata document describes the data contained in the "processedData" folder of this data package. This data package contains all data collected by the Argos System from 921 satellite transmitters attached to adult Pacific walruses in the Bering and Chukchi Seas, in U.S. and Russian waters, 1988-2019. The raw data were processed to accomplish two goals: flag implausible location estimates and decode raw sensor data. Very few transmitters (n=5) also carried GPS receivers. Because the GPS locations were communicated through the Argos System, a time series of Argos (Doppler) tracking data for those 5 transmitters also exists and is included. Four Comma Separate Value (CSV) tables are included in the "processedData" folder of this data package: 1) the "GPS_filteredLocations" table contains one record for every GPS location obtained, accompanied by a binary flag that denotes an algorithm's plausibility check (based on a speed threshold of 35 m/s); 2) the "diag_filteredLocations" table contains one record for every Argos location estimate collected, accompanied by a binary flag that denotes an algorithm's plausibility check (based on distance, turning angle, and rate thresholds). Each record in both the GPS and Argos filtered-location tables also includes a 'Tracking_Status' variable that denotes whether the location was collected from a live animal, a dead animal, or shed transmitter, 3) the "decodedSensor" table contains decoded sensor data such as the transmitter's temperature, battery voltage, and motion (activity), and 4) the "deploymentAttributes" table contains one record for each transmitter deployment in a CSV formatted table. The deployment attributes file contains information such as when the transmitter was attached to the animal, when tracking of a live animal ended, and a variety of variables describing the animal and transmitter. This table is identical to the "deploymentAttributes" table in the "rawData" folder of this data package.

DataID: 492 | doi:10.5066/F7FQ9TP6 | Date Posted Online: 2022-06-30 | Last Updated:

This metadata document describes the data contained in the "rawData" folder of this data package. This data package contains all data collected by the Argos System from 921 satellite transmitters attached to adult Pacific walruses in the Bering and Chukchi Seas, in U.S. and Russian waters, 1988-2019. Five data files are included in the "rawData" folder of this data package. Two data files (with identical content) contain the raw Argos DIAG (Diagnostic) data, one in the legacy verbose ASCII format and one in a tabular Comma Separated Value (CSV) format. Two other data files (with identical content) contain the raw Argos DS (Dispose) data, one in the legacy verbose ASCII format and one in a tabular CSV format. The fifth file, "deploymentAttributes", contains one record for each transmitter deployment in a CSV formatted table. The deployment attributes file contains information such as when the transmitter was attached to the animal, when tracking of a live animal ended, and a variety of variables describing the animal and transmitter. This table is identical to the "deploymentAttributes" table in the "processedData" folder of this data package.

DataID: 493 | doi:10.5066/F7FQ9TP6 | Date Posted Online: 2022-06-30 | Last Updated:

This data release comprises three tables containing cosmogenic beryllium-10 and aluminum-26 concentrations and related data from samples collected at four sites along the Charley River in central Alaska in 2019, prepared in 2020 at the University of Vermont (UVM), and measured at the Purdue Rare Isotope Measurement lab (PRIME) in 2021. The file "geology_siteLocations_Charley_bender_2022.csv" contains site locations in the NAD83 reference frame, and burial ages computed from raw data contained in the other files. All files are linked by the site_id field.

DataID: 483 | doi:10.5066/P9DRHQIS | Date Posted Online: 2022-05-24 | Last Updated: 2022-05-24 12:24:07

From 2017-2019, framework metallogenic studies were completed in the eastern Yukon-Tanana upland in eastern Alaska. Numerous previously undated plutons known or suspected to contain components of porphyry, epithermal, and intrusion-related gold systems and associated deposit types were sampled for age and zircon trace element determinations between the Black Mountain area and the Yukon border, north of the Tanana River and south of the Yukon River. A collection of 54 samples were collected by Douglas Kreiner (USGS, Alaska Science Center). Zircon grains were separated from each sample. The samples were examined by U-Pb analysis by laser ablation-inductively coupled plasma mass spectrometry (LA-ICP-MS) in a USGS laboratory in Denver, CO. These geochronologic data are reported in a separate USGS data release. The zircon samples were later analyzed for trace element characteristics by Douglas Kreiner using the Sensitive High Resolution Ion Microprobe with Reverse-Geometry (SHRIMP-RG) at the Stanford-USGS laboratory in Palo Alto, California. The samples represent several discrete periods of magmatic activity, ranging from 56.5-360.3 Ma. The Paleozoic ages are of host rocks that were previously unidentified and collected for regional framework geology. The bulk of analyzed samples are between 68-72 Ma. Other specific periods of mineralization range from 100-112 Ma and 180-211 Ma.

DataID: 482 | doi:10.5066/P9Q6GYMH | Date Posted Online: 2022-05-17 | Last Updated: 2022-05-19 09:59:44

This set of data files contains analyses of samples representing the Triassic Shublik and Otuk Formations in Alaska. The samples were collected from the Brontosaurus 1 well and measured stratigraphic sections at Surprise Creek and Cape Lisburne. The data set includes total organic carbon (TOC), Rock-Eval (Tmax) data, geochemical data from inductively coupled plasma-optical emission spectroscopy-mass spectroscopy (ICP-OES-MS) and X-ray diffraction (XRD), U-Pb zircon ages, and spectral gamma ray profiles. The data presented here are described and interpreted in a paper titled Biosiliceous, Organic-rich, and Phosphatic Facies of the Triassic in Northwest Alaska: Transect across a High-latitude, Low-angle Continental Margin.

DataID: 481 | doi:10.5066/P924FY7V | Date Posted Online: 2022-05-09 | Last Updated:

This data release contains whole rock major and trace element data for 399 igneous and sedimentary rock samples collected from the Western Alaska Range between 1968 and 2014 and funded by the Mineral Resources Program of the U.S. Geological Survey. All materials were analyzed by ALS Global, between 2014 and 2018, by a range of different techniques, so multiple unique entries for a given element relate to different analytical methods or preparations, as detailed in accompanying metadata. Some legacy samples were analyzed for trace elements only, with major elements and legacy trace element analyses for these appearing in Granitto et al. (2019a, 2019b).

DataID: 480 | doi:10.5066/P99EUXTS | Date Posted Online: 2022-05-05 | Last Updated:

This data set describes nuclear microsatellite genotypes derived from 17 autosomal loci (Sug001, Sug002, Sug003, Sug006, Sug007, Sug008, Sug009, Sug010, Sug011, Sug012, Sug019, Sug021, Sug022, Sug023, Sug024, Sug029, Sug038) in shrews, Sorex spp.

DataID: 478 | doi:10.5066/P9DJQFH8 | Date Posted Online: 2022-05-04 | Last Updated:

This dataset is in five tables with data from ecophysiological studies of free-ranging polar bears of the Southern Beaufort Sea subpopulation. They were equipped with high-resolution activity sensors, body temperature loggers, and GPS satellite-telemetry collars, to compare physiological state and activity of bears during natural behavior with that experienced by bears during helicopter recapture events (n = 14 bears). The data include: rectal temperatures for comparison to temperatures recorded by implanted loggers, levels of blood biochemical markers (n = 50 bears) related to elevated body temperature and stress for testing whether these markers were influenced by the duration of helicopter operations, ambient temperature, and dose of the immobilization drug.

DataID: 475 | doi:10.5066/P9OKOCN1 | Date Posted Online: 2022-04-29 | Last Updated: 2022-04-29 12:05:42

This data set contains a list of geologic station localities on St. Lawrence Island, Alaska, from which thin section samples were examined. The data set also contains U-Pb isotopic data and ages of detrital zircon (DZ) from sedimentary rocks collected on St. Lawrence Island and in the western Brooks Range. All St. Lawrence Island samples (DZ and thin sections) were collected by U.S. Geological Survey (USGS) geologists during geologic mapping in the 1970s. DZ samples from the Brooks Range were collected as part of regional geological mapping programs by the USGS and the Alaska Division of Geological and Geophysical Surveys. Detrital zircon grains were obtained from samples of sedimentary rocks to determine depositional age and sediment sources. The data tables accompanying this data release report the isotopic composition of uranium (U) and thorium (Th) measured in each grain, ratios of two isotopes of lead (207Pb and 206Pb) and two isotopes of uranium (235U and 238U), and the age of each grain.

DataID: 476 | doi:10.5066/P99PILIK | Date Posted Online: 2022-04-29 | Last Updated: 2022-04-29 12:05:45

This dataset consists of the complete set of aerial imagery and data from walrus haulouts collected by unoccupied aerial system (UAS) surveys near Pt. Lay, Alaska, during the autumns of 2018 and 2019. The data include: 1) georeferenced digital aerial imagery and flight logs from UAS surveys, and 2) orthoimages derived from the aerial imagery and flight logs by standardized structure from motion algorithms.

Because these high resolution images are considered sensitive, they are archived at the U.S. Geological Survey, Alaska Science Center (a USGS Trusted Digital Repository) and only the metadata describing the data set is publicly accessible. However, data derived from these images are available through a related data release: Fischbach et al. (2021).

DataID: 477 | doi:10.5066/P9X1C0WX | Date Posted Online: 2022-04-29 | Last Updated: 2022-04-29 12:00:25

This data package presents raw legacy data collected during 1974-1992 on the Arctic Coastal Plain (primarily in the National Petroleum Reserve - Alaska; NPR-A). The data were collected in support of a long-term multi-species wetland ecosystem study that aimed to provide an understanding of occurrence and densities of bird, mammal, fish, invertebrate, and plant species. The study included the Teshekpuk Lake Special Area (TLSA), as well as focused studies on individual lakes or regions within the special area, including: East Long Lake, West Long Lake, Goose Lake, Island Lake, Square Lake, Meade River (Singiluk), Point Storkersen, and Icy Cape. The study included 10 primary objectives: 1) complete daily weather records, 2) chart avian phenology, 3) census large and small bird species, 4) map bird nests and record success, 5) record caribou movements, 6) sample wetlands for aquatic macroinvertebrates, 7) establish a small mammal trapline, 8) observe activity and feeding habits of molting geese, 9) map vegetation trend plots for ground truth, and 10) record fox observations and den sites. Not all objectives were completed in all years and at all locations.

The data are provided as digital scans (PDF format for documents and JPG format for photographs) of original field data sheets, notebooks, tables, figures, maps, and photographs (scanned film and slides). All data are organized in folders by topic and study site location.

Since the data are in original form and were not digitized at the time of data collection, the data have not undergone formal Quality Assurance/Quality Control (QA/QC). Additional documentation of project field methods are limited for most years and locations of study, however, reports summarizing data collected at several locations are listed in the Cross Reference section. These are scanned originals and replications and some text may be illegible.

About the Legacy Data Collection

The Teshekpuk Lake region was designated as a Special Area in 1977 by the Secretary of the Interior, Cecil Andrus. The map shows the approximate boundary of the Special Area in 2008, 2013, and 2020. Due to differences in reporting procedures prior to 2000, the boundaries of Teshekpuk Lake Special Area were not well defined and therefore, are not shown on this map.

Between 1974-1992, biologists with the USFWS Special Studies Program (precursor to USFWS Alaska Region departments and ultimately the Ecosystems Office at the USGS) collected biological and phenological information on waterbirds, mammals, and plants on the North Slope of Alaska within the National Petroleum Reserve-Alaska (NPR-A).

This U.S. Geological Survey Data Release is a collection of original and scanned field data, field notes, maps, figures, tables, and photographs. All documents and photos have been digitally scanned in PDF or JPG format and are archived along with original physical copies at the USGS Alaska Science Center.

Data Constraints

Field data, figures, tables, maps, notes, and photographs are available for download upon request by contacting ascweb@usgs.gov. Not all research objectives were accomplished in all years and locations of these studies and therefore, some data may be missing and/or unavailable. Also, not all years of the research were conducted at a single location and data may have been combined into a single document (e.g., raw data for Large Species Surveys). Therefore, it is suggested that related documents from all locations be requested. All available data, figures, tables, maps, and field notes are in PDF document format and have not been checked for accuracy or completeness. Several documents are poor quality scans and may contain sections that are illegible. Further, all PDF documents are provided “as is” and do not follow 508 compliance standards. All photographs are archived in PDF or JPG files and include information such as the photographer’s name, location of photo and date taken, when available. Lastly, documents and photographs included in the Teshekpuk Lake Special Area section of the inventory lists (see below), includes data for all lakes within the designated area boundary. East Long Lake, West Long Lake, Goose Lake, Island Lake and Square Lake are located within the special area boundary and data related to these lakes may be contained within the overarching Teshekpuk Lake Special Area section.

Please note: All bird species checklists have been submitted to the eBird database hosted by the Cornell Lab of Ornithology (eBird.org). Checklists are also available as a data download from USGS Alaska Science Center under the “Northern” region (Bird Species Checklists from USGS Alaska Science Center Field Camps)

Collection Metadata (Zip)

Suggested Citation: U.S. Geological Survey, Alaska Science Center, 2022, Data supporting studies of waterbird and Arctic lake ecosystems within the National Petroleum Reserve-Alaska, 1974-1992: U.S. Geological Survey data release, https://doi.org/10.5066/P99Z0F3M.

Data Inventory

Teshekpuk Lake Special Area

• All Fauna
  • Birds and Mammals
    • Species Lists
      • RAW DATA: List of species observations on Lakes of Teshekpuk Special Area [1987] [1 document]
• Birds
  • All Avian Species
    • Activity
      • RAW DATA: Avian species migrations [1988] [1 document]
    • Broods
      • MAPS: Brood observations [1978] [1 document]
    • Chronology
      • NOTES: Nest monitoring including egg counts [1978] [1 document]
      • RAW DATA: Abundance and arrival dates of adults [1977, 1978[ [4 documents]
    • Habitat Use
      • NOTES: Wetland use of avian species [1978] [1 document]
    • Nests
      • RAW DATA: Nest habitat associations and nest success [1977, 1978] [3 documents]
    • Observations
      • NOTES: Related to presence/absence and nest initiation [1978] [1 document]
    • Surveys
      • MAPS: Avian census area [1978] [1 document]
  • Goose Species
    • Abundance
      • RAW DATA: Flock sizes of waterfowl [1977] [1 document]
    • Observations
      • MAPS: Daily locations of geese in the East Long Lake region [1977] [1 document]
      • NOTES: Daily goose surveys at Teshekpuk Lake Special Use Area [1978] [1 document]
      • RAW DATA: Daily goose surveys at Teshekpuk Lake Special Use Area [1978] [1 document]
    • Presence and Absence
      • ANALYSIS: Spearman Rank Test results for Brant and Canada Goose abundance [1976-1987] [2 documents]
      • FIGURES: Presence of goose species throughout June-August at Teshekpuk Lake Special Area [1977] [1 document]
      • MAPS: Goose counts [1975] [1 document]
      • TABLES: Goose species density and composition [1977] [1 document]
  • Black Brant
    • Banding
      • NOTES: New band summary [1988] [1 document]
      • RAW DATA: New banding and recapture records [1987, 1988] [4 documents]
    • Overflights
      • RAW DATA: Air traffic and Brant response in Teshekpuk Lake Special Area [1978] [1 document]
  • Loon Species
    • Nesting
      • MAPS: Nesting locations in Long Lake region [1978] [1 document]
  • Phalarope Species
    • Observations
      • RAW DATA: Presence and abundance of phalarope species [1977] [1 document]
  • Large Species
    • Species List
      • RAW DATA: Large species surveys, includes waterfowl, gulls, and raptors [1977, 1978] [2 documents]
  • Snowy Owl
    • Observations
      • RAW DATA: Abundance and home range locations of Snowy Owl [1987] [1 document]
  • Short-eared Owl
    • Observations
      • RAW DATA: Abundance and home range locations of Short-eared Owl [1988] [1 document]
  • Small Species
    • Species Lists
      • RAW DATA: Small species surveys, includes shorebirds and passerines [1977, 1978] [2 documents]
• Mammals
  • Caribou
    • Observations
      • RAW DATA: Counts of cows and calves [1977, 1978] [2 documents]
  • Arctic Fox
    • Den Sites
      • MAPS: Active and inactive fox den locations [1988] [1 document]
• Vegetation
  • Sampling
    • Collection
      • RAW DATA: Ice wedge pool habitat and plant sampling [1977, 1978] [2 documents]
    • Stratum and Cover
      • RAW DATA: Vegetation plot sampling including, species, stratum, and cover [1988] [1 document]
  • Habitat
    • Classification
      • MAPS: Classification by lake [1978] [1 document]
      • TABLES: Composition of wetland habitat across Teshekpuk Lake Special Area [1978] [1 document]
• Invertebrates
  • Sampling
    • Field and Lab
      • RAW DATA: Classification of invertebrates sampled in ponds [1977] [2 documents]
• Weather
  • Weather Conditions
    • Daily
      • RAW DATA: Daily conditions [1977, 1978] [2 documents]
• Field Notes
  • Accomplishments
    • Summaries
      • NOTES: Daily notes and accomplishments at Teshekpuk Lake Special Area [1977, 1987] [2 documents]
  • Notebooks
    • Daily Observations
      • NOTES: Daily fieldwork notes [1977] [2 documents]
• Logistics
  • Protocols
    • PROTOCOL: Fieldwork plans and general procedures [1978, 1989] [2 documents]
  • Camp
    • MAPS: Field camp locations [1977] [1 document]
• Photographs
  • Goose Survey
    • SLIDES: Numbered lakes in Teshekpuk Lake Special Area during aerial goose surveys [1978] [249 photos, 66.9 MB]
    • MAPS: Location of numbered lakes in Teshekpuk Lake Special Area [2022] [1 document]
  • Landscape
    • SLIDES: Numbered lakes in Teshekpuk Lake Special Area [1991, 1992] [56 photos, 16.5 MB]
  • Aerial Landscape
    • SLIDES: Landscape during aerial surveys [1988, 1989, 1991] [73 photos, 23.0 MB]
  • Habitat
    • SLIDES: Goose foraging habitat including erosion and overgrazing [1988, 1991, 1992] [84 photos, 49.2 MB]
  • Stratum and Cover
    • SLIDES: Plant species stratum and cover [1989] [95 photos, 52.2 MB]
  • Plants
    • SLIDES: Specific plant species [1991] [22 photos, 11.2 MB]
  • Mammals
    • SLIDES: Caribou near Kogru River [1989] [1 photo, 450 KB]
  • Goose Banding
    • SLIDES: Banding corral [1989] [1 photo, 291 KB]
  • Biologists
    • SLIDES: Biologists working in the field [1989, 1991} [3 photos, 1.01 MB]
  • Field Camp
    • SLIDES: Camp structures and landscape [1991, 1992] [13 photos, 4.83 MB]

East Long Lake

• Birds
  • Waterbirds
    • Activity
      • TABLES: Goose foraging activity [1980] [1 document]
    • Habitat Use
      • RAW DATA: Wetland use [1978] [1 document]
    • Observations
      • MAPS: Brood observations [1987] [1 document]
      • NOTES: Goose observations and chronology [1980] [2 documents]
  • Black Brant
    • Activity
      • FIGURES: Feeding duration and habitat [1980] [4 documents]
      • FIGURES: Flock activity and movements [1980] [3 documents]
      • NOTES: General activity [1980, 1987] [2 documents]
      • RAW DATA: Flock activity and movements [1980] [2 documents]
      • TABLES: Feeding duration and metabolism [1980] [2 documents]
      • TABLES: Flock activity and movements [1980] [7 documents]
    • Banding
      • FIGURES: Ninth primary growth rate [1980] [4 documents]
      • REPORTS: Banding summary [1980] [1 document]
      • TABLES: Body molt assessment [1980] [1 document]
      • TABLES: Ninth primary growth rate [1980] [2 documents]
    • Counts
      • FIGURES: Observations and counts [1980] [2 documents]
      • TABLES: Observations and counts [1980] [4 documents]
      • TABLES: Human observer schedules [1980] [1 document]
    • Habitat Use
      • FIGURES: Habitat associations [1980] [2 documents]
      • FIGURES: Transect and blind locations [1980] [1 document]
      • TABLES: Shoreline use [1980] [1 document]
  • Canada Goose
    • Observations
      • FIGURE: Presence and absence [1980] [1 document]
      • RAW DATA: Observations and activity [1980] [1 document]
  • Long-tailed Duck
    • Collection
      • RAW DATA: Specimen collection [1980] [2 documents]
    • Field Season
      • NOTES: Daily journal of activities [1980] [3 documents]
  • Large Species
    • Species Lists
      • NOTES: Peregrine Falcon observations [1987] [1 document]
• Fish
  • Whitefish
    • Sampling
      • RAW DATA: Sampling [1980] [1 document]
• Vegetation
  • Sampling
    • Ground Truthing
      • CODE: Analyses and code [1987] [6 documents]
      • MAPS: Habitat type key [1987] [2 documents]
      • NOTES: Habitat classification definitions [1987] [1 document]
      • PHOTOS: Spot ground data [1976] [15 photos]
      • RAW DATA: Habitat sampling [1987] [3 documents]
      • TABLES: Summary of ground truth [1987] [2 documents]
    • Sampling and Phenology
      • RAW DATA: Sampling of invertebrates and plants [1980] [3 documents]
      • RAW DATA: Plant phenology [1980] [1 document]
    • Sampling Transects and Plots
      • NOTES: Trend plot habitat zones and transect notes [1977, 1989] [2 documents]
      • RAW DATA: Vegetation sampling plots [1988, 1989] [10 documents]
  • Ice Extent
    • Melt Rate
      • MAPS: Ice extent [1977] [1 document]

• Weather
  • Weather Conditions
    • Daily
      • RAW DATA: Daily conditions [1980] [1 document]
      • TABLE: Daily air temperatures [1980] [1 document]
• Field Notes
  • Notebooks
    • Daily Observations
      • NOTES: Field notes and observations [1980, 1987, 1989] [3 documents]
• Logistics
  • Flight Schedules
    • Overflights
      • SUMMARIES: Proposed overflights as part of Brant disturbance study [1988] [1 document]
• Photographs
  • Wetland Classification
    • SLIDES: Wetland classification by plot and date [1988] [119 photos, 70.2 MB]
  • Habitat
    • SLIDES: General habitat photos at nearby Horseshoe Lake [1989] [6 photos, 2.69 MB]
  • Plants
    • SLIDES: Close-up plant photos at nearby Horseshoe Lake [1989] [2 photos, 529 KB]
  • Overflights
    • SLIDES: Aerial photos of East Long Lake region [1989] [54 photos, 18.4 MB]

West Long Lake

• Birds
  • All Avian Species
    • Chronology
      • MAPS: Locations of avian nests [1987] ]1 document]
      • RAW DATA: Avian arrival dates and presence/absence [1987] [2 documents]

• Vegetation
  • Sampling
    • Exclosure
      • RAW DATA: Plants sampled inside exclosures [1977] [2 documents]
    • Ground Truthing
      • CODE: Characteristics of habitat pixels [1987] [4 documents]
      • MAPS: Color key of habitat classifications [1986] [1 document]
      • RAW DATA: Plant and habitat samples [1987] [6 documents]
• Weather
  • Weather Conditions
    • Daily
      • RAW DATA: Daily ambient temperatures [1987] [1 document]
• Photographs
  • Landscape
    • SLIDES: General landscape photos [1988] [5 photos, 1.82 MB]
  • Habitat
    • SLIDES: Erosion and goose overgrazing photos [1988] [14 photos, 8.00 MB]
  • Mammals
    • SLIDES: Caribou photo [1988] [1 photo, 520 KB]

Goose Lake

• Birds
  • All Avian Species
    • Activity
      • RAW DATA: Goose species migration timing [1979] [1 document]
    • Chronology
      • RAW DATA: Goose breeding chronology and nest chronology [1979] [4 documents]
    • Feces
      • NOTES: Goose feces counts [1979] [1 document]
    • Observations
      • RAW DATA: Bird species brood observations [1979] [1 document]
  • Black Brant
    • Banding
      • FIGURES: Brant capture locations for banding [1979] [1 document]
      • RAW DATA: Brant recapture records [1979] [1 document]
  • Arctic Loon (Pacific Loon)
    • Nesting
      • MAPS: Locations of Arctic Loon nesting locations [1979] [1 document]
  • Large Species
    • Species Lists
      • RAW DATA: Large species surveys, includes waterfowl, gulls, and raptors [1979] [1 document]
  • Small Species
    • Species Lists
      • RAW DATA: Small species surveys, includes shorebirds and passerines [1979] [1 document]
• Mammals
  • Caribou
    • Observations
      • RAW DATA: Sightings of cows, calves, and bulls [1979] [1 document]

• Fish
  • Least Cisco
    • Sampling
      • RAW DATA: Measurements, stomach, and scale sampling [1979] [3 documents]
• Invertebrates
  • Aquatic
    • Sampling
      • RAW DATA: Invertebrate sampling from ice wedge ponds [1979] [1 document]
• Vegetation
  • Wetland Classification
    • Collection
      • RAW DATA: Plant collection and measurements [1979] [1 document]
    • Exclosure
      • RAW DATA: Cover of moss and sedge inside exclosure zones [1979] [4 documents]
    • Sampling
      • FIGURES: Wetland sampling to determine plant species composition [1979] [1 document]
      • RAW DATA: Wetland classification categories based on percentage of wetlands present [1979] [1 document]

• Aircraft
  • Disturbance
    • Records
      • RAW DATA: Date and type of aircraft and avian response [1979] [1 document]

• Weather
  • Weather Conditions
    • Daily
      • NOTES: Daily weather conditions at Goose Lake [1979] [1 document]
      • RAW DATA: Daily ambient temperature and conditions [1979] [1 document]
      • TABLE: Ambient temperature table for Goose Lake [1979] [1 document]
• Field Notes
  • Notebooks
    • Daily Observations
      • NOTES: Field notes and observations [1980, 1987, 1989] [3 documents]

Island Lake

• Birds
  • Goose Species
    • Observations
      • RAW DATA: Surveys of waterfowl abundance [1987] [1 document]
  • Large Species
    • Species Lists
      • RAW DATA: Large species surveys, includes waterfowl, gulls, and raptors [1978] [1 document]
  • Small Species
    • Species Lists
      • RAW DATA: Small species surveys, includes shorebirds and passerines [1978] [1 document]
• Vegetation
  • Sampling
    • Vegetation Plots
      • RAW DATA: Stratum and cover of plant species within sampling plots [1988, 1989] [4 documents]
• Field Notes
  • Notebook
    • Observations
      • NOTES: Fieldwork itinerary and end-of-season notes [1978, 1989] [2 documents]

• Photographs
  • Aerial
    • FILM/LANDSAT: General landscape photos [1978] [5 photos, 1.66 MB]
  • Habitat
    • SLIDES: Erosion and goose overgrazing photos [1988] [127 photos, 43.7 MB]
  • Wetland Class
    • SLIDES: Wetland classification [1988] [67 photos, 37.7 MB]
  • Stratum Cover
    • SLIDES: Plant species stratum and cover classification [1989] [28 photos, 15.7 MB]
  • Field Camp
    • FILM: Habitat and people near camp [1978] [6 photos, 1.84 MB]

Square Lake

• Birds
  • All Avian Species
    • Density
      • TABLES: Breeding bird density proportions [1978] [1 document]
  • Waterfowl
    • Density
      • FIGURES: Count of waterfowl presence [1978] [1 document]
  • Small Species
    • Species Lists
      • RAW DATA: Small species surveys, includes shorebirds and passerines [1978] [1 document]
• Vegetation
  • Classification
    • Habitat
      • MAPS: Habitat classification polygons [1978] [1 document]
      • NOTES: Wetland classifications by water depth and vegetation [1978] [3 documents]
    • Water Depth
      • MAPS: Indication of water depths across lakes around Square Lake [1978] [1 document]
• Logistics
  • Field Plans
    • NOTES: Itinerary of project components and people working on each project [1978] [1 document]

• Photographs
  • Habitat
    • FILM: Black and white images of Willow Creek, field camp and small bird plots [1978] [186 photos, 76.8 MB]

Meade River (Singiluk)

• Birds
  • All Avian Species
    • Activity
      • RAW DATA: Flock size and direction of flock movement [1977] [1 document]
    • Census
      • MAPS: Locations of large and small avian survey plots [1977] [4 documents]
    • Chronology
      • NOTES: Abundance and timing of avian species [1977] [1 document]
      • RAW DATA: Dates of species arrival and abundance [1977] [1 document]
  • Large Species
    • Species Lists
      • RAW DATA: Large species surveys, includes waterfowl, gulls, and raptors [1977] [1 document]
  • Small Species
    • Species Lists
      • RAW DATA: Small species surveys, includes shorebirds and passerines [1977] [1 document]
• Vegetation
  • Classification
    • Habitat
      • MAPS: Habitat classification polygons [1977] [1 document]
      • NOTES: Water conditions and pond/wetland classifications [1977] [3 documents]
      • TABLES: Water conditions and vegetation cover [1977] [1 document]

• Photographs
  • Aerial Landscape
    • FILM: Landscape surrounding the Meade River near Singiluk [1977] [16 photos, 4.28 MB]
  • Habitat
    • FILM: Habitat associated with bird surveys [1977] [191 photos, 84.2 MB]
  • Trend Plots
    • FILM: Trend plots surrounding the Meade River near Singiluk [1977] [80 photos, 33.3 MB]
  • Birds
    • FILM: Shorebird, tern and jaeger chicks and adults [1977] [8 photos, 2.23 MB]
  • Mammals
    • FILM: Caribou and bears [1977] [8 photos, 2.75 MB]
  • Field Camp
    • FILM: Field camp breakdown at the Singiluk camp [1977] [12 photos, 4.72 MB]

Point Storkersen

• Logistics
  • Flight Plan
    • Surveys
      • MAPS: Landing locations for fixed-wing aircraft [1978] [1 document]
      • NOTES: Pre-flight plan and flight log [1977, 1978] [2 documents]
  • Study Site
    • Lakes
      • MAPS: Labeled map of numbered lakes around Pt. Storkersen [1977] [1 document]
• Photographs
  • Aerial Landscape
    • FILM: Landscape from an airplane [1978] [118 photos, 42.8 MB]
  • Landscape
    • FILM: On-the-ground landscape images [1978] [78 photos, 56.1 MB]
  • Trend Plots
    • FILM: Vegetation trend plots [1978] [43 photos, 25.1 MB]
  • Wetland Classification
    • FILM: Wetland classification types [1978] [20 photos, 8.93 MB]
  • Plants
    • SLIDES: Individual plant species [1978] [13 photos, 6.44 MB]
  • Birds
    • SLIDES: Shorebird and waterfowl adults, chicks, and nests [1978] [86 photos, 47.1 MB]
  • Mammals
    • SLIDES: Caribou, Arctic fox, and lemmings [1978] [20 photos, 10.9 MB]
  • Infrastructure
    • SLIDES: Oil and gas development including gas flaring [1978] [14 photos, 5.67 MB]
  • LANDSAT
    • POSITIVES: LANDDSAT aerial imagery [1989] [1 document]

Icy Cape

• Birds
  • All Avian Species
    • Checklists
      • NOTES: Observations and counts of avian species [1980] [6 documents]
      • RAW DATA: Avian species checklists [1980] [5 documents]
    • Aerial Surveys
      • MAPS: Transects and locations of aerial surveys [1980] [7 documents]
      • RAW DATA: Avian species observed during aerial surveys [1980] [6 documents]
    • Ground Surveys
      • MAPS: Survey routes [1980] [7 documents]
      • RAW DATA: Inlet watch and tundra survey avian species data [1980] [25 documents]
      • TABLES: Average number of birds per habitat type [1980] [1 document]
    • Zodiac Surveys
      • MAPS: Route and locations of birds observed during surveys by zodiac [1980] [3 documents]
    • Metadata
      • DATA DICTIONARY: Describes species codes, behavior, and migratory codes [1980] [3 documents]
• Field Notes
  • Notebooks
    • NOTES: Field notes and observations of migration [1980] [13 documents]
• Logistics
  • Itinerary
    • NOTES: Detailed explanation of field activities and timing [1980] [1 document]
• Photographs
  • Landscape
    • SLIDES: Tundra and ocean landscape [1980] [36 photos, 12.9 MB]
  • Habitat
    • SLIDES: General habitat photos of the tundra near Icy Cape [1980] [14 photos, 11.2 MB]
  • Birds
    • SLIDES: Waterfowl flocks on the ocean [1980] [203 photos, 80.1 MB]
  • Mammals
    • SLIDES: Caribou, Arctic fox, and lemmings near Icy Cape [1980] [19 photos, 6.77 MB]
  • Biologists
    • SLIDES: Biologists conducting surveys or at the field camp [1980] [10 photos, 4.29 MB]
  • Infrastructure
    • SLIDES: Camp and town near Icy Cape [1980] [20 photos, 6.73 MB]
  • LANDSAT
    • POSITIVES: Aerial photos of the Icy Cape region [1972-1979] [2.62 MB]

Related Reports and Publications

The following is a list of documents (government reports, graduate dissertations, and peer reviewed scientific articles) that have presented or analyzed portions of the data provided in this data release. It is possible that other documents supported by these data exist but are not included in this list. Documents are available for download through ServCat (U.S. Fish and Wildlife Service; DOI agencies only) or ARLIS (Alaska Resources Library & Information Services; https://www.arlis.org/).

Bergman, R.D. 1974. Use of lakes by waterbirds in the Prudhoe Bay oilfields, 12-13 August 1974: first annual report, 1974. Unpublished report, U.S. Fish and Wildlife Service-Energy Delivery Systems, Anchorage, Alaska.

Bergman, R.D. 1974. Wetlands and waterbirds at Point Storkersen, Alaska. Ph.D. Dissertation, Iowa State University, Ames, Iowa.  https://doi.org/10.31274/rtd-180813-4752

Derksen, D.V., Jensen, M.S., and Weller, M.W. 1976. Evaluation of techniques used to study vegetation and avifauna in National Petroleum Reserve of Alaska: 1976 NPRA final report. U.S. Fish and Wildlife Service-Office of Special Studies, Anchorage, Alaska.

Derksen, D.V., Eldridge, W.D., Rothe, T.C. 1977. Waterbird populations and habitat analysis of selected sites in NPRA. Unpublished report, U.S. Fish and Wildlife Service-Office of Special Studies, Anchorage, Alaska.

Heinz, F.A., Koob, M.D. 1977. Investigations of Arctic coastal plain avifauna: 1977 Storkersen Point final report. U.S. Fish and Wildlife Service-Office of Special Studies, Anchorage, Alaska.

King, R.J. 1977. Migratory bird populations of the National Petroleum Reserve-Alaska (NPR-A) 1977. Unpublished report, U.S. Fish and Wildlife Service, Anchorage, Alaska

Metzner, K.A., Todd, C.T. 1977. Investigations of interior Arctic coastal plain avifauna in National Petroleum Reserve of Alaska: 1977 Singiluk final report. U.S. Fish and Wildlife Service-Office of Special Studies, Anchorage, Alaska.

Eldridge, W.D., Rothe, T.C. 1977.Waterbirds and wetland resources at the Meade River Delta, 1977. U.S. Fish and Wildlife Service-Office of Special Studies, Anchorage, Alaska.

Bergman, R.D., Howard, R.L., Abraham, K.F., Weller, M.W. 1977. Waterbirds and their wetland resources in relation to oil development at Storkersen Point, Alaska. U.S. Fish and Wildlife Service, Resource Publication 129. Washington, D. C. 38 pp.

King, R.J. 1978. Results of aerial surveys of migratory birds on NPR-A in 1977 and 1978. Unpublished report, U.S. Fish and Wildlife Service, Migratory Bird Program, Anchorage, Alaska.

Markon, C.J. 1978. Final report on the 1977 35mm aerial photography program in National Petroleum Reserve of Alaska. Unpublished report, U.S. Fish and Wildlife Service, Anchorage, Alaska.

Rothe, T.C., Ryan, M.R., Taylor, T.S. 1978. Waterbird populations and wetland habitats at Teshekpuk Lake study site: 1978 final report. U.S. Fish and Wildlife Service-Office of Special Studies, Anchorage, Alaska.

Derksen, D.V. 1979. Summary of Teshekpuk Lake aerial goose surveys (1976-1978). Unpublished report, U.S. Fish and Wildlife Service-Office of Special Studies, Anchorage, Alaska.

Markon, C.J. 1979. The 1978 35mm aerial photography program in National Petroleum Reserve of Alaska. Unpublished report, U.S. Fish and Wildlife Service-Office of Special Studies, Anchorage, Alaska.

Markon, C.J., Heinz, F.A. 1979. Waterbirds and their Wetland Resources at Island Lake, NPR-A, 1978. U.S. Fish and Wildlife Service-Office of Special Studies, Anchorage, Alaska.

McDonald, D., Kenyon, R.C. 1979. Waterbirds and their Wetland Resources in Relation to Oil Development at Storkersen Point, Alaska - 1978 Final Report. U.S. Fish and Wildlife Service-Office of Special Studies, Anchorage, Alaska.

Weller, M.W., Derksen, D.V. 1979. The geomorphology of Teshekpuk Lake in relation to coastline configuration of Alaska’s coastal plain. Arctic 32:152-160

Simpson, S.G. 1980. East Long Lake study site, 1980. Unpublished report, U.S. Fish and Wildlife Service-Office of Special Studies, Anchorage, Alaska.

Taylor, E.J., Simpson, S.G., Bromley, M.S. 1980. Waterbird populations and wetland habitats at Goose Lake study site 1979. Unpublished report, U.S. Fish and Wildlife Service-Office of Special Studies, Anchorage, Alaska.

Derksen, D.V., Rothe, T.C., Eldridge, W.D. 1981. Use of wetland habitats by birds in the National Petroleum Reserve-Alaska. U.S. Fish and Wildlife Service, Resource Publication 141, Washington, D.C. 31 pp.

Lehnhausen, W.A., Quinlan, S.E. 1981. Bird migration and habitat use at Icy Cape, Alaska. Unpublished report, U.S. Fish and Wildlife Service-Office of Special Studies, Anchorage, Alaska.

Simpson, S.G. 1981. Microhistological analysis of fecal materials collected from geese near Teshekpuk Lake, Alaska. Unpublished report, U.S. Fish and Wildlife Service-Office of Special Studies, Anchorage, Alaska.

Derksen, D.V., Eldridge, W.D., Weller, M.W. 1982. Habitat ecology of Pacific Black Brant and other geese moulting near Teshekpuk Lake, Alaska. Wildfowl 33:39-57.

Taylor, R.J. 1986. Foods and foraging ecology of Oldsquaws (Clangula hyemalis L.) on the Arctic coastal plain of Alaska. M.S. Thesis, University of Alaska Fairbanks, Fairbanks, Alaska.

King, R.J. 1987. Aerial waterbird surveys of the Arctic Coastal Plain, Alaska, with emphasis on waterfowl-1986. U.S. Fish and Wildlife Service, Alaska Fish and Wildlife Research Center, Anchorage, Alaska.

U.S. Fish and Wildlife Service. 1987. Potential impacts of human activities on feeding behavior, energetics, and habitats of molting Pacific Black Brant in the Teshekpuk Lake Special Area, Alaska. U.S. Fish and Wildlife Service, Alaska Fish and Wildlife Research Center, Anchorage, Alaska.

Jensen, K.C. 1990. Responses of molting Pacific Black Brant to experimental aircraft disturbance in the Teshekpuk Lake Special Area, Alaska. Ph.D. Dissertation, Texas A and M University, College Station, Texas.

Derksen, D.V., Bollinger, K.S., Esler, D., Jensen, K.C., Taylor, E.J., Miller, M.W., Weller, M.W. 1992. Effects of aircraft on behavior and ecology of molting brant near Teshekpuk Lake, Alaska: final report. U.S. Fish and Wildlife Service, Alaska Fish and Wildlife Research Center, Anchorage, Alaska.

Taylor, E.J. 1993. Molt and bioenergetics of Pacific Black Brant (Branta bernicula nigricans) on the Arctic coastal plain, Alaska. Ph.D. Dissertation, Texas A and M University, College Station, Texas.

Weller, M.W., Jensen, K.C., Taylor, E.J., Miller, M.W., Bollinger, K.S., Derksen, D.V., Esler, D., Markon, C. 1994. Assessment of shoreline vegetation in relation to use by molting Black Brant (Branta bernicla nigricans) on the Alaska coastal plain. Biological Conservation 70(3):219-225. https://doi.org/10.1016/0006-3207(94)90166-X.

Miller, M.W. 1991. A simulation model of helicopter disturbance of molting Pacific Black Brant. M.S. Thesis, Texas A and M University, College Station, Texas.

Miller, M.W., Jensen, K.C., Grant, W.E., Weller, M.W. 1994. A simulation model of helicopter disturbance of molting Pacific black brant. Ecological Modelling 73(3-4):293-309. https://doi.org/10.1016/0304-3800(94)90067-1.

Miller, M.W. 1994. Route selection to minimize helicopter disturbance of molting Pacific Black Brant: A simulation. Arctic 47(4):341-349.

Markon, C.J., Derksen D.V. 1994. Identification of tundra land cover near Teshekpuk Lake, Alaska using SPOT satellite data. Arctic 47(3):222-231.

Taylor, E.J. 1995. Molt of Black Brant (Branta bernicla nigricans) on the Arctic coastal plain, Alaska. The Auk 112(4):904-919.  https://doi.org/10.2307/4089022.

Bollinger, K.S., Derksen, D.V. 1996. Demographic characteristics of molting Black Brant near Teshekpuk Lake, Alaska. Journal of Field Ornithology 67(1):141-15.

DataID: 474 | doi:10.5066/P99Z0F3M | Date Posted Online: 2022-04-26 | Last Updated: 2022-04-29 10:20:43

This data set contains information (in three tables) with numbers and biomass of invertebrates (primarily arthropods) collected in pitfall-trap arrays and sweep-net samples on a series of plots (n = 13 total) at one coastal and one interior study site on the Seward Peninsula in northwestern Alaska during the summers of 2015 and 2016. Associated data on the horizontal cover and height of shrub vegetation at the sampling points are presented in a fourth table.

DataID: 473 | doi:10.5066/P9ADMBLN | Date Posted Online: 2022-04-20 | Last Updated: 2022-04-21 09:29:22

This dataset includes tables summarizing image information and bird counts from the aerial digital images taken over open water at Izembek Lagoon in Alaska in fall 2017-2019. These summaries list one record per image and provide the camera parameters, latitude, longitude, altitude, and automated and manual counts representing the total number of birds in each taxon (brant, white-cheeked geese, emperor geese, gulls, and other birds) identified in the image. The original images (.JPG format) and annotations are provided in an accompanying USGS data release (Weiser et al. 2022).

Related Software Release: Weiser, E.L. 2022. R scripts for analysis of fall photographic waterfowl surveys, Izembek Lagoon, Alaska, 2017-2019. U.S. Geological Survey software release, https://doi.org/10.5066/P9HNU1WE

DataID: 471 | doi:10.5066/P9ALG8MY | Date Posted Online: 2022-04-05 | Last Updated:

This dataset contains two tables comprising catch per unit effort (CPUE) data and length measurements from fish surveys conducted in the nearshore Beaufort Sea, Alaska, between 1988 and 2019. Historical data collected by the U.S. Fish and Wildlife Service (USFWS) includes fish catch and fish length data (measured from a subset of the total catch) from two eras, 1988-1991 and 2003-2005, in the eastern Beaufort Sea (Arctic National Wildlife Refuge). Similar data was collected by the U.S. Geological Survey (USGS) from a subset of the historical eastern Beaufort Sea sites and some additional central Beaufort Sea (Simpson Lagoon and Stefansson Sound) sites more recently, 2017-2019. Here we have compiled and standardized datasets from the three eras of fish surveys.

DataID: 470 | doi:10.5066/P9120X5B | Date Posted Online: 2022-03-28 | Last Updated: 2022-04-06 10:05:07

These data are in seven tables relating to surveys of eelgrass beds in Duchikthluk and Shoal Bays of Nunivak Island, Alaska. The tables provide environmental conditions, eelgrass abundance, distribution, and measurements used to estimate overall biomass. These tables also provide information on percent cover and location of eelgrass and seaweeds/bluegreen algae, biomass of eelgrass, presence and absence of selected invertebrates, and environmental conditions during the survey.

DataID: 466 | doi:10.5066/P9QI7RCQ | Date Posted Online: 2022-03-17 | Last Updated: 2022-10-18 11:59:34

These data are in seven tables relating to surveys of eelgrass (Zostera marina) and widgeongrass (Ruppia maritima) beds in embayments of the north Pacific coast of Baja California, Mexico. The tables provide environmental conditions, eelgrass and widgeongrass abundance, and measurements used to estimate their aboveground biomass. These tables also provide information on percent cover, location, and tide height of eelgrass, widgeongrass and seaweeds, and water conditions during the survey.

DataID: 467 | doi:10.5066/P9H4LBP3 | Date Posted Online: 2022-03-17 | Last Updated: 2023-04-26 10:12:09

Estimates of the magnitude and frequency of floods are needed for engineering design of transportation and water-conveyance structures, flood-insurance studies, flood-plain management, and other water-resource purposes. In 2016, the U.S. Geological Survey estimated flood frequency and magnitude for selected streamgages in Alaska and conterminous basins in Canada and developed methods for estimating flood frequency and magnitude at ungaged streams (Curran and others, 2016). More current estimates of flood frequency are often needed for water-resource purposes, including estimating the annual exceedance probability of an observed flood peak.

DataID: 468 | doi:10.5066/P9IZB7HH | Date Posted Online: 2022-03-17 | Last Updated: 2022-03-17 17:05:35

This dataset provides clam species abundance and size data from intertidal and subtidal mixed sediment habitats in Glacier Bay National Park and Preserve (GBNPP). Data are provided for all observed clams, horse mussels, or urchins 14 mm or larger. Sampling involved excavating 25 cm of substrate from quadrats (approximately 0.25 sq meter) along transects at random and selected sites, 10 quadrats at the 0 Mean Lower Low Water (MLLW) tide level for intertidal sampling and 20 quadrats at approximately 9 m depth for subtidal sampling. Site and taxonomic information are provided. Abundance and size data are provided in two tables with different data configurations: (1) a compact version with data for those species observed (and indicators of completely empty quadrats) and (2) a 'zero-populated' version that includes indicators of abundance (including zeros) for all possible year, site, quadrat, species, and size class combinations.

DataID: 465 | doi:10.5066/P9LODH0Z | Date Posted Online: 2022-03-15 | Last Updated: 2022-05-11 14:17:00

Rhenium-osmium (Re-Os) geochronology of molybdenite provides a tool to directly date mineralizing events in hydrothermal systems. In the Yukon-Tanana upland of eastern Alaska, numerous molybdenite-bearing porphyry occurrences are recognized. The deposits are related to middle and Late Cretaceous granitoids (Kreiner and others, 2019; 2020). Some of the porphyry districts have multiple superimposed igneous events with relative timing relationships observed through detailed mapping and core logging. These timing relationships indicate multiple pulses of copper and molybdenite mineralization. This study dated molybdenite-bearing veins from porphyry occurrences across eastern Alaska. This includes five samples from the Taurus district, which attempted to directly date mineralization in an effort to understand which of the seven magmatic pulses was the main cause of mineralization.

DataID: 464 | doi:10.5066/P972SF7V | Date Posted Online: 2022-02-22 | Last Updated:

This dataset includes four tables with isotopic data and ages for selected igneous bedrock samples collected in 2001 through 2003 from the Western Alaska Range, southcentral Alaska: (1) the concentration of uranium (U) and thorium (Th), ratios of multiple isotopes of lead (Pb) and U, and the age of multiple analytical aliquots, or fractions, of zircon for each sample; (2) the 40Ar/39Ar analytical data and interpreted ages for each rock sample; (3) the sample location, rock characteristics, and interpreted ages for each sample; (4) a data dictionary table, provided as a reference guide for the user.

DataID: 463 | doi:10.5066/P92ZOY4D | Date Posted Online: 2022-02-18 | Last Updated: 2022-03-08 16:14:13

This dataset consists of three tables related to abundance and distribution of northern sea otters (Enhydra lutris kenyoni) in lower Cook Inlet, Alaska, based on data collected during a series of population-wide aerial surveys in May 2017. The dataset consists of: (1) sea otter counts along strip transects, (2) sea otter counts in Intensive Search Unit (ISU) within the transects, and (3) Transect coordinates.

DataID: 460 | doi:10.5066/P9Q4DA3T | Date Posted Online: 2022-01-28 | Last Updated:

Author(s): Haeussler, P. J.; Praet, N.; Vandekerkhove, E.; Vandorpe, T.; Van Daele, M.; De Rycker, K.; Witter, R. C.; Labay, K. A.; Moernaut, J.; De Batist, M.

DataID: 456 | doi:10.5066/P9GK6YZG | Date Posted Online: 2022-01-24 | Last Updated: 2022-01-24 10:46:02

This dataset contains U-Pb isotopic data and associated ages of zircon grains from 27 sedimentary samples and one volcanic ash sample from the Cretaceous Torok and Nanushuk Formations. Seven samples were collected from outcrop and 21 samples were collected from archived core material from oil exploration wells on the North Slope of Arctic Alaska. Zircon grains were analyzed at the University of California, Santa Barbara (UCSB) between 2013 and 2018 using laser-ablation inductively coupled plasma mass spectrometry (LA-ICPMS) techniques. The study was funded by the Energy Resources Program of the U.S. Geological Survey (USGS).

DataID: 452 | doi:10.5066/P9F8BHTN | Date Posted Online: 2022-01-21 | Last Updated:

This dataset is a new Digital Elevation Model (DEM) using the best available high-resolution topography and bathymetry surrounding the area of Whittier, Alaska. We utilized three datasets (1) LiDAR topography collected by the Alaska Division of Geological and Geophysical Surveys (DGGS) in 2012, (2) multibeam echosounder system (MBES) survey of western Passage Canal collected by the USGS in the summer of 2011 (3) and NOAA single-beam soundings collected from September 26-October 18, 1995.

DataID: 453 | doi:10.5066/P9L0Q0AK | Date Posted Online: 2022-01-21 | Last Updated: 2022-01-21 15:25:54

This dataset is from surveys for the abundance and distribution of eelgrass and seaweeds that were made at six embayments and two offshore islands at the southwestern end of the Alaska Peninsula in August-September 2012. The five tables provide information on percent cover and location of eelgrass and seaweeds, presence and absence of selected invertebrates, locations of eelgrass genetic samples, and environmental conditions within surveyed sites.

DataID: 451 | doi:10.5066/P9K1ZOMY | Date Posted Online: 2022-01-19 | Last Updated: 2022-10-18 12:02:23

This dataset is comprised of three tables showing the reaction of walruses hauled out on sea ice of the Chukchi Sea to overflights by rotary wing Unoccupied Aircraft Systems (UAS). Data include behavior of walruses before, during, and after overflights, and environmental conditions during flights.

DataID: 450 | doi:10.5066/F7DB7ZWP | Date Posted Online: 2022-01-18 | Last Updated: 2022-01-19 09:52:27

This data release provides bathymetry data for the western part of Passage Canal, near Whittier Alaska. It was collected by the USGS Pacific Coastal and Marine Science Center in 2011 under Field Activity Number A0111GA. The data release consists of a 5 m grid, derived from processed and cleaned multibeam data. Depths were corrected for tidal variations and calculated using conductivity, temperature, and depth profiles collected during the survey.

DataID: 449 | doi:10.5066/P9458THH | Date Posted Online: 2022-01-12 | Last Updated:

These morphometric data are in two tables from surfbirds (adults and chicks) captured at two locations in southcentral Alaska, 1997-1999.

DataID: 448 | doi:10.5066/P9VDI8RZ | Date Posted Online: 2022-01-04 | Last Updated:

This data set is one table with observations of polar bears located during aerial surveys along the coast and barrier islands of the southern Beaufort Seas during fall, 2010-2013. Survey flights were conducted using A-Star B2 and Bell 206 helicopters at an average altitude of 300 feet AGL and an average speed of 50 miles per hour. Survey crews searched for polar bears using coastal and inland transects and over-flights of all coastal barrier islands.

DataID: 446 | doi:10.5066/F74Q7S6Z | Date Posted Online: 2021-12-31 | Last Updated: 2021-12-30 10:43:42

This dataset provides one table of bioenergetic and morphological measurements of Pacific blue mussels (Mytilus trossulus; N = 444) collected at three intertidal sites in Kenai Fjords National Park, Alaska. Mussels were collected at the same tidal height across all three sites on a nearly monthly basis from 2014-2015.

DataID: 447 | doi:10.5066/P9N3XS5C | Date Posted Online: 2021-12-31 | Last Updated:

These data are a compilation of geographically widespread observations of premature mortality in Pacific salmon across their range in Alaska in 2019. Premature mortality observations primarily spanned an area of western and southcentral Alaska that is approximately one million km2 and included all five species of Pacific salmon. Observations were obtained and compiled in a single database from four sources including reports to a citizen science reporting network (LEONetwork.org), from Alaska Department of Fish and Game's Arctic-Yukon-Kuskokwim region by community members or staff, traditional media and social media, and directed emails by the lead author. Occasional observations of species other than Pacific salmon were obtained during this effort and were included in the database.

DataID: 439 | doi:10.5066/P920AL34 | Date Posted Online: 2021-12-14 | Last Updated: 2022-01-03 12:24:36

This data release contains multiple tables with information on avian demographics collected at the Colville River Delta, Alaska, 2011-2018. Researchers with the U.S. Geological Survey began studying the reproductive ecology of birds at a site on the Colville River near the Beaufort Sea coast in 2011. Researchers monitored the nests of geese, shorebirds, and landbirds at this study site, determining basic information like arrival dates, nest initiation date, clutch size, hatching success, and rates of chick growth. This release also contains first arrival observations of birds collected by Jim and Teena Helmericks from 1960-2019 at their house located ~15 km northeast of the USGS field camp.

DataID: 443 | doi:10.5066/P9CDID03 | Date Posted Online: 2021-12-14 | Last Updated: 2021-12-14 11:47:38

This data release contains two tables with information on seasonal values for temperature, wind, and snow cover collected at the Colville River Delta, Alaska, 2011-2018. Researchers with the U.S. Geological Survey used an on-site weather station to automatically record the temperature and speed and direction of the wind across the duration of their field season. Researchers also established permanent plots that they visited to record the percent cover of snow from their arrival at the site each spring until all snow had melted.

DataID: 444 | doi:10.5066/P9UE2Q73 | Date Posted Online: 2021-12-14 | Last Updated: 2021-12-14 11:47:41

This data release contains information on the seasonal diversity and abundance of arthropods collected at the Colville River Delta, Alaska, 2011-2012 and 2014-2107. Researchers with the US Geological Survey began studying the reproductive ecology of birds at a site on the Colville River near the Beaufort Sea coast in 2011. Researchers concurrently collected arthropods at 3-day intervals to understand the relationship between the seasonal abundance of arthropods and the reproductive output of insectivorous birds.

DataID: 445 | doi:10.5066/P9AMSIEJ | Date Posted Online: 2021-12-14 | Last Updated: 2021-12-14 11:47:44

This dataset provides an orthorectified aerial photo mosaic and a digital elevation model derived from airborne fodar data acquired in 2021 on August 31 over the Totatlanika River in central Alaska. The term "fodar" is a portmanteau of foto and lidar, coined by Matt Nolan, which describes a method of quantifying the color and elevation of Earth’s surface via airborne small-format digital camera photography.

DataID: 442 | doi:10.5066/P9K7CFRI | Date Posted Online: 2021-12-13 | Last Updated: 2021-12-14 15:08:45

This dataset consists of three tables related to abundance and distribution of northern sea otters (Enhydra lutris kenyoni) in western Prince William Sound, Alaska, based on data collected during a series of population-wide aerial surveys in June 2017. The dataset consists of: (1) sea otter counts along strip transects, (2) sea otter counts in Intensive Search Unit (ISU) within the transects, and (3) Transect coordinates.

DataID: 437 | doi:10.5066/P9KNKOG1 | Date Posted Online: 2021-12-01 | Last Updated:

This dataset consists of three tables related to abundance and distribution of northern sea otters (Enhydra lutris kenyoni) near the outer Kenai Peninsula, Alaska, based on data collected during a series of population-wide aerial surveys in June 2019. The dataset consists of: (1) sea otter counts along strip transects, (2) sea otter counts in Intensive Search Unit (ISU) within the transects, and (3) Transect coordinates.

DataID: 438 | doi:10.5066/P9TTJVBC | Date Posted Online: 2021-12-01 | Last Updated: 2021-12-01 10:32:47

These are geospatial data that characterize the distribution of polar bear denning habitat on the National Petroleum Reserve–Alaska (NPR-A), the 1002 Area of the Arctic National Wildlife Refuge and the coastal plain of northern Alaska between the Colville River and the Alaska/Canada border.

DataID: 436 | doi:10.5066/F7DJ5DXT | Date Posted Online: 2021-11-29 | Last Updated: 2021-11-29 16:00:24

These were data collected from polar bears from the Southern Beaufort Sea during the spring between 2007 and 2014. Data include individual ID, capture date, sex and age class, whether individuals visited bowhead whale carrion sites, exposure status relative to five pathogens, and concentrations of certain persistent organic pollutants.

DataID: 433 | doi:10.5066/F78P5Z0G | Date Posted Online: 2021-11-29 | Last Updated: 2021-11-29 12:40:04

This dataset contains measurements of oxygen consumption and carbon dioxide production of 3 adult female walruses (Odobenus rosmarus divergens) while resting and diving at the Oceanografic Aquarium in Valencia, Spain. Oxygen consumption and carbon dioxide production was measured for walruses via a respiratory dome while resting at the water surface and after swimming and diving.

DataID: 432 | doi:10.5066/P9UQVFSW | Date Posted Online: 2021-11-16 | Last Updated: 2022-07-22 14:43:03

This data set includes 15-minute interval data on stream temperature, stage, and discharge from an upstream and downstream gaging location on West Twin Creek, a first-order tributary to Nome Creek in the White Mountains of Alaska.

DataID: 431 | doi:10.5066/P946B22H | Date Posted Online: 2021-11-15 | Last Updated: 2021-11-15 09:42:56

These data are in nine tables relating to surveys of eelgrass beds in Izembek and Kinzarof Lagoons, Izembek National Wildlife Refuge, Alaska. The tables provide environmental conditions, eelgrass abundance, distribution, and measurements used to estimate overall biomass.

DataID: 429 | doi:10.5066/P9ZUDIOH | Date Posted Online: 2021-10-08 | Last Updated: 2023-04-14 13:52:42

This dataset comprises four tables containing channel survey cross section data, field observations including channel width and bank material, measured surface water velocity, and alluvial grain size data collected along the North Fork Fortymile River near a man-made meander cutoff called The Kink. The data release also contains eight field photos used to obtain grain size distribution; four photos annotated with measured grains linked to the grain size data table by the fields "meas" and "img."

DataID: 428 | doi:10.5066/P94TE5C8 | Date Posted Online: 2021-10-06 | Last Updated: 2021-10-07 10:05:08

This dataset consists of three tables related to abundance and distribution of northern sea otters (Enhydra lutris kenyoni) in northern and eastern Prince William Sound, Alaska, based on data collected during a series of population-wide aerial surveys in June 2014. The dataset consists of: (1) sea otter counts along strip transects, (2) sea otter counts in Intensive Search Unit (ISU) within the transects, and (3) Transect coordinates.

DataID: 426 | doi:10.5066/P9OG6SR5 | Date Posted Online: 2021-09-24 | Last Updated: 2021-09-26 18:05:22

This dataset consists of one table with predicted locations of adult female polar bears. Locations were derived by a Continuous Time-Correlated Random Walk (CTCRW) model using satellite tracking radio-collared adult female polar bears captured and instrumented in the southern Beaufort Sea, 1986–2016.

DataID: 427 | doi:10.5066/F7SN071N | Date Posted Online: 2021-09-24 | Last Updated: 2021-09-26 18:28:52

This metadata document describes the data contained in the "rawData" folder of this data package. This data package contains all data collected by the Argos System from 167 satellite transmitters attached to Common Eiders on their breeding range in arctic and western Alaska, 2000-2008. Five data files are included in the "rawData" folder of this data package. Two data files (with identical content) contain the raw Argos DIAG (Diagnostic) data, one in the legacy verbose ASCII format and one in a tabular Comma Separate Value (CSV) format. Two other data files (with identical content) contain the raw Argos DS (Dispose) data, one in the legacy verbose ASCII format and one in a tabular CSV format. The fifth file, "deploymentAttributes", contains one record for each transmitter deployment in a CSV formatted table. The deployment attributes file contains information such as when the transmitter was attached to the animal, when tracking of a live animal ended, and a variety of variables describing the animal and transmitter. This table is identical to the "deploymentAttributes" table in the "processedData" folder of this data package.

DataID: 424 | doi:10.5066/P9JH3EXV | Date Posted Online: 2021-09-23 | Last Updated: 2021-09-23 14:51:15

This metadata document describes the data contained in the "processedData" folder of this data package. This data package contains all data collected by the Argos System from 167 satellite transmitters attached to Common Eiders on their breeding range in arctic and western Alaska, 2000-2008. The raw data were processed to accomplish two goals: flag implausible location estimates and decode raw sensor data. Three Comma Separate Value (CSV) tables are included in the "processedData" folder of this data package: 1) the "diag_filteredLocations" table contains one record for every Argos location estimate collected, accompanied by a binary flag that denotes an algorithm's plausibility check (based on distance, turning angle, and rate thresholds). Each record also includes a 'Tracking_Status' variable that denotes whether the location was collected from a live animal, a dead animal, or shed transmitter, 2) the "decodedSensor" table contains decoded sensor data such as the transmitter's temperature, battery voltage, and motion (activity), and 3) the "deploymentAttributes" table contains one record for each transmitter deployment in a CSV formatted table. The deployment attributes file contains information such as when the transmitter was attached to the animal, when tracking of a live animal ended, and a variety of variables describing the animal and transmitter. This table is identical to the "deploymentAttributes" table in the "rawData" folder of this data package.

DataID: 425 | doi:10.5066/P9JH3EXV | Date Posted Online: 2021-09-23 | Last Updated: 2021-06-25 10:54:49

These data are in nine tables relating to three species of arctic breeding geese studied on the Colville River Delta, Alaska, 2011-2014. The tables provide: 1-2) spring migration and arrival dates, 3) pre-nesting intervals, 4) nest initiation dates, 5) goose esophageal contents, 6) egg stable isotope ratios, 7) goose tissue stable isotope ratios, 8) forage plant stable isotope ratios, and 9) egg endogenous reserve estimates.

DataID: 423 | doi:10.5066/F76M3643 | Date Posted Online: 2021-09-13 | Last Updated:

Data sets containing: (1) sample collection and influenza A virus (IAV) screening information for wild ducks, (2) water temperature data from four wetlands within the Izembek National Wildlife Refuge in Alaska, USA (3) water quality measurement from four wetlands within the Izembek National Wildlife Refuge in Alaska, USA, (4) genetic sequence data for IAVs recovered from replicate samples of wild ducks.

DataID: 422 | doi:10.5066/P98L6ASV | Date Posted Online: 2021-08-30 | Last Updated: 2022-10-18 11:39:46

These data are in three folders of Keyhole Markup Language (KML) geospatial polygons representing the outlines of walrus herds apparent in satellite imagery. Each KML file contains one or more geospatial polygons of walrus herd outlines created by one observer who visually interpreted the images. The attribute values from all KML files are collected in a CSV table included with this data package.

DataID: 421 | doi:10.5066/P9S2UL7N | Date Posted Online: 2021-08-26 | Last Updated:

These were data collected from polar bears from the Southern Beaufort Sea during the spring between 2013 and 2015. Data include individual identification, demographic characteristics, year, status for the current and prior year regarding use of land, concentrations of stress response and reproductive hormones, blood-based biomarker measures indicative of fasting, body mass index, and body condition. These data were used to assess factors influencing variation in measures of innate immunity, physiological stress, and concentrations in stress-response and reproductive hormones in polar bears.

DataID: 420 | doi:10.5066/F7F76BDV | Date Posted Online: 2021-08-25 | Last Updated: 2021-08-25 12:34:32

This dataset provides two tables of blood parasite infection data collected from Emperor Geese (Anser canagicus) on Yukon-Kuskokwim Delta, Alaska, 2006-2016. Three genera of blood parasites (Leucocytozoon, Haemoproteus, Plasmodium) were detected by molecular sequencing of a 479 bp fragment of the Cytochrome-b gene. The data provided in the tables are: 1) age, sex, mass, infection status, and NCBI GenBank accession numbers of the DNA sequences obtained from infected blood samples, and 2) encounter history survival data.

DataID: 419 | doi:10.5066/P9B5JUBW | Date Posted Online: 2021-08-24 | Last Updated:

These data are in one table of variables that potentially influenced the immediate post-release survival of spectacled eiders (Somateria fischeri) from the Colville River Delta, Alaska marked with coelomically implanted satellite transmitters with percutaneous antennae in 2010 and 2011.

DataID: 418 | doi:10.5066/P9HBK6P0 | Date Posted Online: 2021-08-18 | Last Updated:

This dataset provides walrus haulout group outlines, systematic grids cast over the outlines, and digitized points at the centroids of the individual walruses identified inside a randomly selected subset of grid cells. These data are based on visual interpretation of unpublished imagery from 26 aerial surveys by an Unoccupied Aerial System (UAS) operated by the U.S. Geological Survey, Alaska Science Center over large groups of walruses resting onshore near Point Lay, Alaska during the autumns of 2018 and 2019.

DataID: 417 | doi:10.5066/P959H1EH | Date Posted Online: 2021-07-14 | Last Updated: 2021-08-02 09:22:55

This data release contains one table which includes the concentration of cortisol from polar bear (Ursus maritimus) hair and morphometric data from some of the captured bears. We assayed concentration of cortisol in hair (HCC) from polar bears captured in the Alaska Beaufort, Bering and Chukchi seas during 1983-1989 and 2004-2016. Fields include the individual polar bear identifier (bearID), the date (sampleDate) and time (sampleTime) of sample collection, location that the sample was collected (latitude and longitude), agency that collected the sample (agency), sex of the polar bear (sex), the age of the polar bear at the time of sample collection (bearAge), categorical indicator of the age of the bear from which the sample was collected (ageCode), categorical indicator of the age of accompanying dependent young (cubAgeClass), the age and reproductive status of the bear at year-1 (reproClass), straight-line body length (SLBL), corrected straight-line body length (correctedSLBL), heart girth (girth), body mass (mass), and concentration of cortisol (cortisolAssay_pg_mg), and morphometric data for some of the bears captured.

DataID: 416 | doi:10.5066/P9RP5KJP | Date Posted Online: 2021-07-13 | Last Updated: 2021-08-02 09:22:52

This is a single table containing measures of the amount of fat and meat consumed by 4 adult female and 5 adult male polar bears in U.S. zoos when provided both food sources ad libitum for 12-14 days. Trial length was intended to be 14 days, but trial dietary items ran out for two bears prior to the end of the trial (i.e., at 12 and 13 days instead of 14 days). The data set includes the weight of each bear at the beginning and end of the trial and the dry matter, protein, lipid, and energy content of the meat provided in the trials. Fat was considered to be 100% dry matter and 100% lipid.

DataID: 415 | doi:10.5066/P9W7MP0T | Date Posted Online: 2021-07-12 | Last Updated: 2021-08-02 09:22:50

This data release supports the paper titled, "Tungsten skarn potential of the Yukon-Tanana Uplands, Eastern Alaska, USA-A mineral resource assessment", published via open-access license in the Journal of Geochemical Exploration and available at: https://doi.org/10.1016/j.gexplo.2020.106700. The data release includes GIS data that map potential for tungsten skarn mineralization in permissive tracts in the Yukon-Tanana Uplands, Eastern Alaska, along with tables listing keywords and procedures used to produce the permissive tracts and score them for mineral potential. Supplementary Data part A lists keywords used to extract permissive rock types from the Geologic Map of Alaska (Wilson et al., 2015) to generate the permissive tract for tungsten skarn. Supplementary Data part B describes the tract polishing procedures. Supplementary Data part C lists the parameters for scoring tungsten skarn mineralization potential within the permissive tract features. The GIS data are encapsulated in a file geodatabase called AK_Wskarn_tract.gdb and are also available in the shapefile and KML formats. The geodatabase contains three datasets. The polygon feature class "primary_attributes" contains the scored tungsten skarn permissive tract subdivided by National Hydrography Dataset HUC12 drainages. A related table, “qualitative_assessment” contains detailed scoring information for each feature. The point feature class "mineral_sites_ranked" contains W-bearing mineral sites pulled from the Alaska Resource Data File with additional fields added for this study. The GIS data folder also includes the Python script used to score potential. The datasets and methods are described in detail in the accompanying paper.

DataID: 414 | doi:10.5066/P9TDKQE4 | Date Posted Online: 2021-07-06 | Last Updated: 2021-08-02 09:22:45

This data set provides capture information and body size measurements of adult and gosling Greater White-fronted Geese captured at three study sites on the Arctic Coastal Plain of Alaska, 2012-2014.

DataID: 413 | doi:10.5066/P92OQ9A4 | Date Posted Online: 2021-06-29 | Last Updated: 2021-08-02 09:29:01

This data release contains the analytical results and evaluated source data files of geospatial analyses for identifying areas in Alaska that may be prospective for different types of lode gold deposits, including orogenic, reduced-intrusion-related, epithermal, and gold-bearing porphyry. The spatial analysis is based on queries of statewide source datasets of aeromagnetic surveys, Alaska Geochemical Database (AGDB3), Alaska Resource Data File (ARDF), and Alaska Geologic Map (SIM3340) within areas defined by 12-digit HUCs (subwatersheds) from the National Watershed Boundary dataset. The packages of files available for download are:

1. LodeGold_Results_gdb.zip - The analytical results in geodatabase polygon feature classes which contain the scores for each source dataset layer query, the accumulative score, and a designation for high, medium, or low potential and high, medium, or low certainty for a deposit type within the HUC. The data is described by FGDC metadata. An mxd file, and cartographic feature classes are provided for display of the results in ArcMap. An included README file describes the complete contents of the zip file.
2. LodeGold_Results_shape.zip - Copies of the results from the geodatabase are also provided in shapefile and CSV formats. The included README file describes the complete contents of the zip file.
3. LodeGold_SourceData_gdb.zip - The source datasets in geodatabase and geotiff format. Data layers include aeromagnetic surveys, AGDB3, ARDF, lithology from SIM3340, and HUC subwatersheds. The data is described by FGDC metadata. An mxd file and cartographic feature classes are provided for display of the source data in ArcMap. Also included are the python scripts used to perform the analyses. Users may modify the scripts to design their own analyses. The included README files describe the complete contents of the zip file and explain the usage of the scripts.
4. LodeGold_SourceData_shape.zip - Copies of the geodatabase source dataset derivatives from ARDF and lithology from SIM3340 created for this analysis are also provided in shapefile and CSV formats. The included README file describes the complete contents of the zip file.

DataID: 561 | doi:10.5066/P9CAM3F9 | Date Posted Online: 2021-06-24 | Last Updated: 2023-04-12 17:05:47

Data for 819 pan concentrated stream-sediment samples, nonmagnetic heavy-mineral concentrate (HMC) samples, and chemical data for 93 of HMC samples is presented in data file geology_mineralogy_geochemistry_TaylorMtns_Alaska_Wang.csv. The samples were collected in 2004-2008 as part of a reconnaissance geochemical geological survey of drainage basins mostly in the Taylor Mountains 1:250,000-scale quadrangle in southwestern Alaska. Samples were collected from first- or second-order streams, as shown on USGS 1:63,360-scale maps. The data reported here are from hand lens inspection of the panned concentrate samples in the field, microscopic examination of the non-magnetic fraction of the HMC samples in the lab, and chemical analyses by Inductively Coupled Plasma-Atomic Emission Spectrometry-Mass Spectrometry (ICP-AES-MS) of selected nonmagnetic HMC samples. Details of sample processing and analysis are provided in the supplemental document Supplemental_Info_Methods_Collection_Processing_Analytical.pdf. For citations regarding other analysis and samples collected during the survey see the references provided in supplemental documentation Supplemental_Info_Citations_Related_Datasets.pdf.

DataID: 408 | doi:10.5066/P94K1YXT | Date Posted Online: 2021-06-23 | Last Updated: 2021-06-23 15:36:28

This metadata document describes the data contained in the "rawData" folder of this data package. This data package contains all data collected by the Argos System from 47 satellite transmitters attached to Kittlitz's Murrelets captured along the north Gulf of Alaska, during May-July 2009-2015. Five data files are included in the "rawData" folder of this data package. Two data files (with identical content) contain the raw Argos DIAG (Diagnostic) data, one in the legacy verbose ASCII format and one in a tabular Comma Separate Value (CSV) format. Two other data files (with identical content) contain the raw Argos DS (Dispose) data, one in the legacy verbose ASCII format and one in a tabular CSV format. The fifth file, "deploymentAttributes", contains one record for each transmitter deployment in a CSV formatted table. The deployment attributes file contains information such as when the transmitter was attached to the animal, when tracking of a live animal ended, and a variety of variables describing the animal and transmitter. This table is identical to the "deploymentAttributes" table in the "processedData" folder of this data package.

DataID: 409 | doi:10.5066/P9MMVP9I | Date Posted Online: 2021-06-23 | Last Updated: 2021-06-25 10:54:49

This metadata document describes the data contained in the "processedData" folder of this data package. This data package contains all data collected by the Argos System from 47 satellite transmitters attached to Kittlitz's Murrelets captured along the north Gulf of Alaska, during May-July 2009-2015. The raw data were processed to accomplish two goals: flag implausible location estimates and decode raw sensor data. Three Comma Separate Value (CSV) tables are included in the "processedData" folder of this data package: 1) the "diag_filteredLocations" table contains one record for every Argos location estimate collected, accompanied by a binary flag that denotes an algorithm's plausibility check (based on distance, turning angle, and rate thresholds). Each record also includes a 'Tracking_Status' variable that denotes whether the location was collected from a live animal, a dead animal, or shed transmitter, 2) the "decodedSensor" table contains decoded sensor data such as the transmitter's temperature and battery voltage and 3) the "deploymentAttributes" table contains one record for each transmitter deployment in a CSV formatted table. The deployment attributes file contains information such as when the transmitter was attached to the animal, when tracking of a live animal ended, and a variety of variables describing the animal and transmitter. This table is identical to the "deploymentAttributes" table in the "rawData" folder of this data package.

DataID: 410 | doi:10.5066/P9MMVP9I | Date Posted Online: 2021-06-23 | Last Updated: 2021-06-25 10:54:49

This metadata document describes the data contained in the "rawData" folder of this data package. This data package contains all data collected by the Argos System from 17 satellite transmitters attached to Whooper Swans at a non-breeding site in Miyagi Prefecture, Japan, 2009. Five data files are included in the "rawData" folder of this data package. Two data files (with identical content) contain the raw Argos DIAG (Diagnostic) data, one in the legacy verbose ASCII format and one in a tabular Comma Separate Value (CSV) format. Two other data files (with identical content) contain the raw Argos DS (Dispose) data, one in the legacy verbose ASCII format and one in a tabular CSV format. The fifth file, "deploymentAttributes", contains one record for each transmitter deployment in a CSV formatted table. The deployment attributes file contains information such as when the transmitter was attached to the animal, when tracking of a live animal ended, and a variety of variables describing the animal and transmitter. This table is identical to the "deploymentAttributes" table in the "processedData" folder of this data package.

DataID: 411 | doi:10.5066/P9ELFTSV | Date Posted Online: 2021-06-23 | Last Updated: 2021-06-25 10:54:49

This metadata document describes the data contained in the "processedData" folder of this data package. This data package contains all data collected by the Argos System from 17 satellite transmitters attached to Whooper Swans at a non-breeding site in Miyagi Prefecture, Japan, 2009. The raw data were processed to accomplish two goals: flag implausible location estimates and decode raw sensor data. Three Comma Separate Value (CSV) tables are included in the "processedData" folder of this data package: 1) the "diag_filteredLocations" table contains one record for every Argos location estimate collected, accompanied by a binary flag that denotes an algorithm's plausibility check (based on distance, turning angle, and rate thresholds). Each record also includes a 'Tracking_Status' variable that denotes whether the location was collected from a live animal, a dead animal, or shed transmitter, 2) the "decodedSensor" table contains decoded sensor data such as the transmitter's temperature, battery voltage, and motion (activity), and 3) the "deploymentAttributes" table contains one record for each transmitter deployment in a CSV formatted table. The deployment attributes file contains information such as when the transmitter was attached to the animal, when tracking of a live animal ended, and a variety of variables describing the animal and transmitter. This table is identical to the "deploymentAttributes" table in the "rawData" folder of this data package.

DataID: 412 | doi:10.5066/P9ELFTSV | Date Posted Online: 2021-06-23 | Last Updated: 2021-06-25 10:54:49

These data are in one table with measures of the external morphology and internal organ and muscle groups collected from Bar-tailed Godwits.

DataID: 404 | doi:10.5066/P9GIQ8J2 | Date Posted Online: 2021-06-22 | Last Updated:

This dataset contains rasters and polygon shapefiles related to predicted resource use of the Porcupine Caribou Herd (PCH) during the calving (26 May–10 June) and post-calving (11–30 June) seasons in Alaska and the Yukon Territory. Resource selection was analyzed for each season using random forest models, which compared female caribou GPS collar locations (2012–2018) to available locations within the study area. The models assessed the influence of annual variation in spring phenology (dates of snowmelt, onset of vegetation greenness, and the 50% maximum NDVI value) on caribou resource use, while also accounting for static landcover and topographic variables. For each year GPS collar data were collected (2012–2018), we provide rasters of predicted relative probabilities of use (ranging from 0 to 1) during the calving and post-calving seasons given year-specific phenological conditions. We also provide annual polygons depicting "suitable" habitat, which were delineated from the rasters based on probability of use thresholds that minimized the mean class error (i.e., the average of the used and available location error rates; calving threshold: 0.534, post-calving threshold: 0.522). In addition to annual rasters and polygons, we provide an average raster and polygon across the study period (2012–2018) for each season.

We then projected future PCH calving and post-calving resource use based on predicted climate-driven shifts in spring phenology. We first used random forest regression to model phenology dates as a function of temperature, precipitation, and topographic covariates. We then obtained decadal averages of climate projections from the Coupled Model Inter-Comparison Project 5 for Representative Concentration Pathway 8.5 for the 2030s, 2040s, and 2050s. We used the climate projections to predict future dates of spring snowmelt and vegetation phenology across the study area, which were then applied to our resource selection models to project future PCH calving and post-calving resource use. For each decade in the 2030s, 2040s and 2050s, we provide a raster of the average predicted probability of use and a polygon depicting average suitable habitat. Decadal averages were used to reduce annual variation in spatial predictions so trends in suitable habitat could be more easily compared across time periods. Probabilities of use could not be estimated for pixels with missing phenology data, and thus, those pixels are not assigned probability values.

We also provide a shapefile of the study area boundary, which defined habitat availability for resource selection models and the extent of our spatial predictions. The study area was delineated from a 95% contour of an annually-weighted kernel density estimate of caribou locations during the combined calving and post-calving seasons and buffered by the mean daily caribou movement rate in the location dataset (13 km).

DataID: 405 | doi:10.5066/P9TTRPAC | Date Posted Online: 2021-06-22 | Last Updated: 2022-05-10 13:23:55

These data are in six tables relating to surveys of eelgrass beds in three bays adjacent to Togiak National Wildlife Refuge, in southwestern Alaska. The tables provide environmental conditions, eelgrass abundance, distribution, and measurements used to estimate overall biomass.

DataID: 406 | doi:10.5066/P92BMFTH | Date Posted Online: 2021-06-22 | Last Updated: 2022-10-11 16:20:24

These data are in six tables relating to surveys of eelgrass beds in Chignik Lagoon and Mud Bay, Alaska Peninsula-Becharof National Wildlife Refuges. The tables provide environmental conditions, eelgrass abundance, distribution, and measurements used to estimate overall biomass.

DataID: 407 | doi:10.5066/P9URZJYW | Date Posted Online: 2021-06-22 | Last Updated: 2022-10-11 16:20:26

No data are available from this page.

Field survey data of eelgrass distribution and abundance at Chignik Lagoon are available in a USGS Data Release: https://doi.org/10.5066/P9URZJYW

Map data of eelgrass distribution from locations in Alaska (including Chignik Lagoon) are available in a USGS Data Release: https://doi.org/10.5066/P9WEK4JI

DataID: 524 | doi:10.5066/F7VQ31X8 | Date Posted Online: 2021-06-22 | Last Updated: 2022-10-18 11:20:38

This data release contains the elemental concentration data for more than 1700 archived stream-sediment samples collected in Alaska. Samples were retrieved from the USGS Mineral Program's sample archive in Denver, CO, and the Alaska Division of Geological and Geophysical Surveys Geologic Materials Center in Anchorage, AK. All samples were analyzed using a multi-element analytical method involving fusion of the sample by sodium peroxide, dissolution of the fusion cake by nitric acid, and elemental analysis by inductively coupled plasma-optical emission spectroscopy (ICP-OES) and inductively coupled plasma-mass spectroscopy (ICP-MS). Additionally, 106 samples from the Nixon Fork area were analyzed by a second multi-element method in which the samples are decomposed by a mixture of hydrochloric, nitric, perchloric, and hydrofluoric acids and the elemental composition is determined by ICP-OES and ICP-MS. New Hg (mercury) concentrations, determined by cold-vapor atomic absorption spectrometry, are reported for 296 samples from southeast Alaska.

DataID: 403 | doi:10.5066/P9FR1D6Y | Date Posted Online: 2021-06-02 | Last Updated: 2021-06-02 10:41:46

This data are a single table of nest records from a multi-year study of Pacific Common Eider (Somateria mollissima v-nigrum) biology that was conducted along the lower Kashunuk River, Kigigak Island, and the mouth of the Tutakoke River on the Yukon-Kuskokwim Delta from 1991-2004.

DataID: 402 | doi:10.5066/P9G6G0AV | Date Posted Online: 2021-05-27 | Last Updated: 2021-05-27 10:27:04

These data include stream water chemistry from headwater streams to large rivers across three national parks in Arctic Alaska: Bering Land Bridge National Preserve, Kobuk Valley National Park, and Noatak National Preserve.

DataID: 401 | doi:10.5066/P9SBK2DZ | Date Posted Online: 2021-05-25 | Last Updated: 2021-05-26 08:06:45

This dataset includes morphometric measurements and pregnancy / dependency status from sea otters captured or collected (experimental harvests or recovered after the Exxon Valdez Oil Spill) in Alaska, 1947-2019 by the U.S. Geological Survey (USGS) and the U.S. Fish and Wildlife Service (USFWS). Data collected include total body length, tail length, body mass, axillary girth, paw width, canine diameter and baculum length along with sex, age, and reproductive status of females (pregnancy / dependency status). For females with dependent pups, pup sex, mass, and total length are included when available. For harvested animals, data includes pregnancy status along with fetal sex, mass, and length.

DataID: 400 | doi:10.5066/P9Q5PD3Y | Date Posted Online: 2021-05-21 | Last Updated:

This data release is composed of seven datasets regarding colonial seabirds and forage fish at two seabird nesting colonies on Gull and Chisik Islands in lower Cook Inlet, Alaska. These data were collected to detect changes in the breeding population of Black-legged Kittiwakes and Common Murres on two nesting colonies in lower Cook Inlet and to compare those counts to baseline counts from 1995-1999. They are part of an ongoing study in lower Cook Inlet, Alaska to assess the recent status of forage fish and seabirds (2000-2020).

DataID: 393 | doi:10.5066/P961LWWE | Date Posted Online: 2021-05-20 | Last Updated: 2024-04-18 12:06:07

This dataset is comprised of two tables with age data along the Fairweather fault in Glacier Bay National Park. The tables are: (1) radiocarbon dates analyzed at the National Ocean Sciences Accelerator Mass Spectrometry Facility (NOSAMS), and (2) infrared stimulated luminescence ages determined by the Utah State University (USU) Luminescence Laboratory.

DataID: 392 | doi:10.5066/P9Q08JGV | Date Posted Online: 2021-05-17 | Last Updated: 2023-07-24 12:38:22

This metadata document describes the data contained in the "rawData" folder of this data package. This data package contains all data collected by the Argos System from 32 satellite transmitters attached to Whimbrels on their breeding range in arctic and western Alaska, 2006-2010. Five data files are included in the "rawData" folder of this data package. Two data files (with identical content) contain the raw Argos DIAG (Diagnostic) data, one in the legacy verbose ASCII format and one in a tabular Comma Separate Value (CSV) format. Two other data files (with identical content) contain the raw Argos DS (Dispose) data, one in the legacy verbose ASCII format and one in a tabular CSV format. The fifth file, "deploymentAttributes", contains one record for each transmitter deployment in a CSV formatted table. The deployment attributes file contains information such as when the transmitter was attached to the animal, when tracking of a live animal ended, and a variety of variables describing the animal and transmitter. This table is identical to the "deploymentAttributes" table in the "processedData" folder of this data package.

DataID: 391 | doi:10.5066/P978PX2X | Date Posted Online: 2021-05-11 | Last Updated: 2023-09-28 09:21:43

This dataset provides a detailed (1:10,000) digital map of fault and fold traces in Alaska, USA based on features identified in the freely available ArcticDEM 3.0. The fault traces represented in this dataset either revise the location and accuracy of known active faults or folds archived in the USGS Quaternary Fault and Fold Database, or represent the surface traces of active structures not previously recognized.

DataID: 389 | doi:10.5066/P9H02FXB | Date Posted Online: 2021-05-10 | Last Updated:

This data release is composed of three crustal (as opposed to subduction zone) geologic input datasets for the 2023 Alaska update to the U.S. National Seismic Hazard Model (NSHM): 1) fault section vector line data, 2) fault zone vector polygon data, and 3) accompanying earthquake geology attributes.

DataID: 390 | doi:10.5066/P97NRR0F | Date Posted Online: 2021-05-10 | Last Updated: 2023-02-15 08:42:04

Author(s): U.S. Geological Survey, Alaska Science Center.

DataID: 387 | doi:10.5066/P950QX28 | Date Posted Online: 2021-05-06 | Last Updated: 2022-02-16 13:37:45

This dataset provides information on the identity and number of insects that emerged from thaw pond basins on the central Arctic Coastal Plain, Alaska, during the summer growing season in 2012 and 2013. Collections were made using passive floating emergence traps in pond centers and margins from four types of ponds: low centered polygons, troughs, small coalescent, and large coalescent. A single table provides detail on the family level identity and number of insects captured, the day and year of capture, and the duration of trapping.

DataID: 385 | doi:10.5066/P9FG9DEO | Date Posted Online: 2021-04-30 | Last Updated: 2021-04-30 11:15:35

This metadata document describes VHF tracking data for Greater White-fronted Geese (Anser albifrons) that were marked annually from 1987 to 1991 in Alaska and the Klamath Basin (Oregon and California) and subsequently tracked through the Pacific Flyway (primarily in Alaska, California, and Mexico). Only tracking data for geese marked or located, at least once, in Alaska are included in this data package. Data for Greater White-fronted Geese tagged at Klamath Basin that were never relocated in Alaska are not included.

DataID: 386 | doi:10.5066/P9MBQ2GN | Date Posted Online: 2021-04-30 | Last Updated: 2021-04-30 12:49:47

These data are comprised of two tables, one table containing wolverine (Gulo gulo) sample and genetic information for 20 microsatellite loci (Gg10-1, Gg25, Gg37-2, Gg42-1, Gg192-1, Gg443, Gg452, Gg454, Gg465, Gg471, Gg473, Gg-3-1, Gg-4, Gg-7-1, Ggu_216-1, Lut604, Ma-3-1, Mvis075, Tt-1, and Tt-4) and genetic sex determination results from North America and one Russian wolverine. All samples were obtained from collections at the University of Alaska Museum of the North or the University of New Mexico's Museum of Southwestern Biology. The second table provides complete primer information for the genetic markers since several were redesigned from their originally-published sequences for this study.

DataID: 384 | doi:10.5066/P908DV91 | Date Posted Online: 2021-04-21 | Last Updated: 2021-04-30 11:15:50

This metadata document describes the data contained in the "processedData" folder of this data package. This data package contains all data collected by the Argos System from 53 satellite transmitters attached to Emperor geese on their breeding range in western Alaska, 1999-2003. The raw data were processed to accomplish two goals: flag implausible location estimates and decode raw sensor data. Three Comma Separate Value (CSV) tables are included in the "processedData" folder of this data package: 1) the "diag_filteredLocations" table contains one record for every Argos location estimate collected, accompanied by a binary flag that denotes an algorithm's plausibility check (based on distance, turning angle, and rate thresholds). Each record also includes a 'Tracking_Status' variable that denotes whether the location was collected from a live animal, a dead animal, or shed transmitter, 2) the "decodedSensor" table contains decoded sensor data such as the transmitter's temperature, battery voltage, and motion (activity), and 3) the "deploymentAttributes" table contains one record for each transmitter deployment in a CSV formatted table. The deployment attributes file contains information such as when the transmitter was attached to the animal, when tracking of a live animal ended, and a variety of variables describing the animal and transmitter. This table is identical to the "deploymentAttributes" table in the "rawData" folder of this data package.

DataID: 382 | doi:10.5066/P9GJQ6LF | Date Posted Online: 2021-04-16 | Last Updated: 2021-04-16 14:50:35

This metadata document describes the data contained in the "rawData" folder of this data package. This data package contains all data collected by the Argos System from 53 satellite transmitters attached to Emperor geese on their breeding range in western Alaska, 1999-2003. Five data files are included in the "rawData" folder of this data package. Two data files (with identical content) contain the raw Argos DIAG (Diagnostic) data, one in the legacy verbose ASCII format and one in a tabular Comma Separate Value (CSV) format. Two other data files (with identical content) contain the raw Argos DS (Dispose) data, one in the legacy verbose ASCII format and one in a tabular CSV format. The fifth file, "deploymentAttributes", contains one record for each transmitter deployment in a CSV formatted table. The deployment attributes file contains information such as when the transmitter was attached to the animal, when tracking of a live animal ended, and a variety of variables describing the animal and transmitter. This table is identical to the "deploymentAttributes" table in the "processedData" folder of this data package.

DataID: 383 | doi:10.5066/P9GJQ6LF | Date Posted Online: 2021-04-16 | Last Updated: 2021-04-16 14:50:37

This data set describes accession numbers for nucleotide sequence data derived from whole mitochondrial genome and double digest restriction-site associated DNA (ddRAD).

DataID: 381 | doi:10.5066/F7T43RK9 | Date Posted Online: 2021-04-08 | Last Updated:

These data are comprised of two tables, one of primers used for PCR amplifications and the other containing North American (n = 105), Mongolian (n = 1) and Russian (n = 5) ermine (Mustela spp.) sample accessions and NCBI GenBank DNA sequence accessions for mitogenomes and four nuclear genes (agouti signaling protein [ASIP], feline sarcoma [FES], growth hormone receptor [GHR], and serotonin receptor 1b [HTR1B]). All samples were obtained from collections at the University of Alaska Museum of the North or the University of New Mexico's Museum of Southwestern Biology.

DataID: 380 | doi:10.5066/P97INKCG | Date Posted Online: 2021-03-12 | Last Updated:

This dataset includes one table of blood parasite (hematozoa) infection data from 197 Emperor Geese (Anser canagicus) and 110 Cackling Geese (Branta hutchinsii minima) sampled on the Yukon-Kuskokwim Delta, Alaska, in 1998 and 2014. Three genera of blood parasites (Leucocytozoon, Haemoproteus, Plasmodium) were detected by molecular sequencing of a 479 bp fragment of the Cytochrome-b gene. The table provides age, sex, infection status, and NCBI GenBank accession numbers of the DNA sequences obtained from infected samples.

DataID: 378 | doi:10.5066/P9F7LD2I | Date Posted Online: 2021-03-10 | Last Updated: 2021-03-10 11:44:22

This data set provides NCBI accession numbers for nucleotide sequence data derived from a mitochondrial DNA locus (control region) and double digest restriction-site associated DNA (ddRAD).

DataID: 377 | doi:10.5066/F7T43R9Q | Date Posted Online: 2021-03-01 | Last Updated:

Glaciers are critical sources of water and solutes to downstream riverine and marine ecosystems. Samples were collected from surface streams, groundwater, rain, snow, and ice in the Wolverine Glacier basin and analyzed for a broad suite of geochemical constituents including common field parameters, major ions, stable isotopes of water, nutrients, metals, and dissolved organic carbon.

DataID: 375 | doi:10.5066/P9LLXNAX | Date Posted Online: 2021-02-23 | Last Updated:

Daily mean discharge is needed for water resource management of selected streams in the Fortymile River Basin. The U.S. Geological Survey, in cooperation with the U.S. Bureau of Land Management, developed a technique for estimating seasonal discharge at two short-record streamgage sites in the basin and evaluated the accuracy of the estimated records. Daily mean discharge values were estimated for May 15-September 30 for 1976-82 and 2006-18 for the U.S. Geological Survey streamgage sites 15330000, North Fork Fortymile River above Middle Fork near Franklin, Alaska and 15331000, Middle Fork Fortymile River near mouth near Chicken, Alaska. Relations between discharge for each study streamgage and an index streamgage, 15348000, Fortymile River near Steele Creek, Alaska, for concurrent seasonal periods in 2019 and 2020 were developed using the maintenance of variance extension type 3 (MOVE.3) record extension technique. The MOVE.3 regressions were used to estimate daily mean discharges at the study streamgage sites for the selected season for the longer period of record of the index streamgage. In addition, estimated records were generated from the regressions for the concurrent seasonal periods to evaluate the accuracy of the record extension techniques.

DataID: 376 | doi:10.5066/P9VCAOEZ | Date Posted Online: 2021-02-23 | Last Updated: 2021-02-23 10:37:11

This data release contains measurements of vegetation samples and temperature collected from experimental plots of Carex subspathacea along the Smith River Estuary, Alaska (2011-2013).

DataID: 374 | doi:10.5066/P9WMFBVN | Date Posted Online: 2021-02-19 | Last Updated: 2021-02-19 10:53:22

These data are in one table of territory occupancy data for loons and presence/absence data for fish species based on survey information for Pacific (Gavia pacifica) and Yellow-billed Loon (G. adamsii) and five species of fish (Alaska blackfish, arctic grayling, broad whitefish, least cisco, ninespine stickleback) from freshwater lakes on the Arctic Coastal Plain in northern Alaska, 2011-2014. We surveyed lakes in northern Alaska to understand how fish communities may impact the occupancy and breeding success of loons. Data were collected as part of the U.S. Geological Survey Changing Arctic Ecosystems Initiative to understand the response of wildlife to rapid physical changes taking place in the Arctic.

DataID: 366 | doi:10.5066/P9Z3AGXS | Date Posted Online: 2021-01-28 | Last Updated: 2021-02-11 09:37:21

This data set contains major and trace element geochemical data and 40Ar/39Ar isotopic data and ages for rock samples collected during 2016 fieldwork in Glacier Bay National Park and Preserve. The plutonic rock samples were collected for radiometric age determinations to test for the presence of the Late Jurassic to Early Cretaceous (130-160 Ma) Saint Elias suite. The age analyses indicate that all the dated plutons are too young to be included in the Saint Elias suite.

DataID: 364 | doi:10.5066/P987S177 | Date Posted Online: 2021-01-25 | Last Updated: 2021-02-11 09:37:15

This data set provides low-temperature thermochronometric data from 15 rock samples collected along the Fairweather fault in southeast Alaska. These data are from four different analyses used to estimate cooling ages: 1) apatite (U-Th)/He, 2) zircon (U-Th)/He, 3) apatite fission-track, and 4) zircon fission-track.

DataID: 365 | doi:10.5066/P9FUIJG8 | Date Posted Online: 2021-01-25 | Last Updated: 2021-02-11 09:37:18

These data are the fatty acid compositions (in %) of adipose tissue samples collected from polar bears and of blubber samples collected from ringed and bearded seal killed by polar bears in the Chukchi Sea, 2008-2017. The dataset includes sex, age, and age class of the bears that were sampled. The data are provided as % of each fatty acid identified via nomenclature that describes the structure of each fatty acid.

DataID: 361 | doi:10.5066/P92CRWOP | Date Posted Online: 2021-01-22 | Last Updated: 2021-02-11 09:37:08

This dataset includes carbon and nitrogen isotope concentrations measured in polar bear hair and marine mammal prey muscle and blubber samples collected 1978-2019 in the Beaufort and Chukchi Seas. Marine mammal prey samples were collected opportunistically either from polar bear seal kill sites or from marine mammals harvested by Native hunters, including ringed seal, bearded seal, gray whale, Pacific walrus, bowhead whale, beluga whale, spotted seal and ribbon seal. All prey samples were collected within the Alaska Beaufort or Chukchi Sea with the exception of gray whale samples that were collected in Chukotka. More specific information on the location in which prey samples were collected are provided within the data. Hair was collected from polar bears captured on the sea ice or land in the spring or fall from 1987-1989 and 2008-2017 in the Russia and/or Alaska portions of the Chukchi Sea and 1983-1989 and 2004-2016 in the Alaska Beaufort Sea. Whole hairs were analyzed for carbon and nitrogen isotopes. Prey samples were analyzed separately as blubber lipids, lipid-extracted blubber protein, bulk muscle, and lipid-extracted muscle. Not all tissues were available for all individual prey samples.

DataID: 362 | doi:10.5066/P9KM5FT2 | Date Posted Online: 2021-01-22 | Last Updated: 2021-02-11 09:37:10

This dataset contains lab-measured percent lipid and fatty acid composition data from Pacific walruses harvested in waters near Saint Lawrence Island. Each row indicates data from a single layer from a blubber core sample collected from one body site (flank, rump, or sternum) from one walrus harvested by Native Alaskans during the spring walrus hunts of 2007 - 2010. Blubber cores were divided into two roughly equal depths (inner and outer) and individually characterized. Results are proportion lipid content of the sub-sample mass and proportional abundance of each fatty acid of total fatty acids identified in the sub-sample on a wet-weight basis. Some samples were found to be inadequate due to lack of anatomical landmarks and do not have laboratory values indicated. Some samples are flagged as being incomplete based on notes from the laboratory.

DataID: 363 | doi:10.5066/P9P9GX3E | Date Posted Online: 2021-01-22 | Last Updated: 2021-02-11 09:37:13

This data set contains a single table of descriptions of benthic samples collected in 1998 at Nelson and Izembek lagoons, Alaska. This includes: the weight of the sample, the species or species group of benthic animals (also vegetation) and their number, size and weight, and the amount of sand and gravel. These data provide a basis for additional studies that includes sampling of the benthos in Nelson and/or Izembek lagoons. These data are important as historic information useful in examining long-term changes in the lagoons in light of changing climate.

DataID: 360 | doi:10.5066/P9J8NM4B | Date Posted Online: 2021-01-19 | Last Updated: 2021-01-19 05:31:19

These data are in two tables related to surveys conducted on wintering Emperor Geese in Alaska. Surveys counting the number of wintering Emperor Geese were conducted on Shemya Island in 2003 and 2016, and on Adak Island in 2016-2017. Data on abdominal profile indices (body condition) of Emperor Geese were collected on Shemya Island in 2016, on Adak Island in 2016-2017, and on Kodiak Island in 2015-2017.

DataID: 359 | doi:10.5066/P9KZH356 | Date Posted Online: 2021-01-13 | Last Updated: 2021-01-14 06:06:47

This data set describes nuclear microsatellite genotypes derived from eight autosomal loci (Aph02, Aph11, Aalµ1, Sfiµ4, Smo4, Smo7, Smo12, and Sfiµ8) and accession numbers for double digest restriction-site associated DNA (ddRAD) sequences.

DataID: 358 | doi:10.5066/P9D8CN8M | Date Posted Online: 2021-01-05 | Last Updated: 2023-07-07 12:36:24

SUPERSEDED DATA RELEASE
Provided here are the data used in preparation of the article Van Hemert et al. 2021 (https://doi.org/10.7589/JWD-D-20-00057).
These data have been combined with additional algal toxin sampling results in an updated U.S. Geological Survey data release.

**Users are strongly encouraged to access the most updated and complete set of algal toxin sampling results from the USGS Alaska Science Center: https://doi.org/10.5066/P9MLNP9H**

DataID: 356 | doi:10.5066/P9OK4I8M | Date Posted Online: 2020-12-18 | Last Updated: 2022-10-18 11:35:22

This data set includes information on collections of fecal samples from wild gulls (Larus spp.) at seven locations in Alaska, USA. Samples were screened for Escherichia coli (E. coli) and tested for resistance to multiple antibiotics.

DataID: 357 | doi:10.5066/P9U0XGI3 | Date Posted Online: 2020-12-18 | Last Updated: 2020-12-18 10:06:22

This data set contains selected information about U.S. Geological Survey (USGS) streamgages in Alaska that had at least 5 years of daily streamflow record through September 30, 2017. The goals for developing this dataset were to identify USGS streamgages that had at least 5 years of daily streamflow that responded mostly to seasonal meteorological inputs, that had a definable drainage basin above a minimum size from which basin characteristics could be determined, and that provided streamflow data not similar to another streamgage record in the dataset. Streamgages meeting these criteria for at least part of their records constituted the dataset for a study investigating seasonal flow regimes and streamflow drivers for Alaska. For 253 streamgages meeting selection criteria, data include period of record characteristics, basin characteristics, and flow regime cluster analysis results. The basin characteristics are provided in their original U.S. customary units and as values transformed to metric units. For an additional 78 streamgages, data include the special conditions affecting streamflow that disqualified the streamgage from the study, including recurring outburst floods, regulation, urbanization, hydrologic redundancy with another streamgage, drainage basin below minimum size, or an indeterminate drainage basin.

DataID: 355 | doi:10.5066/P90K2Y4R | Date Posted Online: 2020-12-17 | Last Updated: 2020-12-18 10:08:05

These data are in one table with age and sex composition counts of groups of walruses on ice floes in the northern Bering and Chukchi Seas. Counts were collected by visual observations from boats.

DataID: 354 | doi:10.5066/F79K4894 | Date Posted Online: 2020-12-14 | Last Updated: 2020-12-15 08:56:51

This data set contains allele sizes for 8 previously published and 16 novel microsatellite loci, and one microsatellite redesigned for amplification in Merlins (Falco columarius) associated with circadian clock control and polymorphism that has been associated with juvenile dispersal and migratory behavior in some avian species for Merlin (Falco columbarius) from North America (n=21). Allele sizes for the 16 microsatellite loci developed in this study are included for 12 Gyrfalcons (F. rusticolus) and 13 Peregrine Falcons (F. peregrinus). Additional population level data for Merlins and mtDNA will be added to this data release in the future.

DataID: 352 | doi:10.5066/P9BOU6CP | Date Posted Online: 2020-12-11 | Last Updated:

This data set describes nuclear microsatellite genotypes derived from six autosomal loci (AgCA222, Age7.1JT, BV13, BV20, NVH206, NVH195-2) in Cooper's Hawks. Samples originated from blood samples collected from live trapped birds.

DataID: 353 | doi:10.5066/P914SGB1 | Date Posted Online: 2020-12-11 | Last Updated: 2022-02-14 15:20:38

These data are in a single table that provides date and location information of Tundra Swans (Cygnus columbianus) that were sampled in Alaska for feathers that were subsequently used in a stable isotope analysis. Results of deuterium, nitrogen, and carbon stable isotope analysis of feathers are provided.

DataID: 350 | doi:10.5066/P9501CQV | Date Posted Online: 2020-11-13 | Last Updated: 2020-11-13 10:46:31

This dataset contains nesting information for birds breeding at a site on the Colville River, Alaska, 2011-2018. Nests were located during area searches conducted by biologists, and standardized information on each nest was collected following protocols of the Arctic Shorebird Demographic Network (Brown et al. 2014).

DataID: 349 | doi:10.5066/P9BJBRTO | Date Posted Online: 2020-11-12 | Last Updated: 2020-11-13 10:46:28

This metadata document describes the data contained in the "processedData" folder of this data package. This data package contains all data collected by the Argos System from 5 satellite transmitters attached to Tufted puffins on the Barren Islands in the northern Gulf of Alaska, 1995. The raw data were processed to accomplish two goals: flag implausible location estimates and decode raw sensor data. Three Comma Separate Value (CSV) tables are included in the "processedData" folder of this data package: 1) the "diag_filteredLocations" table contains one record for every Argos location estimate collected, accompanied by a binary flag that denotes an algorithm's plausibility check (based on distance, turning angle, and rate thresholds). Each record also includes a 'Tracking_Status' variable that denotes whether the location was collected from a live animal, a dead animal, or shed transmitter, 2) the "decodedSensor" table contains decoded sensor data such as the transmitter's temperature, battery voltage, and motion (activity), and 3) the "deploymentAttributes" table contains one record for each transmitter deployment in a CSV formatted table. The deployment attributes file contains information such as when the transmitter was attached to the animal, when tracking of a live animal ended, and a variety of variables describing the animal and transmitter. This table is identical to the "deploymentAttributes" table in the "rawData" folder of this data package.

DataID: 345 | doi:10.5066/P9L9EIUI | Date Posted Online: 2020-10-30 | Last Updated: 2020-10-30 13:02:41

This metadata document describes the data contained in the "rawData" folder of this data package. This data package contains all data collected by the Argos System from 5 satellite transmitters attached to Tufted puffins on the Barren Islands in the northern Gulf of Alaska, 1995. Five data files are included in the "rawData" folder of this data package. Two data files (with identical content) contain the raw Argos DIAG (Diagnostic) data, one in the legacy verbose ASCII format and one in a tabular Comma Separate Value (CSV) format. Two other data files (with identical content) contain the raw Argos DS (Dispose) data, one in the legacy verbose ASCII format and one in a tabular CSV format. The fifth file, "deploymentAttributes", contains one record for each transmitter deployment in a CSV formatted table. The deployment attributes file contains information such as when the transmitter was attached to the animal, when tracking of a live animal ended, and a variety of variables describing the animal and transmitter. This table is identical to the "deploymentAttributes" table in the "processedData" folder of this data package.

DataID: 346 | doi:10.5066/P9L9EIUI | Date Posted Online: 2020-10-30 | Last Updated: 2020-10-30 13:02:43

This metadata document describes the data contained in the "rawData" folder of this data package. This data package contains all data collected by the Argos System from 19 satellite transmitters attached to Northern Fulmars on their breeding range in the Bering Sea and northern Gulf of Alaska, 2001-2006. Five data files are included in the "rawData" folder of this data package. Two data files (with identical content) contain the raw Argos DIAG (Diagnostic) data, one in the legacy verbose ASCII format and one in a tabular Comma Separate Value (CSV) format. Two other data files (with identical content) contain the raw Argos DS (Dispose) data, one in the legacy verbose ASCII format and one in a tabular CSV format. The fifth file, "deploymentAttributes", contains one record for each transmitter deployment in a CSV formatted table. The deployment attributes file contains information such as when the transmitter was attached to the animal, when tracking of a live animal ended, and a variety of variables describing the animal and transmitter. This table is identical to the "deploymentAttributes" table in the "processedData" folder of this data package.

DataID: 347 | doi:10.5066/P992BR5E | Date Posted Online: 2020-10-30 | Last Updated: 2020-10-30 13:02:45

This metadata document describes the data contained in the "processedData" folder of this data package. This data package contains all data collected by the Argos System from 19 satellite transmitters attached to Northern Fulmars on their breeding range in the Bering Sea and northern Gulf of Alaska, 2001-2006. The raw data were processed to accomplish two goals: flag implausible location estimates and decode raw sensor data. Three Comma Separate Value (CSV) tables are included in the "processedData" folder of this data package: 1) the "diag_filteredLocations" table contains one record for every Argos location estimate collected, accompanied by a binary flag that denotes an algorithm's plausibility check (based on distance, turning angle, and rate thresholds). Each record also includes a 'Tracking_Status' variable that denotes whether the location was collected from a live animal, a dead animal, or shed transmitter, 2) the "decodedSensor" table contains decoded sensor data such as the transmitter's temperature, battery voltage, and motion (activity), and 3) the "deploymentAttributes" table contains one record for each transmitter deployment in a CSV formatted table. The deployment attributes file contains information such as when the transmitter was attached to the animal, when tracking of a live animal ended, and a variety of variables describing the animal and transmitter. This table is identical to the "deploymentAttributes" table in the "rawData" folder of this data package.

DataID: 348 | doi:10.5066/P992BR5E | Date Posted Online: 2020-10-30 | Last Updated: 2020-10-30 13:02:47

This data set contains tables containing uranium-lead (U-Pb) isotopic data and the crystallization age of zircon from a metamorphic rock from the Manzano Mountains, New Mexico, collected in 2005. The bulk sample was processed into concentrated mineral separates of zircon at the University of Texas at Austin and analyzed by U.S. Geological Survey (USGS) research scientists at the Stanford-USGS Sensitive High Resolution Ion Microprobe with Reverse-Geometry (SHRIMP-RG) at Stanford University. The data table (geology_SHRIMPRGData_NM_Jones.csv) accompanying this data release reports the isotopic composition of uranium (U) and thorium (Th) measured in each grain, ratios of two isotopes of lead (207Pb and 206Pb) and two isotopes of uranium (235U and 238U), the age of each grain, and concentrations of selected trace elements measured in each grain. A second table (geology_sampleSummary_NM_Jones.csv) reports the sample location, rock characteristics, and interpreted age. Additionally, a third data table (geology_dataDictionary_NM_Jones.csv) is provided as a reference guide for the user.

DataID: 344 | doi:10.5066/P9U0P2ZY | Date Posted Online: 2020-10-27 | Last Updated: 2020-12-01 11:10:49

These data are in one table and document the numbers of four species of shorebird counted during aerial surveys of coastal sites in western Alaska. Survey regions encompassed coastline between the mouths of the Kuskokwim and Yukon rivers, and the northern coast of the Alaska Peninsula from the mouths of the Kvichak and Naknek Rivers to Nelson Lagoon. Surveys were flown from 7-9 September 2018 and 20-22 August 2019.

DataID: 343 | doi:10.5066/P9ZS5Y6N | Date Posted Online: 2020-10-15 | Last Updated: 2022-01-19 15:06:35

This data set documents the temperature and dissolved oxygen of water during the implementation of a new experimental thermal challenge protocol for migrating adult Pacific salmon in remote settings. This experiment was conducted with migrating adult Chinook salmon near Pilot Station, Alaska, along the Yukon River in a location without access to utilities. The analysis of this data was published in Donnelly et al. 2020 (DOI:10.1093/conphys/coaa074).

DataID: 338 | doi:10.5066/P9ECW77M | Date Posted Online: 2020-10-09 | Last Updated: 2020-10-09 10:48:41

These raster images represent continuous surfaces of estimated land cover types and probabilities for the western Kenai Peninsula circa 1973, circa 2002, and circa 2017.

DataID: 342 | doi:10.5066/P92BGHW1 | Date Posted Online: 2020-10-09 | Last Updated: 2020-10-13 09:35:54

This dataset provides a digital elevation model mosaic derived from airborne lidar data acquired in 2018 from September 2-3 over eight separate areas along Alaska's Montague Island coast, between Prince William Sound and the Gulf of Alaska.

DataID: 336 | doi:10.5066/P9FLQROT | Date Posted Online: 2020-10-08 | Last Updated: 2020-10-08 14:25:01

This data set documents the gene transcription levels for a panel of 12 selected genes and the heat shock protein 70 (HSP70) protein abundance measured in the muscle tissue of individual wild Chinook salmon captured from locations within the U.S. portion of the Yukon River watershed. Chinook salmon were primarily captured in 2016 and 2017 from existing field efforts (n = 477). A small number of additional samples (n = 22) were collected in 2018 following an experimental temperature experiment conducted in Pilot Station, AK, USA. During this experiment individual fish were held for ~6 hours at either river ambient control water temperatures or a heated treatment temperature of 18 °C or 21 °C. This small experiment data set was used to validate and refine the use of gene transcription and HSP70 protein levels as heat stress biomarkers for Yukon River Chinook salmon. The analysis of this data was published in von Biela et al. 2020 (DOI:10.1139/cjfas-2020-0209).

DataID: 337 | doi:10.5066/P9Y0IZH2 | Date Posted Online: 2020-10-08 | Last Updated: 2020-10-09 08:34:41

Soil moisture and temperature were measured at four shallow depths in multiple locations within tundra and forested landscapes of the Agashashok River basin. The measurements were made continuously beginning in 2015 until the most recent download in summer, 2019 or until the sensors or loggers failed.

DataID: 334 | doi:10.5066/P9048PDL | Date Posted Online: 2020-09-25 | Last Updated: 2020-10-02 12:57:24

Meteorological data was collected from two locations in the Agashashok River Watershed, one high in the drainage located on tundra (67.5440 N, 161.6828 W) and a second on a rocky knoll near the watershed mouth (67.2821 N, 162.5841 W). The data contain information on air temperatures, rainfall, barometric pressure, relative humidity, incoming and outgoing radiation, and wind speed and direction. Data collection was discontinued due to equipment failure and substantial demolition of one station by a bear.

DataID: 335 | doi:10.5066/P9HRDPDY | Date Posted Online: 2020-09-25 | Last Updated: 2020-09-25 11:32:57

This data package contains four tables related to helminths and bacteria identified in the guts of North American shrews (Genus: Sorex). Tables include: two tables of specimen information about each shrew, such as species, museum collection identification, and NCBI accession IDs; one table of NBCI GenBank accession numbers of previously identified DNA sequences used in this study to design the helminth markers and serve as a reference library for the sequences obtained; and one table of taxonomic details of gut bacteria identified in this study.

DataID: 332 | doi:10.5066/P9YH4C20 | Date Posted Online: 2020-09-22 | Last Updated: 2020-11-10 15:43:20

This data set provides sample collection information and genetic data used to identify relationships between groups of North American accipiters, including one hybrid. Genetic data includes gender identification, nuclear and mtDNA sequence markers, and microsatellite genotypes derived from 20 autosomal loci (Age1302, Age1303, Age1304, Age1305, Age1306, Age1307, Age1308, Age1309, Age1310, Age1311, Age1312, Age1313, Age1314, Age1316, Age1317, Age1318, Age1319, Age1320, Age1321, and Age1322).

DataID: 333 | doi:10.5066/P9U28F8X | Date Posted Online: 2020-09-22 | Last Updated: 2020-11-10 15:43:23

These data describe an exercise in which known age and sex class of 100 Barrow's goldeneyes (Bucephala islandica), determined by expert examination bursa and plumage, was contrasted with age and sex classes estimated from photos by trained observers.

DataID: 331 | doi:10.5066/P92GRT3C | Date Posted Online: 2020-09-21 | Last Updated: 2020-09-21 12:07:11

This data set contains 40Ar/39Ar isotopic data and ages for rocks from the Yukon-Tanana upland of eastern Alaska and the northern Aleutian Range of south-central Alaska. The entire sample suite was collected as part of geological mapping and supporting geochemical and geochronological analysis were conducted from 2013 to 2019 by the Mineral Resources Program of the U.S. Geological Survey (USGS). Legacy bedrock samples archived from earlier USGS field investigations were also analyzed in some cases. Hornblende, muscovite, and (or) biotite were extracted from bedrock samples of igneous and metamorphic rocks and analyzed at the University of Alaska Fairbanks Geochronology Laboratory in order to determine the 40Ar/39Ar age of each mineral phase. The data tables accompanying this data release report the resulting 40Ar/39Ar analytical data and interpreted ages for each mineral separated from a bulk rock sample.

DataID: 330 | doi:10.5066/P96762V3 | Date Posted Online: 2020-09-18 | Last Updated: 2020-09-21 12:05:27

This data set is comprised of two tables, one with results of poecivirus screening of tissues from six North American avian species using PCR followed by Sanger sequencing in addition to unbiased metagenomic sequencing, the second lists the names and sequences of primers used.

DataID: 329 | doi:10.5066/P9YQCHSR | Date Posted Online: 2020-09-10 | Last Updated:

This data set contains 3 tables containing uranium-lead (U-Pb) isotopic data and crystallization ages of zircon and titanite from igneous, metamorphic, and sedimentary rocks collected from the Yukon-Tanana upland of eastern interior Alaska between 2013 and 2019. Bulk samples of igneous and metamorphic rocks were processed into concentrated mineral separates of zircon and (or) titanite in USGS laboratories in Denver, Colorado, or by Apatite to Zircon, Inc. (A2Z) and analyzed by USGS research scientists at the Stanford-USGS Sensitive High Resolution Ion Microprobe with Reverse-Geometry (SHRIMP-RG) at Stanford University. Bulk samples of sedimentary and metasedimentary rocks were processed into concentrated mineral separates of detrital zircon and analyzed by Apatite to Zircon, Inc. and GeoSep Services (GSS) using laser-ablation-inductively-coupled-plasma-mass spectrometry (LA-ICP-MS) techniques. The 2 data tables (geology_detritalZircon_easternAK_Jones.csv; geology_SHRIMPRGData_easternAK_Jones.csv) accompanying this data release report the isotopic composition of uranium (U) and thorium (Th) measured in each grain, ratios of two isotopes of lead (207Pb and 206Pb) and two isotopes of uranium (235U and 238U), and the age of each grain. A third table (geology_sampleSummary_easternAK_Jones.csv) reports sample locations, rock characteristics, and interpreted ages. The SHRIMP-RG data table (geology_SHRIMPRGData_easternAK_Jones.csv) also reports concentrations of selected trace elements measured in each grain.

DataID: 328 | doi:10.5066/P9WWV93S | Date Posted Online: 2020-08-26 | Last Updated: 2020-09-11 12:41:13

This metadata document describes the data contained in the "processedData" folder of this data package. This data package contains all data collected by the Argos System from 28 satellite transmitters attached to Common murres on their breeding range in arctic and western Alaska, 1994-1996. The raw data were processed to accomplish two goals: flag implausible location estimates and decode raw sensor data. Three Comma Separate Value (CSV) tables are included in the "processedData" folder of this data package: 1) the "diag_filteredLocations" table contains one record for every Argos location estimate collected, accompanied by a binary flag that denotes an algorithm's plausibility check (based on distance, turning angle, and rate thresholds). Each record also includes a 'Tracking_Status' variable that denotes whether the location was collected from a live animal, a dead animal, or shed transmitter, 2) the "decodedSensor" table contains decoded sensor data such as the transmitter's temperature, battery voltage, and motion (activity), and 3) the "deploymentAttributes" table contains one record for each transmitter deployment in a CSV formatted table. The deployment attributes file contains information such as when the transmitter was attached to the animal, when tracking of a live animal ended, and a variety of variables describing the animal and transmitter. This table is identical to the "deploymentAttributes" table in the "rawData" folder of this data package.

DataID: 320 | doi:10.5066/P9SOW6V2 | Date Posted Online: 2020-08-18 | Last Updated: 2020-08-19 12:30:28

This metadata document describes the data contained in the "rawData" folder of this data package. This data package contains all data collected by the Argos System from 28 satellite transmitters attached to Common murres on their breeding range in arctic and western Alaska, 1994-1996. Five data files are included in the "rawData" folder of this data package. Two data files (with identical content) contain the raw Argos DIAG (Diagnostic) data, one in the legacy verbose ASCII format and one in a tabular Comma Separate Value (CSV) format. Two other data files (with identical content) contain the raw Argos DS (Dispose) data, one in the legacy verbose ASCII format and one in a tabular CSV format. The fifth file, "deploymentAttributes", contains one record for each transmitter deployment in a CSV formatted table. The deployment attributes file contains information such as when the transmitter was attached to the animal, when tracking of a live animal ended, and a variety of variables describing the animal and transmitter. This table is identical to the "deploymentAttributes" table in the "processedData" folder of this data package.

DataID: 321 | doi:10.5066/P9SOW6V2 | Date Posted Online: 2020-08-18 | Last Updated: 2020-08-19 12:31:14

This metadata document describes the data contained in the "processedData" folder of this data package. This data package contains all data collected by the Argos System from 20 satellite transmitters attached to Thick-billed murres on their breeding range in arctic and western Alaska, 1995-1996. The raw data were processed to accomplish two goals: flag implausible location estimates and decode raw sensor data. Three Comma Separate Value (CSV) tables are included in the "processedData" folder of this data package: 1) the "diag_filteredLocations" table contains one record for every Argos location estimate collected, accompanied by a binary flag that denotes an algorithm's plausibility check (based on distance, turning angle, and rate thresholds). Each record also includes a 'Tracking_Status' variable that denotes whether the location was collected from a live animal, a dead animal, or shed transmitter, 2) the "decodedSensor" table contains decoded sensor data such as the transmitter's temperature, battery voltage, and motion (activity), and 3) the "deploymentAttributes" table contains one record for each transmitter deployment in a CSV formatted table. The deployment attributes file contains information such as when the transmitter was attached to the animal, when tracking of a live animal ended, and a variety of variables describing the animal and transmitter. This table is identical to the "deploymentAttributes" table in the "rawData" folder of this data package.

DataID: 322 | doi:10.5066/P983BSVQ | Date Posted Online: 2020-08-18 | Last Updated: 2020-08-19 15:07:46

This metadata document describes the data contained in the "rawData" folder of this data package. This data package contains all data collected by the Argos System from 20 satellite transmitters attached to Thick-billed murres on their breeding range in arctic and western Alaska, 1995-1996. Five data files are included in the "rawData" folder of this data package. Two data files (with identical content) contain the raw Argos DIAG (Diagnostic) data, one in the legacy verbose ASCII format and one in a tabular Comma Separate Value (CSV) format. Two other data files (with identical content) contain the raw Argos DS (Dispose) data, one in the legacy verbose ASCII format and one in a tabular CSV format. The fifth file, "deploymentAttributes", contains one record for each transmitter deployment in a CSV formatted table. The deployment attributes file contains information such as when the transmitter was attached to the animal, when tracking of a live animal ended, and a variety of variables describing the animal and transmitter. This table is identical to the "deploymentAttributes" table in the "processedData" folder of this data package.

DataID: 323 | doi:10.5066/P983BSVQ | Date Posted Online: 2020-08-18 | Last Updated: 2020-08-19 15:07:44

This metadata document describes the data contained in the "processedData" folder of this data package. This data package contains all data collected by the Argos System from 2 satellite transmitters attached to Red-faced cormorants on Attu Island Alaska, 2006. The raw data were processed to accomplish two goals: flag implausible location estimates and decode raw sensor data. Three Comma Separate Value (CSV) tables are included in the "processedData" folder of this data package: 1) the "diag_filteredLocations" table contains one record for every Argos location estimate collected, accompanied by a binary flag that denotes an algorithm's plausibility check (based on distance, turning angle, and rate thresholds). Each record also includes a 'Tracking_Status' variable that denotes whether the location was collected from a live animal, a dead animal, or shed transmitter, 2) the "decodedSensor" table contains decoded sensor data such as the transmitter's temperature, battery voltage, and motion (activity), and 3) the "deploymentAttributes" table contains one record for each transmitter deployment in a CSV formatted table. The deployment attributes file contains information such as when the transmitter was attached to the animal, when tracking of a live animal ended, and a variety of variables describing the animal and transmitter. This table is identical to the "deploymentAttributes" table in the "rawData" folder of this data package.

DataID: 324 | doi:10.5066/P902U2RO | Date Posted Online: 2020-08-18 | Last Updated: 2020-08-19 12:32:27

This metadata document describes the data contained in the "rawData" folder of this data package. This data package contains all data collected by the Argos System from 2 satellite transmitters attached to Red-faced cormorants on Attu Island Alaska, 2006. Five data files are included in the "rawData" folder of this data package. Two data files (with identical content) contain the raw Argos DIAG (Diagnostic) data, one in the legacy verbose ASCII format and one in a tabular Comma Separate Value (CSV) format. Two other data files (with identical content) contain the raw Argos DS (Dispose) data, one in the legacy verbose ASCII format and one in a tabular CSV format. The fifth file, "deploymentAttributes", contains one record for each transmitter deployment in a CSV formatted table. The deployment attributes file contains information such as when the transmitter was attached to the animal, when tracking of a live animal ended, and a variety of variables describing the animal and transmitter. This table is identical to the "deploymentAttributes" table in the "processedData" folder of this data package.

DataID: 325 | doi:10.5066/P902U2RO | Date Posted Online: 2020-08-18 | Last Updated: 2020-08-19 12:32:47

This metadata document describes the data contained in the "processedData" folder of this data package. This data package contains all data collected by the Argos System from 8 satellite transmitters attached to Pelagic cormorants on their breeding range at Middleton and Attu Islands, Alaska, 2000-2006. The raw data were processed to accomplish two goals: flag implausible location estimates and decode raw sensor data. Three Comma Separate Value (CSV) tables are included in the "processedData" folder of this data package: 1) the "diag_filteredLocations" table contains one record for every Argos location estimate collected, accompanied by a binary flag that denotes an algorithm's plausibility check (based on distance, turning angle, and rate thresholds). Each record also includes a 'Tracking_Status' variable that denotes whether the location was collected from a live animal, a dead animal, or shed transmitter, 2) the "decodedSensor" table contains decoded sensor data such as the transmitter's temperature, battery voltage, and motion (activity), and 3) the "deploymentAttributes" table contains one record for each transmitter deployment in a CSV formatted table. The deployment attributes file contains information such as when the transmitter was attached to the animal, when tracking of a live animal ended, and a variety of variables describing the animal and transmitter. This table is identical to the "deploymentAttributes" table in the "rawData" folder of this data package.

DataID: 326 | doi:10.5066/P9Y5PQY3 | Date Posted Online: 2020-08-18 | Last Updated: 2020-08-19 12:33:09

This metadata document describes the data contained in the "rawData" folder of this data package. This data package contains all data collected by the Argos System from 8 satellite transmitters attached to Pelagic cormorants on Middleton and Attu Islands, Alaska, 2000-2006. Five data files are included in the "rawData" folder of this data package. Two data files (with identical content) contain the raw Argos DIAG (Diagnostic) data, one in the legacy verbose ASCII format and one in a tabular Comma Separate Value (CSV) format. Two other data files (with identical content) contain the raw Argos DS (Dispose) data, one in the legacy verbose ASCII format and one in a tabular CSV format. The fifth file, "deploymentAttributes", contains one record for each transmitter deployment in a CSV formatted table. The deployment attributes file contains information such as when the transmitter was attached to the animal, when tracking of a live animal ended, and a variety of variables describing the animal and transmitter. This table is identical to the "deploymentAttributes" table in the "processedData" folder of this data package.

DataID: 327 | doi:10.5066/P9Y5PQY3 | Date Posted Online: 2020-08-18 | Last Updated: 2020-08-19 12:33:29

This dataset presents boundaries and attributes of mapped geomorphic features in the lower 7.5 kilometers of the Taiya River valley bottom in and near Klondike Gold Rush National Historical Park near Skagway, Alaska. Geomorphic surfaces and off-main-stem channels were delineated from 2003 lidar elevation data and updated using 2017 and 2018 aerial orthophotographs at eroding riverbanks, such that the dataset generally represents 2018 conditions. Interpretations of geomorphic surface age primarily used 2003 lidar data and aerial imagery from 1948 and 2003. Mapped geomorphic surfaces consist of the 2003 active main stem (Taiya River and West Creek wetted channel, bars, islands, and major sloughs), additional areas recruited to the main stem by 2018, main stem surfaces abandoned between the 1940s and 2003, main stem surfaces abandoned prior to the 1940s, alluvial fans, and emergent tidal flats. Off-main-stem channel attributes include physical and hydrologic conditions related to water sources and were determined from 2003, 2017, and 2018 aerial imagery and field observations.

DataID: 319 | doi:10.5066/P9XP1SE7 | Date Posted Online: 2020-08-11 | Last Updated: 2020-08-11 11:40:54

This dataset includes soil data collected from various landscapes adjacent to thaw ponds on the North Slope of Alaska between 2012 and 2018. The landscapes include ice-rich polygonal ground found on basin uplands, as well as bluffs and lake edges. At each site a visual description of soil type and texture was performed, and a permafrost probe was used to determine a 'depth to refusal'. Given that the soils are mostly fine-grained and there were no obvious rock strikes, we believe that 'depth to refusal' indicates the thaw depth. Field-saturated hydraulic conductivity was determined in most locations using a Guelph Permeameter.

DataID: 316 | doi:10.5066/P9US8C5X | Date Posted Online: 2020-08-07 | Last Updated:

This dataset includes measures collected on polar bears captured in the Chukchi and Beaufort Seas, 1981-2017 by the U.S. Geological Survey and U.S. Fish and Wildlife Service. Data collected include body length, body mass, axillary girth, skull width and tail lengths. Bears were also aged as described in the methods. For some bears, an adipose tissue sample was collected and percent lipid content was measured, percent body fat was measured via bioelectrical impedance analysis, and/or recent feeding behavior was assessed via gut palpitation or blood urea and creatinine levels, all of which are further described in the methods.

DataID: 315 | doi:10.5066/P9TVK3PX | Date Posted Online: 2020-07-31 | Last Updated: 2020-07-31 12:33:03

This metadata document describes the data contained in the "processedData" folder of this data package. This data package contains all data collected by the Argos System from 217 satellite transmitters attached to Spectacled Eiders on their breeding range in arctic and western Alaska and northeastern Russia, 1993-2011. The raw data were processed to accomplish two goals: flag implausible location estimates and decode raw sensor data. Three Comma Separate Value (CSV) tables are included in the "processedData" folder of this data package: 1) the "diag_filteredLocations" table contains one record for every location estimate collected, accompanied by a binary flag that denotes an algorithm's plausibility check. Each record also includes a 'Tracking_Status' variable that denotes whether the location was collected from a live animal, a dead animal, or shed transmitter, 2) the "decodedSensor" table contains decoded sensor data such as a transmitter's temperature, battery voltage, and motion (activity), and 3) the "deploymentAttributes" table contains one record for each transmitter deployment in a CSV formatted table. The deployment attributes file contains information such as when the transmitter was attached to the animal, when tracking of a live animal ended, and a variety of variables describing the animal and transmitter. This table is identical to the "deploymentAttributes" table in the "rawData" folder of this data package.

DataID: 313 | doi:10.5066/P9B091HG | Date Posted Online: 2020-07-29 | Last Updated:

This metadata document describes the data contained in the "rawData" folder of this data package. This data package contains all data collected by the Argos System from 217 satellite transmitters attached to Spectacled Eiders on their breeding range in arctic and western Alaska and northeastern Russia, 1993-2011. Five data files are included in the "rawData" folder of this data package. Two data files (with identical content) contain the raw Argos DIAG (Diagnostic) data, one in the legacy verbose ASCII format and one in a tabular Comma Separate Value (CSV) format. Two other data files (with identical content) contain the raw Argos DS (Dispose) data, one in the legacy verbose ASCII format and one in a tabular CSV format. The fifth file, "deploymentAttributes", contains one record for each transmitter deployment in a CSV formatted table. The deployment attributes file contains information such as when the transmitter was attached to the animal, when tracking of a live animal ended, and a variety of variables describing the animal and transmitter. This table is identical to the "deploymentAttributes" table in the "processedData" folder of this data package.

DataID: 314 | doi:10.5066/P9B091HG | Date Posted Online: 2020-07-29 | Last Updated:

This data set provides sample data and NCBI accession information for genomic sequencing of ptarmigan and grouse from Alaska.

DataID: 312 | doi:10.5066/P9DDB01R | Date Posted Online: 2020-07-28 | Last Updated: 2021-12-29 16:28:34

This data set describes nucleotide sequence data derived from 18S ribosomal DNA amplified in two fragments. A total of 87 feces from Pacific walrus and 57 marine invertebrates were examined for this study. Samples were collected from the Bering Sea and Chukchi Sea, Alaska. Samples used in the study originated from feces or muscle samples collected in the field from ice floes or benthic van Veen grab samples.

DataID: 311 | doi:10.5066/P9WWMPLT | Date Posted Online: 2020-07-27 | Last Updated: 2020-11-10 15:41:12

This data set contains U-Pb isotopic data and ages of zircon and titanite from igneous and metamorphic rocks collected from the western Alaska and northern Aleutian Range of south-central Alaska. The data sets also contain U-Pb isotopic data and ages of detrital zircon from sedimentary and metasedimentary rocks collected in the same region but also from the Taylor and Wood River Mountains of southwestern Alaska. The entire sample suite was collected as part of geological mapping and supporting geochemical and geochronological analysis conducted from 2004 to 2019 and funded by the Mineral Resources Program of the U.S. Geological Survey (USGS). Zircon and (or) titanite were obtained from igneous and metamorphic rocks to determine the crystallization age and (or) age of metamorphism for the bedrock samples. Bulk rock samples were processed into concentrated mineral separates in USGS laboratories in Denver, Colorado, or by Apatite to Zircon, Inc. (A2Z) and analyzed by USGS research scientists at the Stanford-USGS Sensitive High Resolution Ion Microprobe with Reverse-Geometry (SHRIMP-RG) at Stanford University. Detrital zircon grains were obtained from samples of sedimentary and metasedimentary rocks to determine depositional age and sediment sources. Detrital zircon grains were separated from bulk bedrock samples and analyzed at one of three different laboratories [University of British Columbia (UBC, 2004 to 2006), at A2Z (2006 to 2009), and GeoSep Services (GSS, 2015 to 2019)] using laser-ablation-inductively-coupled-plasma-mass spectrometry (LA-ICP-MS) techniques. The data tables accompanying this data release report the isotopic composition of uranium (U) and thorium (Th) measured in each grain, ratios of two isotopes of lead (207Pb and 206Pb) and two isotopes of uranium (235U and 238U), and the age of each grain. The SHRIMP-RG data table also reports concentrations of selected trace elements measured in each grain.

DataID: 310 | doi:10.5066/P9K5NFKN | Date Posted Online: 2020-07-20 | Last Updated: 2020-09-11 12:45:47

This dataset comprises four tables containing cosmogenic beryllium-10 and aluminum-26 concentrations and related data, as well as infrared stimulated luminescence data, from samples collected at 21 sites along the Fortymile River in eastern Alaska and Yukon, Canada between 2016 to 2018, and processed between 2016 and 2019. The file "geology_siteLocations_Fortymile_bender_2020.csv" contains site locations in the NAD83 reference frame, and depositional ages or erosion rates computed from raw data contained in the other files. All files are linked by the "site_id" field.

DataID: 308 | doi:10.5066/P9XVMTAK | Date Posted Online: 2020-07-17 | Last Updated:

This data set includes 15-minute interval data on stream temperature, stage, and discharge from low-order streams in the Yukon River Basin in interior Alaska, collected during the summer months. The depth of the water and temperature were determined using a combined pressure transducer and temperature sensor that was deployed through the summer months. Different sensors were used in each stream and year, so a file is included detailing the stage and temperature accuracy for each year and stream. Discharge was derived from the stage data by creating a rating curve relating stage to discharge measured during site visits.

DataID: 309 | doi:10.5066/P9NOHTRB | Date Posted Online: 2020-07-17 | Last Updated: 2020-07-17 15:33:35

This data set contains sampling information, allele sizes of 11 microsatellite loci, and Genbank accession numbers of ddRAD seq results for scoters (Melanitta sp.). Microsatellite data is provided for three North American species of scoter (black scoter, M. americana n = 61; white-winged scoter, M. deglandi, n = 208 ; surf scoter, M. perspicillata, n = 145) and their European congeners (common scoter, M. nigra, n = 19; velvet scoter, M. fusca, n = 20 ). Individuals with ddRAD results include 27 black scoters, 4 common scoters, 32 surf scoters, 28 white-winged scoters, and 4 velvet scoters.

DataID: 307 | doi:10.5066/P9W7H2JK | Date Posted Online: 2020-07-10 | Last Updated: 2020-11-10 15:43:17

This data set documents the width of annual otolith growth increments from Lake Trout collected in lakes within Lake Clark National Park and Preserve, Alaska. The analysis of this data was published in von Biela et al. 2020 (DOI: 10.1111/eff.12566)

DataID: 306 | doi:10.5066/P92YV00Z | Date Posted Online: 2020-07-02 | Last Updated: 2020-10-09 12:01:28

Data sets containing: (1) sample collection and influenza A virus (IAV) screening information for wild ducks, (2) water temperature data for six North American wetlands, (3) water quality measurement from those wetlands, (4) laboratory-based study of viral viability using Minnesota wetland water, (5) naive mallards challenged experimentally with IAVs identified from the field experiment, and (6) genetic sequence data for IAVs recovered from the challenge study.

DataID: 305 | doi:10.5066/P98N5GKC | Date Posted Online: 2020-07-01 | Last Updated:

This metadata document describes the data contained in the "processedData" folder of this data package. This data package contains all data collected by the Argos System from 6 satellite transmitters attached to Glaucous-winged gulls on Middleton Island and 42 Argos-linked GPS satellite transmitters attached to three species of large-bodied gulls (genus Larus) and hybrids thereof, captured at landfills in southcentral, western and northern Alaska. The transmitters carried GPS receivers, so GPS tracking data represent the backbone of this data release. However, because the GPS locations were communicated through the Argos System, a time series of Argos (Doppler) tracking data also exists and is included. Four Comma Separate Value (CSV) tables are included in the "processedData" folder of this data package: 1) the "GPS_filteredLocations" table contains one record for every GPS location obtained, accompanied by a binary flag that denotes an algorithm's plausibility check (based on a speed threshold of 35 m/s); 2) the "diag_filteredLocations" table contains one record for every Argos location estimate collected, accompanied by a binary flag that denotes an algorithm's plausibility check (based on distance, turning angle, and rate thresholds). Each record in both the GPS and Argos filtered-location tables also includes a 'Tracking_Status' variable that denotes whether the location was collected from a live animal, a dead animal, or shed transmitter, 3) the "decodedSensor" table contains decoded sensor data such as the transmitter's temperature, battery voltage, and motion (activity), and 4) the "deploymentAttributes" table contains one record for each transmitter deployment in a CSV formatted table. The deployment attributes file contains information such as when the transmitter was attached to the animal, when tracking of a live animal ended, and a variety of variables describing the animal and transmitter. This table is identical to the "deploymentAttributes" table in the "rawData" folder of this data package.

DataID: 303 | doi:10.5066/P9FZ4OJW | Date Posted Online: 2020-06-26 | Last Updated: 2021-03-05 14:19:17

This metadata document describes the data contained in the "rawData" folder of this data package. This data package contains all data collected by the Argos System from 6 satellite transmitters attached to Glaucous-winged gulls on Middleton Island and 42 Argos-linked GPS satellite transmitters attached to three species of large-bodied gulls (genus Larus) and hybrids thereof, captured at landfills in southcentral, western and northern Alaska. The transmitters carried GPS receivers, so GPS tracking data represent the backbone of this data release. However, because the GPS locations were communicated through the Argos System, a time series of Argos (Doppler) tracking data also exists and is included. Five data files are included in the "rawData" folder of this data package. Two data files (with identical content) contain the raw Argos DIAG (Diagnostic) data, one in the legacy verbose ASCII format and one in a tabular Comma Separate Value (CSV) format. Two other data files (with identical content) contain the raw Argos DS (Dispose) data, one in the legacy verbose ASCII format and one in a tabular CSV format. The fifth file, "deploymentAttributes", contains one record for each transmitter deployment in a CSV formatted table. The deployment attributes file contains information such as when the transmitter was attached to the animal, when tracking of a live animal ended, and a variety of variables describing the animal and transmitter. This table is identical to the "deploymentAttributes" table in the "processedData" folder of this data package.

DataID: 304 | doi:10.5066/P9FZ4OJW | Date Posted Online: 2020-06-26 | Last Updated: 2021-03-05 14:19:22

This data consists of a single table morphologic measurement data and sex as determined by behavior and genetic techniques from 362 Buff-breasted Sandpipers (Calidris subruficollis) from Brazil, Texas and Alaska (1994 - 2017).

DataID: 302 | doi:10.5066/P9LVV8V6 | Date Posted Online: 2020-06-25 | Last Updated: 2020-06-26 12:03:58

This data release contains two tables of information on polar bear distributions in the southern Beaufort Sea during spring, from 2001 to 2016. One table provides location (classified into 5 broad regions) of individual bears during the spring. The other table presents the aerial search effort by year and area.

DataID: 301 | doi:10.5066/P9A9E5UP | Date Posted Online: 2020-06-12 | Last Updated: 2023-05-08 12:10:42

This data set contains U-Pb isotopic data and associated ages of titanite from one sample and detrital zircon grains from 33 sedimentary and metasedimentary rocks collected from the western Alaska Range in south-central Alaska. The samples were collected as part of geological mapping and research conducted between 2010 and 2014 and funded by the Mineral Resources Program of the U.S. Geological Survey. Titanite was separated by Apatite to Zircon, Inc. (A2Z) and analyzed by USGS research staff at the Stanford-US Geological Survey (USGS) Sensitive High Resolution Ion Microprobe with Reverse-Geometry (SHRIMP-RG) at Stanford University. Detrital zircon grains from each of the 33 samples were separated and analyzed by Apatite to Zircon, Inc. (A2Z) and GeoSep Services (GSS) laboratories between 2011 and 2014, using laser-ablation-inductively-coupled-plasma-mass spectrometry (LA-ICP-MS) techniques described in the supplemental file. The data tables report the concentration of the radioactive elements uranium (U) and thorium (Th) measured in each grain, corrected ratios of two isotopes of lead (207Pb and 206Pb) to two isotopes of uranium (235U and 238U), and the geologic age of each grain calculated from the isotopic ratios. The titanite data table also reports concentrations of selected trace elements measured in each grain.

DataID: 300 | doi:10.5066/P9JV5LM9 | Date Posted Online: 2020-06-11 | Last Updated: 2020-09-11 12:44:26

This dataset includes locations, pressure readings, and baro-corrected water surface elevations from three submersible pressure transducers deployed in the channel and floodplain of Snow River during the 2019 glacial lake outburst flood.

DataID: 299 | doi:10.5066/P9VVQH9D | Date Posted Online: 2020-06-03 | Last Updated:

This data set includes 15-minute interval data on stream temperature from low-order streams and main-stem rivers in the Noatak and Kobuk River valleys in Northwestern Alaska, collected during the summer months. The water temperatures were determined using a HOBO Water Temp Pro v2 (Onset Computer Corporation, Bourne, MA, USA) with ±0.2 °C accuracy. Sensors were place in several locations within each stream as well as in the main river below the tributary junction in order to assess stream thermal state.

DataID: 298 | doi:10.5066/P91HI62H | Date Posted Online: 2020-05-29 | Last Updated:

This data set contains information (in two tables) on nesting habitat and nest survival for American (Pluvialis dominica) and Pacific (P. fulva) Golden-Plovers monitored at seven study sites across an elevational gradient (28-416 m) on the Seward Peninsula in northwestern Alaska during the summers of 2012 and 2013. We used principal components analysis to reduce habitat measurements into two components that represented major habitat features.

DataID: 297 | doi:10.5066/P93EGFPO | Date Posted Online: 2020-05-20 | Last Updated: 2020-05-28 09:08:54

The data package "Sea Otter Aerial Survey Data from Southeast Alaska, 2002-2003" provides raw data for examining abundance and distribution of northern sea otters (Enhydra lutris kenyoni) in Southeast Alaska, based on data collected during a series of population-wide aerial surveys. The USGS aerial sea otter surveys have been completed multiple times using consistent methodology involving aerial-based counts. The surveys provide data and a population estimate that federal and state management agencies use for decision making and planning additional research. This data package includes a series of files with the raw digital data that was used for population estimates and population modeling found in related manuscripts.

DataID: 296 | doi:10.5066/P9PYG92B | Date Posted Online: 2020-05-13 | Last Updated:

The dataset consists of a polygon shapefile. Each polygon represents a set of molt units (interconnected lakes used as habitat by molting waterfowl) within the Goose Molting Area of the Teshekpuk Lake Special Area in northern Alaska, in addition to a half-mile or 1-mile wide buffer, that were selected for restrictions on new surface occupancy or infrastructure development by the oil and gas industry. Polygons represent the minimum area necessary to achieve a specific level of population coverage for Pacific Black Brant or Canada Geese that use the Teshekpuk Lake Special Area as molting habitat. All polygons include a 1-mile wide inland buffer along the Beaufort Sea coastline and a 3-mile wide buffer along the shore of Teshekpuk Lake, two areas already identified for surface occupancy/development restrictions by the Bureau of Land Management. Polygons were generated using two buffer widths to reflect uncertainty about the minimum horizontal distance needed to mitigate disturbance effects of industrial activity on molting geese. The boundaries of the Goose Molting Area are defined in the 2013 Record of Decision for the NPR-A Integrated Activity Plan (Bureau of Land Management).

DataID: 295 | doi:10.5066/P9ZGNRTB | Date Posted Online: 2020-05-05 | Last Updated: 2020-05-05 12:26:15

This data set is comprised of one table with sampling information and NCBI BioProject accession numbers for sequence information of this amplicon-based study targeting Labyrinthula, Phytophthora, and Halophytophthora of known pathogenic and non-pathogenic [to eelgrass (Zostera marina)] strains from eDNA samples. eDNA samples included water, sediment, and eelgrass from Notsuke Wan (Cove) Japan, Safety Sound, Izembek Lagoon, Port Moller, Chignik Lagoon, and Frederick Sound, Alaska and cloacal swabs from waterfowl hunted near Cold Bay Alaska. Replicate samples and multiple sampling dates of the same location were included. Highly conserved primers which could differentiate species of interest were developed for four portions of mtDNA genes (5.8S, 18S, ITS, and COI). The reference list and conserved primer sets to identify species present were developed using publicly available data https://www.ncbi.nlm.nih.gov/genbank/

DataID: 293 | doi:10.5066/P9T69I3V | Date Posted Online: 2020-04-27 | Last Updated: 2021-04-27 15:56:08

This data set is comprised of one table with Steller's Eider sample information and allele sizes for 6 microsatellite loci.

DataID: 294 | doi:10.5066/P967DZ5L | Date Posted Online: 2020-04-27 | Last Updated: 2020-11-10 15:43:12

This dataset includes physical, hydraulic, and thermal properties of soils collected in two sub-watersheds in the Noatak River Basin in northwestern Alaska. Physical properties include dry bulk density and porosity. Hydraulic properties include field- and lab-based hydraulic conductivity, soil-water retention data, and parameters used in a common soil-water retention model (van Genuchten model). Thermal properties include thermal conductivity, resistivity, diffusivity, and specific heat capacity.

DataID: 292 | doi:10.5066/P9C3JYUH | Date Posted Online: 2020-04-17 | Last Updated: 2020-04-27 09:43:57

These data are part of the Gulf Watch Alaska (GWA) long term monitoring program, nearshore monitoring component. The dataset is a comma separated file exported from a Microsoft Excel spreadsheet. The data consist of information related to collection of sea otter carcasses. Collectors walked selected shorelines searching for signs of carcasses. Date, location, carcass condition, parts collected, and notes are all recorded. Specimens collected include: complete carcasses, whole skulls, bacula, mandible, teeth, whiskers, tissue. Selected shorelines are in Alaska and include locations in Katmai National Park and Preserve, Kenai Fjords National Park, and Prince William Sound. The time interval includes 2006-2017.

DataID: 291 | doi:10.5066/F7H993CZ | Date Posted Online: 2020-03-27 | Last Updated: 2020-03-27 16:46:42

This metadata document describes the data contained in the "processedData" folder of this data package. This data package contains all data collected by the Argos System from 53 satellite transmitters attached to Black Scoters on their breeding and winter ranges in western Alaska, 2003-2007. The raw data were processed to accomplish two goals: flag implausible location estimates and decode raw sensor data. Three Comma Separate Value (CSV) tables are included in the "processedData" folder of this data package: 1) the "diag_filteredLocations" table contains one record for every location estimate collected, accompanied by a binary flag that denotes an algorithm's plausibility check. Each record also includes a 'Tracking_Status' variable that denotes whether the location was collected from a live animal, a dead animal, or shed transmitter, 2) the "decodedSensor" table contains decoded sensor data such as a transmitter's temperature, battery voltage, and motion (activity), and 3) the "deploymentAttributes" table contains one record for each transmitter deployment in a CSV formatted table. The deployment attributes file contains information such as when the transmitter was attached to the animal, when tracking of a live animal ended, and a variety of variables describing the animal and transmitter. This table is identical to the "deploymentAttributes" table in the "rawData" folder of this data package.

DataID: 289 | doi:10.5066/P93EF3TH | Date Posted Online: 2020-03-23 | Last Updated: 2020-03-23 20:48:46

This metadata document describes the data contained in the "rawData" folder of this data package. This data package contains all data collected by the Argos System from 53 satellite transmitters attached to Black Scoters on their breeding and winter ranges in western Alaska, 2003-2007. Five data files are included in the "rawData" folder of this data package. Two data files (with identical content) contain the raw Argos DIAG (Diagnostic) data, one in the legacy verbose ASCII format and one in a tabular Comma Separate Value (CSV) format. Two other data files (with identical content) contain the raw Argos DS (Dispose) data, one in the legacy verbose ASCII format and one in a tabular CSV format. The fifth file, "deploymentAttributes", contains one record for each transmitter deployment in a CSV formatted table. The deployment attributes file contains information such as when the transmitter was attached to the animal, when tracking of a live animal ended, and a variety of variables describing the animal and transmitter. This table is identical to the "deploymentAttributes" table in the "processedData" folder of this data package.

DataID: 290 | doi:10.5066/P93EF3TH | Date Posted Online: 2020-03-23 | Last Updated: 2020-03-23 20:48:48

This metadata document describes the data contained in the "processedData" folder of this data package. This data package contains all data collected by the Argos System from 25 satellite transmitters attached to Surf Scoters on their winter ranges in southeast Alaska and Baja California, Mexico, 2005-2008. The raw data were processed to accomplish two goals: flag implausible location estimates and decode raw sensor data. Three Comma Separate Value (CSV) tables are included in the "processedData" folder of this data package: 1) the "diag_filteredLocations" table contains one record for every location estimate collected, accompanied by a binary flag that denotes an algorithm's plausibility check. Each record also includes a 'Tracking_Status' variable that denotes whether the location was collected from a live animal, a dead animal, or shed transmitter, 2) the "decodedSensor" table contains decoded sensor data such as a transmitter's temperature, battery voltage, and motion (activity), and 3) the "deploymentAttributes" table contains one record for each transmitter deployment in a CSV formatted table. The deployment attributes file contains information such as when the transmitter was attached to the animal, when tracking of a live animal ended, and a variety of variables describing the animal and transmitter. This table is identical to the "deploymentAttributes" table in the "rawData" folder of this data package.

DataID: 287 | doi:10.5066/P9LUFGEF | Date Posted Online: 2020-03-17 | Last Updated: 2020-03-18 16:40:46

This metadata document describes the data contained in the "rawData" folder of this data package. This data package contains all data collected by the Argos System from 25 satellite transmitters attached to Surf Scoters on their winter ranges in southeast Alaska and Baja California, Mexico, 2005-2008. Five data files are included in the "rawData" folder of this data package. Two data files (with identical content) contain the raw Argos DIAG (Diagnostic) data, one in the legacy verbose ASCII format and one in a tabular Comma Separate Value (CSV) format. Two other data files (with identical content) contain the raw Argos DS (Dispose) data, one in the legacy verbose ASCII format and one in a tabular CSV format. The fifth file, "deploymentAttributes", contains one record for each transmitter deployment in a CSV formatted table. The deployment attributes file contains information such as when the transmitter was attached to the animal, when tracking of a live animal ended, and a variety of variables describing the animal and transmitter. This table is identical to the "deploymentAttributes" table in the "processedData" folder of this data package.

DataID: 288 | doi:10.5066/P9LUFGEF | Date Posted Online: 2020-03-17 | Last Updated: 2020-03-23 20:48:45

Mountain glaciers are closely coupled to climate processes, ecosystems, and regional water resources. To enhance physical understanding of these connections, the USGS maintains a collection of glacier mass balance and climate data across the western United States and Alaska. In some cases, records of glacier mass balance extend back to the mid-1940s. These data have been incorporated from various sources, primarily original USGS studies, but also including work from the University of Alaska, and the Juneau Icefield Research Program (JIRP). The core of this collection is composed of mass balance data from the USGS Benchmark Glaciers. These five glaciers are Lemon Creek Glacier, AK (1953 - Present), South Cascade Glacier, WA (1958 - Present), Gulkana and Wolverine glaciers, AK (1966 - Present), and Sperry Glacier, MT (2005 - Present). Datasets from each benchmark glacier are composed of, at a minimum, point mass balances, glacier hypsometry, daily temperature and precipitation, geodetic mass balances, and glacier-wide mass balances. Data from other glaciers within this collection may be less complete, continuous, or representative as data from the benchmark glaciers. In these cases, we urge users to carefully inspect the associated metadata of each specific data release for further details.

DataID: 286 | doi:10.5066/P9AGXQSR | Date Posted Online: 2020-03-16 | Last Updated:

These data are three sets of aerial photos used to estimate the number of walruses at a haulout near Pt. Lay, Alaska in September 2014. They were collected during photographic aerial surveys of the only major haulout that occurred on the eastern shores of the Chukchi Sea after sea ice receded beyond the continental shelf on 25 and 27 September 2014.

DataID: 285 | doi:10.5066/F7B27SB2 | Date Posted Online: 2020-03-09 | Last Updated:

These data are in two tables relating to fall age ratios (number of juvenile birds : total birds aged) of Black brant (Branta bernicla nigricans) staging in Izembek Lagoon, Alaska since 1963. The first file is observation data for the birds' age classes during surveys, and associated survey characteristics. The second file contains model-based estimates of age ratios by year along with SE, and 95% Bayesian credible intervals around estimates.

DataID: 284 | doi:10.5066/P9QIJIU2 | Date Posted Online: 2020-03-02 | Last Updated: 2023-12-22 08:40:45

This data set provides Polar Bear microsatellite genotypes derived from twenty loci (G1A, G10B, G10C, CXX110, G1D, G10H, G10J, G10L, G10M, MSUT2, MU59, G10P, 145P07, CPH9, CXX20, MU50, MU51, G10X, CXX173, G10U). Samples for microsatellite genetic analysis were collected from polar bears from the southern Beaufort Sea during the spring and fall, 2010-2013. Tissue samples were collected from captured bears, biopsy darts, and barbed-wire hair-snags. Genetic identification of individuals was used to determine and compare the relatedness of bears that used land during summer and fall to those bears that remained on the sea ice.

DataID: 282 | doi:10.5066/F78G8HX8 | Date Posted Online: 2020-02-24 | Last Updated:

This metadata document describes the data contained in the "processedData" folder of this data package. This data package contains data collected by the Argos System from 12 satellite transmitters attached to Pacific Loons on their breeding range in arctic, 2015-2016. The raw data were processed to accomplish two goals: flag implausible location estimates and decode raw sensor data. Two Comma Separate Value (CSV) tables are included in the "processedData" folder of this data package: 1) the "diag_filteredLocations" table contains one record for every location estimate, accompanied by a binary flag that denotes an algorithm's plausibility check. Each record also includes a 'Tracking_Status' variable that denotes whether the location was collected from a live animal, a dead animal, or shed transmitter, and 2) the "deploymentAttributes" table contains one record for each transmitter deployment in a CSV formatted table. The deployment attributes file contains information such as when the transmitter was attached to the animal, when tracking of a live animal ended, and a variety of variables describing the animal and transmitter.

DataID: 281 | doi:10.5066/P9NNN2XY | Date Posted Online: 2020-02-20 | Last Updated: 2020-03-02 14:53:33

These data consist of larval (< 60 mm) and age-1+ (> 60 mm) Capelin CPUE (Catch per unit effort) from various catch efforts throughout the Gulf of Alaska (GOA) from 1996 - 2017. The dataset contains the following information: fishing gear type, date, time, catch location (latitude and longitude), tow distance, number of capelin caught, and CPUE for capelin greater than and less than 60 millimeters. Gear types include beach seines and trawls.

DataID: 279 | doi:10.5066/P96XJDK3 | Date Posted Online: 2020-02-13 | Last Updated:

This data release contains 3 data sets, U-Pb isotopic data and associated ages of detrital zircon grains for 27 sedimentary rocks, whole rock major and trace-element geochemistry for 15 igneous or phosphatic rock samples, and whole rock Sr, Nd, and Pb isotopic data for 6 igneous rock samples. The samples were collected from multiple localities across Alaska as part of geological mapping and research conducted between 1974 and 2014 and funded by the Mineral Resources Program of the U.S. Geological Survey.

DataID: 278 | doi:10.5066/F7765DN7 | Date Posted Online: 2020-01-27 | Last Updated: 2020-09-11 12:42:07

This dataset includes accelerometer data collected on collars deployed on female polar bears in the southern Beaufort Sea from 2009-2016. The accelerometer was built in to collars by Telonics, Inc. and provides a single activity value of the number of seconds active per time interval of data collection. Data were collected every 15-30 minutes. GPS and ARGOs locations collected via collars were used to generate a CRAWL model, as referenced within the data set, of estimated locations that match the time frame of activity sensor data collection and are provided with this dataset. CRAWL data were also used to determine the habitat (land or sea ice) occupied by the bear at the end of the interval of activity data collection. Temperature data were used to identify denning behavior and activity during denning has been removed from this data set.

DataID: 277 | doi:10.5066/F7NZ85T1 | Date Posted Online: 2020-01-23 | Last Updated: 2020-01-27 14:49:56

This metadata document describes the data contained in the "processedData" folder of this data package. This data package contains all data collected by the Argos System from 50 satellite transmitters attached to Tundra Swans on their breeding range in arctic and western Alaska, 2008. The raw data were processed to accomplish two goals: flag implausible location estimates and decode raw sensor data. Three Comma Separate Value (CSV) tables are included in the "processedData" folder of this data package: 1) the "diag_filteredLocations" table contains one record for every location estimate collected, accompanied by a binary flag that denotes an algorithm's plausibility check. Each record also includes a 'Tracking_Status' variable that denotes whether the location was collected from a live animal, a dead animal, or shed transmitter, 2) the "decodedSensor" table contains decoded sensor data such as a transmitter's temperature, battery voltage, and motion (activity), and 3) the "deploymentAttributes" table contains one record for each transmitter deployment in a CSV formatted table. The deployment attributes file contains information such as when the transmitter was attached to the animal, when tracking of a live animal ended, and a variety of variables describing the animal and transmitter. This table is identical to the "deploymentAttributes" table in the "rawData" folder of this data package.

DataID: 275 | doi:10.5066/P9KBR79C | Date Posted Online: 2020-01-22 | Last Updated: 2020-01-27 14:50:35

This metadata document describes the data contained in the "rawData" folder of this data package. This data package contains all data collected by the Argos System from 50 satellite transmitters attached to Tundra Swans on their breeding range in arctic and western Alaska, 2008. Five data files are included in the "rawData" folder of this data package. Two data files (with identical content) contain the raw Argos DIAG (Diagnostic) data, one in the legacy verbose ASCII format and one in a tabular Comma Separate Value (CSV) format. Two other data files (with identical content) contain the raw Argos DS (Dispose) data, one in the legacy verbose ASCII format and one in a tabular CSV format. The fifth file, "deploymentAttributes", contains one record for each transmitter deployment in a CSV formatted table. The deployment attributes file contains information such as when the transmitter was attached to the animal, when tracking of a live animal ended, and a variety of variables describing the animal and transmitter. This table is identical to the "deploymentAttributes" table in the "processedData" folder of this data package.

DataID: 276 | doi:10.5066/P9KBR79C | Date Posted Online: 2020-01-22 | Last Updated: 2020-01-27 14:50:38

This dataset is three tables with details of samples and aliquots of waterfowl feces deposited in filtered surface water collected from an urban waterbody in Anchorage, Alaska in 2018-2019. Sample vials were submerged underwater in the same waterbody from which the samples were collected and the samples were tested for the presence and viability of influenza A virus. Temperature data and water chemistry measurements were also collected over time.

DataID: 274 | doi:10.5066/P9B8XH6E | Date Posted Online: 2020-01-14 | Last Updated: 2022-10-18 12:01:58

These data are in two tables relating to a die-off of Common Murres in the north Pacific, 2015-2016. The tables provide: 1) beach survey locations, date, time, distance surveyed (kilometers), and number of Common Murre carcasses observed during surveys conducted along the coastline of Alaska to document the 2015-2016 die-off of Common Murres coincident with the North Pacific marine heatwave, and 2) Common Murre necropsy results from carcasses collected during the die-off, including: bird identification number, collection date, collection location, and body and tissues measurements.

DataID: 272 | doi:10.5066/P9E8RE9I | Date Posted Online: 2020-01-10 | Last Updated: 2020-01-10 15:57:55

SUPERSEDED DATA RELEASE
Provided here are the data used in preparation of the article Van Hemert et al. 2020 (https://doi.org/10.1016/j.hal.2019.101730).
These data have been combined with additional algal toxin sampling results in an updated U.S. Geological Survey data release.

**Users are strongly encouraged to access the most updated and complete set of algal toxin sampling results from the USGS Alaska Science Center: https://doi.org/10.5066/P9MLNP9H**

DataID: 273 | doi:10.5066/P9UNY0FR | Date Posted Online: 2020-01-10 | Last Updated: 2024-05-15 15:37:26

This data release includes tabular surveyed and interpolated elevation data, the processed computational mesh, and model output data used in scour evaluations. The methods of deriving these datasets and using them to calculate scour are described in the associated Scientific Investigations Report "Scour evaluations and conditions at selected bridge sites in Alaska, 2016-2017". This is a cooperative project with Alaska Department of Transportation and Public Facilities.

DataID: 270 | doi:10.5066/P9LUTFHZ | Date Posted Online: 2019-12-20 | Last Updated: 2019-12-27 09:28:31

This data set is comprised of one table with sampling information and allele sizes for 69 individual Northern Fulmars (Fulmarus glacialis) from Chagulak Island, Alaska and Hafnarey Island, Iceland. Fulmar allele sizes are provided for 10 previously published and 26 novel microsatellite loci. Additionally, allele sizes for the 26 microsatellite loci developed in this study are included for Arctic Terns (Sterna paradisaea, n=4), Common Murres (Uria aalge, n=6), Crested Auklets (Aethia cristatella, n=6), Fork-tailed Storm Petrels (Oceanodroma furcata, n=5), Marbled Murrelets (Brachyramphus marmoratus, n=5), Common Gulls (Larus canus, n=5), Pelagic cormorants (Phalacrocorax pelagicus, n=5), and Thick-billed Murres (Uria lomvia, n=5) from various locations throughout Alaska.

DataID: 271 | doi:10.5066/P9KWA9VZ | Date Posted Online: 2019-12-20 | Last Updated: 2020-11-10 15:43:01

Tracking Data Maps

DataID: 266 | doi:10.5066/P9VA5I0M | Date Posted Online: 2019-12-12 | Last Updated: 2019-12-12 14:17:09

This metadata document describes the data contained in the "rawData" folder of this data package. This data package contains all data collected by the Argos System from 92 satellite transmitters attached to adult Yellow-billed Loons on their breeding range in Arctic Alaska and Canada, 2002-2017. Five data files are included in the "rawData" folder of this data package. Two data files (with identical content) contain the raw Argos DIAG (Diagnostic) data, one in the legacy verbose ASCII format and one in a tabular Comma Separate Value (CSV) format. Two other data files (with identical content) contain the raw Argos DS (Dispose) data, one in the legacy verbose ASCII format and one in a tabular CSV format. The fifth file, "deploymentAttributes", contains one record for each transmitter deployment in a CSV formatted table. The deployment attributes file contains information such as when the transmitter was attached to the animal, when tracking of a live animal ended, and a variety of variables describing the animal and transmitter. This table is identical to the "deploymentAttributes" table in the "processedData" folder of this data package.

DataID: 264 | doi:10.5066/P9UKHJ22 | Date Posted Online: 2019-12-03 | Last Updated:

This metadata document describes the data contained in the "processedData" folder of this data package. This data package contains all data collected by the Argos System from 92 satellite transmitters attached to adult Yellow-billed Loons on their breeding range in Arctic Alaska and Canada, 2002-2017. The raw data were processed to accomplish two goals: flag implausible location estimates and decode raw sensor data. Three Comma Separate Value (CSV) tables are included in the "processedData" folder of this data package: 1) the "diag_filteredLocations" table contains one record for every location estimate collected, accompanied by a binary flag that denotes an algorithm's plausibility check. Each record also includes a 'Tracking_Status' variable that denotes whether the location was collected from a live animal, a dead animal, or shed transmitter, 2) the "decodedSensor" table contains decoded sensor data such as a transmitter's temperature, battery voltage, and motion (activity), and 3) the "deploymentAttributes" table contains one record for each transmitter deployment in a CSV formatted table. The deployment attributes file contains information such as when the transmitter was attached to the animal, when tracking of a live animal ended, and a variety of variables describing the animal and transmitter. This table is identical to the "deploymentAttributes" table in the "rawData" folder of this data package.

DataID: 265 | doi:10.5066/P9UKHJ22 | Date Posted Online: 2019-12-03 | Last Updated: 2019-12-03 13:29:04

SUPERSEDED data release

No data are available from this page. Data previously available from the "Glacier-Wide Mass Balance and Compiled Data Inputs: Juneau Icefield Glaciers" data release are combined with other glacier-wide mass balance data from the U.S. Geological Survey, Benchmark Glacier Program in an updated data release.

DataID: 262 | doi:10.5066/P9YBZ36F | Date Posted Online: 2019-11-12 | Last Updated: 2023-11-29 11:47:13

This data set describes nuclear microsatellite genotypes derived from ten autosomal loci (Aph8, Aph16, Cmo7, Cmo9, Hhi5, Sfi10, Smo4, Smo6, Smo8, Smo12) and nucleotide sequence data derived from one mitochondrial DNA locus (control region). A total of 262 Spectacled Eiders were examined for this study. Samples were collected at Indigirka and Chaun River Deltas, Russia, and Yukon-Kuskokwim Delta, Utqiagvik, Colville River Delta, Prudhoe Bay, Alaska. Samples used in the study originated from blood or feather samples collected in the field from live trapped birds or from tissue taken from dead birds.

DataID: 263 | doi:10.5066/P9F8DV8O | Date Posted Online: 2019-11-12 | Last Updated: 2020-11-10 15:42:59

These data are in three tables relating to a series of ponds, visited weekly over the summer of 2013, in the Chipp River Basin on the Arctic Coastal Plain of northern Alaska. The tables provide: 1) location and description of each of the ponds, 2) physical information on pond characteristics (area, volume, and temperature), water chemistry (electrical conductivity, dissolved oxygen, pH, ammonium, and total dissolved phosphorus and nitrogen, chlorophyll-a, and ash free dry mass), and 3) invertebrate counts. Four pond types were studied, including large and small thermokarst troughs, low-centered polygon ponds, and larger coalescent ponds. The ponds included a control group, and three manipulated groups, one heated passively, a second that was fertilized, and a third with netting to deter birds from landing on/near the pond.

DataID: 261 | doi:10.5066/P9K5EV4N | Date Posted Online: 2019-11-08 | Last Updated: 2022-04-21 15:44:17

This data set includes 15-minute interval data on stream temperature, stage, and discharge from low-order streams in the Noatak and Kobuk River valleys in Northwestern Alaska, collected during the summer months. Several sites in the Agashashok River basin were monitored in 2015 and 2016, and additional sites were added in 2017. The depth of the water and temperature were determined using a combined pressure transducer and temperature sensor that was deployed through the summer months. Different sensors were used in each stream and year, so a file is included detailing the stage and temperature accuracy for each year and stream. In rare instances in the fall, stage was estimated for certain streams (e.g. NFT3) based on remote camera images of the staff plate. Discharge was derived from the stage data by creating a rating curve relating stage to discharge measured during site visits.

DataID: 260 | doi:10.5066/P9EIX8ET | Date Posted Online: 2019-10-30 | Last Updated: 2022-04-21 15:43:30

This metadata document describes the data contained in the "processedData" folder of this data package. This data package contains all data collected by the Argos System from 129 satellite transmitters attached to Northern Pintail ducks on their winter range in Japan, 2007-2009. The raw data were processed to accomplish two goals: flag implausible location estimates and decode raw sensor data. Three Comma Separate Value (CSV) tables are included in the "processedData" folder of this data package: 1) the "diag_filteredLocations" table contains one record for every location estimate collected, accompanied by a binary flag that denotes an algorithm's plausibility check. Each record also includes a 'Tracking_Status' variable that denotes whether the location was collected from a live animal, a dead animal, or shed transmitter, 2) the "decodedSensor" table contains decoded sensor data such as a transmitter's temperature, battery voltage, and motion (activity), and 3) the "deploymentAttributes" table contains one record for each transmitter deployment in a CSV formatted table. The deployment attributes file contains information such as when the transmitter was attached to the animal, when tracking of a live animal ended, and a variety of variables describing the animal and transmitter. This table is identical to the "deploymentAttributes" table in the "rawData" folder of this data package.

DataID: 256 | doi:10.5066/P90A6HW3 | Date Posted Online: 2019-09-24 | Last Updated: 2019-09-24 09:49:53

This metadata document describes the data contained in the "rawData" folder of this data package. This data package contains all data collected by the Argos System from 129 satellite transmitters attached to Northern Pintail ducks on their winter range in Japan, 2007-2009. Five data files are included in the "rawData" folder of this data package. Two data files (with identical content) contain the raw Argos DIAG (Diagnostic) data, one in the legacy verbose ASCII format and one in a tabular Comma Separate Value (CSV) format. Two other data files (with identical content) contain the raw Argos DS (Dispose) data, one in the legacy verbose ASCII format and one in a tabular CSV format. The fifth file, "deploymentAttributes", contains one record for each transmitter deployment in a CSV formatted table. The deployment attributes file contains information such as when the transmitter was attached to the animal, when tracking of a live animal ended, and a variety of variables describing the animal and transmitter. This table is identical to the "deploymentAttributes" table in the "processedData" folder of this data package.

DataID: 257 | doi:10.5066/P90A6HW3 | Date Posted Online: 2019-09-24 | Last Updated: 2019-09-24 09:51:28

This metadata document describes the data contained in the "processedData" folder of this data package. This data package contains all data collected by the Argos System from 42 satellite transmitters attached to Blue-winged Teal ducks on their breeding range in Saskatchewan and Alberta (August 2013) and spring staging areas in Texas and Louisiana (March 2015). The raw data were processed to accomplish two goals: flag implausible location estimates and decode raw sensor data. Three Comma Separate Value (CSV) tables are included in the "processedData" folder of this data package: 1) the "diag_filteredLocations" table contains one record for every location estimate collected, accompanied by a binary flag that denotes an algorithm's plausibility check. Each record also includes a 'Tracking_Status' variable that denotes whether the location was collected from a live animal, a dead animal, or shed transmitter, 2) the "decodedSensor" table contains decoded sensor data such as a transmitter's temperature, battery voltage, and motion (activity), and 3) the "deploymentAttributes" table contains one record for each transmitter deployment in a CSV formatted table. The deployment attributes file contains information such as when the transmitter was attached to the animal, when tracking of a live animal ended, and a variety of variables describing the animal and transmitter. This table is identical to the "deploymentAttributes" table in the "rawData" folder of this data package.

DataID: 258 | doi:10.5066/P9Z9BA9F | Date Posted Online: 2019-09-24 | Last Updated: 2019-09-24 09:54:21

This metadata document describes the data contained in the "rawData" folder of this data package. This data package contains all data collected by the Argos System from 42 satellite transmitters attached to Blue-winged Teal ducks on their breeding range in Saskatchewan and Alberta (August 2013) and spring staging areas in Texas and Louisiana (March 2015). Five data files are included in the "rawData" folder of this data package. Two data files (with identical content) contain the raw Argos DIAG (Diagnostic) data, one in the legacy verbose ASCII format and one in a tabular Comma Separate Value (CSV) format. Two other data files (with identical content) contain the raw Argos DS (Dispose) data, one in the legacy verbose ASCII format and one in a tabular CSV format. The fifth file, "deploymentAttributes", contains one record for each transmitter deployment in a CSV formatted table. The deployment attributes file contains information such as when the transmitter was attached to the animal, when tracking of a live animal ended, and a variety of variables describing the animal and transmitter. This table is identical to the "deploymentAttributes" table in the "processedData" folder of this data package.

DataID: 259 | doi:10.5066/P9Z9BA9F | Date Posted Online: 2019-09-24 | Last Updated: 2019-09-24 09:54:39

Since the late 1950s, the USGS has maintained a long-term glacier mass-balance program at three North American glaciers. Measurements began on South Cascade Glacier, WA in 1958, expanding to Gulkana and Wolverine glaciers, AK in 1966, and later Sperry Glacier, MT in 2005. Additional measurements have been made on Lemon Creek Glacier, AK to compliment data collected by the Juneau Icefield Research Program (JIRP; Pelto and others, 2013). Direct field measurements are combined with weather data and imagery analyses to estimate the seasonal and annual mass balance at each glacier in both a conventional and reference surface format (Cogley and others, 2011). The analysis framework (O'Neel and others, 2019, van Beusekom and others, 2010) is identical at each glacier to enable cross-comparison between output time series. Vocabulary used follows Cogley and others (2011) Glossary of Glacier Mass Balance. This portion of the data release includes geodetic data used in mass balance analyses. The USGS uses geodetic data to quantify glacier area, glacier hypsometry, and the change in glacier volume and mass (e.g., Cogley and others 2011; Zemp and others 2013; van Beusekom and others, 2010; O'Neel and others 2014). Here we describe these basin-scale data, how they are produced, and the format in which they are preserved and disseminated. Gridded products comprise the first class of data and include orthorectified images and Digital Elevation Models (DEMs). Prior to the early 2000s, these grids were derived from aerial stereo photography or historic topographic maps. More recently, high-resolution space-borne imagery facilitated DEM and ortho-image production using approaches described herein. The second class of data are vector geospatial files of glacier margins. These are interpreted products, produced via manual digitization of the boundary between rock and ice identified from ortho-rectified images, or the boundary between neighboring glaciers identified from ice divide velocity maps. The third class of data are point data from GNSS surveys. These include post-processed points that represent mass balance stake locations, glacier surface elevations, installations, and points of interest on and around these glaciers.

DataID: 254 | doi:10.5066/P9R8BP3K | Date Posted Online: 2019-09-23 | Last Updated: 2022-02-22 13:07:36

Since the 1940s, the Juneau Icefield Research Program (JIRP) has been measuring surface mass balance on the Juneau Icefield. This is the longest ongoing program of its kind in North America. The program nominally occurs between late June and late August, traversing between Juneau, Alaska and Atlin, British Columbia. JIRP has examined the surface mass balance of the Juneau Icefield since 1946, with principal efforts focused on Lemon Creek Glacier and Taku Glacier. Glaciological, geodetic, and meteorological data have been collected by JIRP to characterize the interaction between the climate and glaciers of the Juneau Icefield. Direct field measurements of point glaciological data are combined with weather and geodetic data to estimate the seasonal and annual mass balance at each glacier in both a conventional and reference surface format (Cogley and others, 2011). The basic analysis framework (O'Neel, 2019, McNeil and others, 2019) is the same at each glacier to enable cross-comparison between output time series. For Taku and Lemon Creek glaciers, temperature lapse rates are optimized using on-icefield weather data. This changes the degree day factor in the melt model, giving small post-geodetic calibration differences on the order of 2-3 cm. Details are described in McNeil (2019). Vocabulary used follows Cogley and others (2011) Glossary of Glacier Mass Balance.

This portion of the data release includes geodetic data used in mass balance analyses. The USGS uses geodetic data to quantify glacier area, glacier hypsometry, and the change in glacier volume and mass (e.g., Cogley and others 2011; Zemp and others 2013; van Beusekom and others, 2010; O'Neel and others 2014). Here we describe these basin-scale data, how they are produced, and the format in which they are preserved and disseminated.

Gridded products comprise the first class of data and include orthorectified images and Digital Elevation Models (DEMs). Prior to the early 2000s, these grids were derived from aerial stereo photography or historic topographic maps. More recently, high-resolution space-borne imagery facilitated DEM and ortho-image production using approaches described herein.

The second class of data are vector geospatial files of glacier margins. These are interpreted products, produced via manual digitization of the boundary between rock and ice identified from ortho-rectified images, or the boundary between neighboring glaciers identified from ice divide velocity maps. Additional data for Lemon Creek Glacier, part of the Juneau Icefield, is available in a separate data release of USGS Benchmark Glacier geodetic data at https://doi.org/10.5066/P9R8BP3K. The data is documented but is not included here in order to avoid duplication.

DataID: 255 | doi:10.5066/P90RCN51 | Date Posted Online: 2019-09-23 | Last Updated: 2019-09-23 15:43:45

This data set contains one table of the habitat classifications from imagery captured during aerial photographic surveys at the five primary Pacific black brant colonies on the Yukon-Kuskokwim Delta in western Alaska from 1993-2016.

DataID: 252 | doi:10.5066/P9CJ2YZQ | Date Posted Online: 2019-09-05 | Last Updated: 2019-09-04 15:21:30

This data set contains bill and tarsal measurements from 114 Bristle-thighed Curlews, captured on breeding grounds in Alaska, and non-breeding areas in Hawaii and Reitoru atoll, French Polynesia.

DataID: 253 | doi:10.5066/P9X8J7ST | Date Posted Online: 2019-09-05 | Last Updated: 2020-09-05 14:31:37

This data set contains one table with mark-resight observations of Bristle-thighed Curlews marked on Oahu, Hawaii, with plastic color leg flags, 2012-2017.

DataID: 251 | doi:10.5066/P93VHNK3 | Date Posted Online: 2019-08-26 | Last Updated: 2019-08-26 16:16:20

This dataset includes information on the carbon samples that were collected from organic and mineral soils, streams, algae, invertebrates, and fish in the Arctic Network Parks.

DataID: 250 | doi:10.5066/P9NAUIQR | Date Posted Online: 2019-08-15 | Last Updated: 2023-09-06 14:26:43

Tracking Data Maps

DataID: 246 | doi:10.5066/P9ZRJ3XU | Date Posted Online: 2019-07-31 | Last Updated: 2023-02-15 16:46:29

Understanding the short- and long-distance movements of wildlife is critical for a wide variety of ecological research studies and management decisions. Since the mid-1980s, the USGS Alaska Science Center has collected data from wildlife tracking devices to: determine locations of animals throughout their annual cycles, understand patterns of habitat use, quantify time spent on various behaviors, determine timing of life cycle events, and identify geographic areas repeatedly used by wildlife that may be of significance to other species and populations.

These datasets are a collection of the USGS Alaska Science Center wildlife tracking data arranged by species or closely allied species groups. Details of tracking projects, devices, methods, and data can be found within each species directory.

DataID: 247 | doi:10.5066/P9VYSWEH | Date Posted Online: 2019-07-31 | Last Updated: 2019-07-31 12:41:33

This metadata document describes the data contained in the "processedData" folder of this data package. This data package contains all data collected by the Argos System from nine satellite transmitters attached to Marbled Godwits on their breeding range in southwest Alaska, USA. The raw data were processed to accomplish two goals: flag implausible location estimates and decode raw sensor data. Three Comma Separate Value (CSV) tables are included in the "processedData" folder of this data package: 1) the "diag_filteredLocations" table contains one record for every location estimate collected, accompanied by a binary flag that denotes an algorithm's plausibility check. Each record also includes a 'Tracking_Status' variable that denotes whether the location was collected from a live animal, a dead animal, or shed transmitter, 2) the "decodedSensor" table contains decoded sensor data such as a transmitter's temperature, battery voltage, and motion (activity), and 3) the "deploymentAttributes" table contains one record for each transmitter deployment in a CSV formatted table. The deployment attributes file contains information such as when the transmitter was attached to the animal, when tracking of a live animal ended, and a variety of variables describing the animal and transmitter. This table is identical to the "deploymentAttributes" table in the "rawData" folder of this data package.

DataID: 248 | doi:10.5066/P9NORY48 | Date Posted Online: 2019-07-31 | Last Updated: 2019-07-31 14:35:05

This metadata document describes the data contained in the "rawData" folder of this data package. This data package contains all data collected by the Argos System from nine satellite transmitters attached to Marbled Godwits on their breeding range in southwest Alaska, USA. Five data files are included in the "rawData" folder of this data package. Two data files (with identical content) contain the raw Argos DIAG (Diagnostic) data, one in the legacy verbose ASCII format and one in a tabular Comma Separate Value (CSV) format. Two other data files (with identical content) contain the raw Argos DS (Dispose) data, one in the legacy verbose ASCII format and one in a tabular CSV format. The fifth file, "deploymentAttributes", contains one record for each transmitter deployment in a CSV formatted table. The deployment attributes file contains information such as when the transmitter was attached to the animal, when tracking of a live animal ended, and a variety of variables describing the animal and transmitter. This table is identical to the "deploymentAttributes" table in the "processedData" folder of this data package.

DataID: 249 | doi:10.5066/P9NORY48 | Date Posted Online: 2019-07-31 | Last Updated: 2019-09-23 16:31:16

Since the late 1950s, the USGS has maintained a long-term glacier mass-balance program at three North American glaciers. Measurements began on South Cascade Glacier, WA in 1958, expanding to Gulkana and Wolverine glaciers, AK in 1966, and later Sperry Glacier, MT in 2005. Additional measurements have been made on Lemon Creek Glacier, AK to compliment data collected by the Juneau Icefield Research Program (JIRP; Pelto and others, 2013). Direct field measurements are combined with weather data and imagery analyses to estimate the seasonal and annual mass balance at each glacier in both a conventional and reference surface format (Cogley and others, 2011).

High-altitude measurements of meteorological data have been collected since the beginning of the USGS Benchmark Glacier Program adjacent to glaciers in order to support related science. This portion of the data release includes select weather data that has received basic quality control and assurance. Data is released at three different levels of processing, level 0, 1 and 2. Level 0 data contains compiled raw data, before QC procedures are applied, at the original timestep recorded by the instrument. Level 1 data has received a plausible value check, and minimal manual error identification (e.g. errors noted on field visits). Level 2 data has been through more extensive quality control procedures and is provided at both the original instrument timestep as well as aggregated hourly and daily values. However, beyond the procedures detailed in this document, no additional steps have been taken to manually assure quality of the data. Data outside the main record of temperature and precipitation at each site should be considered preliminary, and be utilized with increased scrutiny.

USGS Benchmark Glacier Project Comprehensive Data Collection

DataID: 233 | doi:10.5066/P9EUXIPE | Date Posted Online: 2019-07-24 | Last Updated: 2019-09-05 16:23:00

Since the 1940s, the Juneau Icefield Research Program (JIRP) has been measuring surface mass balance on the Juneau Icefield. This is the longest ongoing program of its kind in North America. The program nominally occurs between late June and late August, traversing between Juneau, Alaska and Atlin, British Columbia. JIRP has examined the surface mass balance of the Juneau Icefield since 1946, with principal efforts focused on Lemon Creek Glacier and Taku Glacier. Glaciological, geodetic, and meteorological data have been collected by JIRP to characterize the interaction between the climate and glaciers of the Juneau Icefield.

Measurements of meteorological data are made at many permanent camp facilities on the Juneau Icefield. This portion of the data release includes select weather data that has received basic quality control and assurance. Data is released at three different levels of processing, level 0, 1 and 2. Level 0 data contains compiled raw data, before QC procedures are applied, at the original timestep recorded by the instrument. Level 1 data has received a plausible value check, and minimal manual error identification (e.g. errors noted on field visits). Level 2 data has been through more extensive quality control procedures and is provided at both the original instrument timestep as well as aggregated hourly and daily values. Data at many JIRP sites consist of a single temperature sensor, recording in a Stevenson-type shield. Automated weather stations at Camp 10, 17, and 18 have measured additional meteorological variables in recent years. Both are presented in this data release.

DataID: 245 | doi:10.5066/P9DUI71J | Date Posted Online: 2019-07-09 | Last Updated: 2019-09-05 16:20:54

The data package "Sea Otter Aerial Survey Data from Glacier Bay National Park and Preserve, 1999-2012" provides raw data for examining abundance and distribution of northern sea otters (Enhydra lutris kenyoni) in Glacier Bay National Park and Preserve in southeast Alaska, based on data collected during a series of population-wide aerial surveys. The USGS aerial sea otter surveys have been completed multiple times using consistent methodology involving aerial-based counts. The surveys provide data and a population estimate that Park and other Federal management agencies use for decision making and planning additional research. This data package includes a series of files with the raw digital data that was used for population estimates and population modeling found in related manuscripts.

DataID: 244 | doi:10.5066/P9SBAFF6 | Date Posted Online: 2019-07-02 | Last Updated: 2019-07-29 12:41:44

This data set is four spreadsheets with: 1) the body condition and egg counts of Sockeye Salmon captured at several sites along the Pilgrim River 2013-2016, 2) water temperature from 10 automated temperature dataloggers during the summers of 2013-2016, 3) results from an experiment to determine the effect of elevated water temperature on levels of Heat Shock Protein (HSP70) in captive juvenile Sockeye Salmon and 4) the geographic coordinates of temperature dataloggers and fish capture sites.

DataID: 243 | doi:10.5066/P9B7G8SX | Date Posted Online: 2019-06-24 | Last Updated: 2020-10-09 12:01:36

This data set contains three spreadsheets with results of Influenza A Virus (IAV) screening in blood from Pacific, Red-throated, and Yellow-billed Loons at three locations in Alaska. Loons were captured along the Beaufort Sea Coast, Chukchi Sea Coast, and Yukon-Kuskokwim Delta from 2008-2017. Three different tests were used and the results are presented in separate spreadsheets. All serum samples were screened for IAV antibodies using a blocking enzyme-linked immunosorbent assay (bELISA). A subsample were screened using agar gel immunodiffusion (AGID), and hemagglutination inhibition assays (HI).

DataID: 242 | doi:10.5066/P9YVG9ME | Date Posted Online: 2019-06-19 | Last Updated: 2019-07-29 12:41:44

This data set consists of two tables associated with a study of Haemosporidian parasite infection in Northwestern Crows (Corvus caurinus) sampled at six locations throughout southcentral and southeast Alaska in 2007-2008. The first table contains species, location, banding, and morphometric data for all samples. The second table contains results from heamosporidian parasite screening of crow blood samples using molecular techniques. Genomic DNA was extracted from blood samples and screened for the presence of Haemoproteus, Plasmodium, and Leucocytozoon blood parasites using a nested-PCR method. Parasite genetic data is provided as GenBank accession numbers for any samples that tested positive for haemosporidian infection.

DataID: 241 | doi:10.5066/P9EBB1LG | Date Posted Online: 2019-06-17 | Last Updated: 2019-07-29 12:41:44

This data set includes information on collections of fecal samples from wild gulls (Larus spp.) at seven locations in Alaska, USA. Samples were screened for carbapenemase producing Escherichia coli (E. coli) and tested for resistance to multiple antibiotics.

DataID: 239 | doi:10.5066/P9391PBK | Date Posted Online: 2019-06-14 | Last Updated: 2019-07-29 12:41:44

This data set includes two tables associated with a study of Plasmodium parasite infection in mosquitoes collected in south-central Alaska during the summer of 2016. The first table contains data regarding mosquito collection from three sites using CO2 baited CDC light traps. Mosquitoes were sorted and pooled according to collection date, genus, and location and subsequently screened for Plasmodium parasite infection using molecular methods. The second table contains results of Plasmodium parasite screening of pooled mosquito abdomen and head/thorax segments using PCR. Parasite genetic data is provided as GenBank accession numbers for any samples that tested positive for Plasmodium infection.

DataID: 240 | doi:10.5066/P9J4ZOJR | Date Posted Online: 2019-06-14 | Last Updated: 2019-07-29 12:41:44

Data set containing avian influenza A virus (IAV) sampling information for Emperor Geese in Alaska, 2015-2017. The data are in three tables: 1) collection data and IAV screening results from fecal samples at several sites in southwestern Alaska, 2) results of blocking enzyme-linked immunosorbent assay (bELISA) tests for IAV antibodies in blood serum collected from nesting female Emperor geese near the Manokinak River on the Yukon-Kuskokwim River Delta, and 3) results of influenza virus microneutralization assays to test for the specific IAV subtypes in the Manokinak samples.

DataID: 238 | doi:10.5066/P9VFN3JD | Date Posted Online: 2019-05-13 | Last Updated: 2019-05-13 12:22:48

This data set contains a description of 3 mitochondrial DNA and 93 nuclear DNA Single Nucleotide Polymorphism (SNP) loci and sequence information developed through double digest restriction-site associated DNA sequencing (ddRADseq) techniques for Greater White-Fronted Goose (Anser albifrons) that winter in California.

DataID: 236 | doi:10.5066/P9LYUFRH | Date Posted Online: 2019-04-23 | Last Updated: 2020-11-10 15:42:43

This data set contains individual museum catalog numbers, associated Genbank accession numbers, and species designations based on the mitochondrial genome and ten nuclear loci for 55 Martes americana, 28 Martes caurina, 2 Martes of uncertain taxonomic designation based on genetic data alone, and one each of Martes zibellina, M. pennanti, Gulo gulo, Neovison vison, and Mustela frenata.

DataID: 237 | doi:10.5066/P9V1L0SI | Date Posted Online: 2019-04-23 | Last Updated: 2020-11-10 15:42:55

This data release contains a mark-resight encounter history table for Pacific and Yellow-billed loons from the Arctic Coastal Plain in northern Alaska, 2011-2014.

DataID: 235 | doi:10.5066/F7HH6J9C | Date Posted Online: 2019-04-22 | Last Updated: 2019-07-29 12:41:43

This data set includes information on collections of fecal or cloacal samples from wild gulls (Larus spp.) at four locations on the Kenai Peninsula, Alaska, USA. Samples were also collected from sockeye salmon harvested as part of the personal-use fisheries on the Kenai and Kasilof Rivers. Samples were screened for Escherichia coli (E. coli) and tested for resistance to multiple antibiotics.

DataID: 234 | doi:10.5066/P9D72Q3W | Date Posted Online: 2019-04-04 | Last Updated: 2019-08-02 14:50:18

This dataset contains two tables of sampling information and size and mass measurements of the Baltic Tellin (Macoma balthica) from sites in Cook Inlet, Alaska, USA, and the Baie de Somme estuary, France.

DataID: 232 | doi:10.5066/P9PY1ULV | Date Posted Online: 2019-03-26 | Last Updated: 2019-09-06 13:45:05

This data set documents the age, length, dry mass energy density, and dry mass of age-0 and age-1 Pacific sand lance captured in Prince William Sound Alaska each July from 2012 to 2016. The analysis of this data was published in von Biela et al. 2019 (doi:10.3354/meps12891).

DataID: 231 | doi:10.5066/P96N5PVE | Date Posted Online: 2019-03-21 | Last Updated: 2019-07-29 12:41:43

This dataset contains migration timing and land-based location information from nine Marbled Godwits (Limosa fedoa beringiae) equipped with solar-powered satellite transmitters on breeding grounds near Ugashik, Alaska, in June of 2008. Transmitters were programmed with a duty cycle of 10 hr on and 48 hr off, yielding 10,858 locations (47-3,490 locations per bird, depending on the duration of each transmitter's functional deployment). This dataset provides summarized timing and location data for each transmittered bird.

DataID: 227 | doi:10.5066/F7XK8DTM | Date Posted Online: 2019-03-01 | Last Updated: 2019-07-29 12:41:43

These data are from a stratified random survey to inventory the birds breeding in lowlands (elevation below 100m) of the Alaska Peninsula, during summers 2004-2007. Data were collected at 792 points on 52 5-km x 5-km plots.

The Data are in seven tables: 1) geographic coordinates of the bounding corners of each of the 52 plots, 2) geographic coordinates of each of the 792 bird count points, 3) counts and behavioral observations of shorebirds and avian predators during 10-min bird point counts, 4) counts of all other bird species encountered during 10-min bird point counts, 5) vegetative cover at each of the bird count points, 6) summary of all bird species encountered on each of the 52 plots before, during, and after the 10-min bird point counts, and 7) bird taxonomy references.

The Raw Data are eight PDF files of digitally scanned original (raw) field data forms describing each of the 792 points and 52 plots. The Habitat Photos are a ZIP package containing 2824 JPEG photos of vegetation at the survey points.

DataID: 228 | doi:10.5066/P9FR8FLZ | Date Posted Online: 2019-03-01 | Last Updated: 2022-05-05 11:28:11

These data (in two spreadsheets) are the results of screening for influenza A viruses (IAV) in blood from wild animals that utilize the Arctic region of Alaska. 758 blood samples from nine wildlife species (3 mammal, 6 waterbird) were collected in Arctic Alaska, 2011-2017. Two different tests were used and the results are presented in separate spreadsheets. All blood samples were screened for IAV antibodies using a blocking enzyme-linked immunosorbent assay (bELISA). A subsample of 63 blood samples were screened by hemagglutination inhibition (HI) assays to identify hemagglutinin (HA) subtype-specific antibodies for comparison among taxa.

DataID: 226 | doi:10.5066/P9FPXQTP | Date Posted Online: 2018-12-19 | Last Updated: 2019-07-29 12:41:43

These data are part of the Gulf Watch Alaska (GWA) long-term monitoring program and describe bivalve count and size sampling and observations conducted at intertidal soft-sediment sampling sites in the northern Gulf of Alaska. This dataset consists of five comma separated files (.csv): 1) bivalve taxonomy table, 2) bivalve sampling site table, 3) bivalve count table, 4) bivalve size table, and 5) list of Gulf Watch Alaska principal investigators and collaborators.

DataID: 225 | doi:10.5066/F71834N0 | Date Posted Online: 2018-11-15 | Last Updated: 2023-10-30 16:09:16

This data set contains two data sets. One data set is of U-Pb isotopic data and associated ages of detrital zircon grains from 16 sedimentary and metasedimentary rocks from the western Alaska Range, Livengood area and Seward Peninsula, Alaska. Two samples were collected from the York Mountains area of the Seward Peninsula of western Alaska. Three samples were collected from the Livengood quadrangle of central Alaska. Eleven samples were collected from the western Alaska Range of south-central Alaska. Detrital zircon grains from each of the sixteen samples were separated and analyzed by Apatite to Zircon, Inc. (A2Z) and Geosep Services (GSS) laboratories between 2011 and 2014, using laser-ablation-inductively-coupled-plasma-mass spectrometry (LA-ICP-MS) techniques. The second data set contains fossil identifications and age assignments from a select sedimentary rock from the western Alaska Range of south-central Alaska. Fossils were identified by visual inspection. All samples were collected as part of geological mapping research conducted between 1984 and 2014 and funded by the Mineral Resources Program of the U.S. Geological Survey.

DataID: 224 | doi:10.5066/F7PV6JKZ | Date Posted Online: 2018-11-13 | Last Updated: 2020-09-11 12:47:56

This dataset contains measures of oxygen consumption and stroke frequency from 1 captive subadult female polar bear (166.5 kg) resting in the water (n = 7 sessions) and swimming and diving in a metabolic swim flume with water circulated at approximately 0.6 km/hr during swimming and diving measurements (n = 6 sessions) in September 2017.

DataID: 222 | doi:10.5066/P98IQWT4 | Date Posted Online: 2018-11-06 | Last Updated: 2019-07-29 12:41:43

Data set containing test results of screening blood and serum samples from five populations of Brown Bears in Alaska. Samples were tested to detect current or previous exposure to bacteria (Brucella spp., Francisella tularensis, and Leptospira spp.), viruses (canine adenovirus, canine distemper virus, canine parvovirus, and influenza A virus), and parasites (Toxoplasma gondii, and Trichinella spp.).

DataID: 223 | doi:10.5066/P94FFEUJ | Date Posted Online: 2018-11-06 | Last Updated: 2019-07-29 12:41:43

U.S. Geological Survey researchers conducted time-series ground-penetrating radar (GPR) surveys with a Sensors and Software 500-MHz Pulse Ekko Pro system. This data release contains ground-based (ski and snowmobile) as well as airborne common-offset profiles. All profiles are linked to coincident GPS observations. Additionally, common-midpoint data was collected at specific glacier locations. Coincident in-situ data may provide calibration information, and may be composed of any of the following: snow pits and/or snow-pit/snow-core combinations, probe profiles, and ablation stake data. This supplemental information provides estimates of snow properties which may be used to calibrate radar velocity.

DataID: 156 | doi:10.5066/F7M043G7 | Date Posted Online: 2018-09-27 | Last Updated: 2022-03-11 14:09:30

This data release includes two summary geospatial rasters in GeoTIFF format indicating the seasonal Pacific walrus distribution apparent from from ARGOS location tracking obtained from the temporary attachment of ARGOS transmitter tags to Pacific walruses between 1987 and 2015. We deployed tags on walruses at locations in the eastern and northern Bering Sea, the eastern Chukchi Sea, and southern coast of the western Chukchi Sea. We estimated daily locations and characterized seasonal distributions (May-November and December-April) across the Pacific Arctic on a coarse grid (50km resolution).

DataID: 221 | doi:10.5066/F7VH5N43 | Date Posted Online: 2018-09-24 | Last Updated: 2019-07-29 12:41:43

These data are the responses of researchers, managers, community members, and tour guides who live or work in polar bear habitats anywhere within their range to inquiries about the types, frequency, and potential impacts of recreational activities. Respondents answered a series of questions on their background and experience with polar bears and the geographic area in which they are familiar. Respondents then indicated how common specific types of recreations are in the area in which they are familiar and whether various types of potential impacts were perceived or had been observed to occur. Finally, respondents prioritized a list of management actions and research needs.

DataID: 220 | doi:10.5066/F7J67F31 | Date Posted Online: 2018-09-14 | Last Updated: 2019-07-29 12:41:43

This data set provides low-temperature thermochronometric data from 16 rock samples collected from the Revelation Mountains area in western Alaska Range. These data are from three different analyses used to estimate cooling ages: 1) apatite (U-Th)/He, 2) zircon (U-Th)/He, and 3) apatite fission-track.

DataID: 219 | doi:10.5066/P9ZNIHT7 | Date Posted Online: 2018-09-13 | Last Updated: 2020-09-11 12:53:42

This USGS Data Release presents major-oxide glass geochemical results from tephras erupted form Alaska volcanoes. This data set is in support of volcano hazard studies by the Alaska Volcano Observatory (AVO) where tephra (volcanic ash) deposits are used to assess eruption frequency, magnitude, and character of eruption. These data are part of a larger effort to identify and characterize tephra deposits from Alaskan volcanoes and the data set will continue to grow (versioned) as new data are generated.

DataID: 217 | doi:10.5066/P9PFQGVC | Date Posted Online: 2018-08-28 | Last Updated: 2020-09-11 12:52:22

These files provide the complete data release for the paper entitled, "Frequent large tsunamis spanned locked/creeping parts of the Aleutian megathrust." The data set consists of nine tables that include radiocarbon dates, cesium-137 activity, grain size measurements, and scanning X-ray fluorescence element intensity counts.

DataID: 218 | doi:10.5066/P9D7KLJV | Date Posted Online: 2018-08-28 | Last Updated: 2020-10-05 16:24:41

This data set describes nuclear microsatellite genotypes derived from eight autosomal loci (BCA6, BCA9, BCA11, BCA5, CRG, OXY13, TSP1.20.09 and TSP1.20.46) and a 366 base pair portion of the mitochondrial control region. A total of 665 Greater White-fronted Geese were examined by genotyping and 518 by sequencing with samples coming from its circumpolar range representing multiple flyways (Midcontinent, Pacific, Greenland, Palearctic). The sex of most samples was determined in the field by morphology or cloacal examination.

DataID: 126 | doi:10.5066/F71G0JGN | Date Posted Online: 2018-08-13 | Last Updated: 2020-11-10 15:42:02

This dataset contains results of genetic screening for Poecivirus from samples of black-capped chickadees (BCCH; Poecile atricapillus) with and without clinical signs of avian keratin disorder (AKD). Data include information on detection/non-detection of the virus in tissue collected with buccal swabs, cloacal swabs, blood samples, and fecal samples from up to 124 individuals between 2015 and 2017 from various locations in southcentral Alaska. For an additional 17 symptomatic (and one asymptomatic) individual(s) collected between 2001 and 2015 in the same region, data include measurements of viral load in beak tissue measured by qRT-PCR as well as the amount of actively replicating virus detected by 7 negative-strand and 2 positive-strand oligonucleotide probes, all relative to amounts of host RNA. Ancillary data on beak measurements, clinical signs of AKD (beak overgrowth or hyperkeratosis at the cellular level), locations, and dates of collection are also included for each individual.

DataID: 215 | doi:10.5066/P93OCR4L | Date Posted Online: 2018-07-13 | Last Updated: 2019-07-29 12:41:43

This data set includes information on collections of fecal or cloacal samples from wild birds at the landfill in Soldotna, Alaska, USA. Samples were screened for Escherichia coli (E. coli) and tested for resistance to multiple antibiotics.

DataID: 214 | doi:10.5066/F70V8C2Q | Date Posted Online: 2018-07-09 | Last Updated: 2019-07-29 12:41:43

This dataset includes two spreadsheets associated with a study of three genera of blood parasites (Leucocytozoon, Haemoproteus, Plasmodium) in 185 Spectacled Eiders (Somateria fischeri) sampled in Alaska, 2008-2012. The first spreadsheet provides age, sex, location, and blood parasite (hematozoa) infection data for three different genera of blood parasites. Hematozoa DNA, from eider blood samples, was detected by amplifying a 479bp fragment of the Cytochrome-b gene using a nested PCR technique with primers specific for the three target hematozoa genera. Amplicons were sequenced and assigned to genera by the nucleotide BLAST function of the NCBI GenBank database. Infection data are provided as NCBI GenBank accession numbers for DNA sequences obtained from samples that tested positive for infection. The second spreadsheet provides the geographic coordinates of the five sampling sites.

DataID: 213 | doi:10.5066/P9CDBRDC | Date Posted Online: 2018-06-28 | Last Updated: 2019-07-29 12:41:43

Oxygen consumption and kinematic measurement data and tri-axial acceleration measurement data from 2 captive polar bears and 7 captive grizzly bears resting and walking in a metabolic chamber.

DataID: 211 | doi:10.5066/F7QR4W91 | Date Posted Online: 2018-06-25 | Last Updated: 2019-07-29 12:41:43

This data set contains information (in two spreadsheets) from the monitoring of nests of Pacific, Yellow-billed and Red-throated loons at two 64 km2 sites in the National Petroleum Reserve-Alaska (NPR-A) during the summers of 2011-2014. We categorized each nest site by the physical aspects of the lake and proximity to other nesting loons. To determine nest fate (incubating, nest successful, nest failed), nests were revisited and inspected at least once a week. During each nest visit, we estimated embryo development (to predict hatch dates) by floating eggs. Nests were considered successful if one or more chicks hatched.

DataID: 212 | doi:10.5066/F74F1Q0D | Date Posted Online: 2018-06-25 | Last Updated: 2022-11-28 10:21:32

This metadata document describes the data contained in the "processedData" folder of this data package. This data package contains all data collected by the Argos System from 32 satellite transmitters attached to Whimbrels on their breeding range in arctic and western Alaska, 2006-2010. The raw data were processed to accomplish two goals: flag implausible location estimates and decode raw sensor data. Three Comma Separate Value (CSV) tables are included in the "processedData" folder of this data package: 1) the "diag_filteredLocations" table contains one record for every Argos location estimate collected, accompanied by a binary flag that denotes an algorithm's plausibility check (based on distance, turning angle, and rate thresholds). Each record also includes a 'Tracking_Status' variable that denotes whether the location was collected from a live animal, a dead animal, or shed transmitter, 2) the "decodedSensor" table contains decoded sensor data such as the transmitter's temperature, battery voltage, and motion (activity), and 3) the "deploymentAttributes" table contains one record for each transmitter deployment in a CSV formatted table. The deployment attributes file contains information such as when the transmitter was attached to the animal, when tracking of a live animal ended, and a variety of variables describing the animal and transmitter. This table is identical to the "deploymentAttributes" table in the "rawData" folder of this data package.

DataID: 205 | doi:10.5066/P978PX2X | Date Posted Online: 2018-06-11 | Last Updated: 2022-03-10 08:37:29

This dataset contains sampling, molecular methods, and partial tRNA-Leu DNA sequence information for three individual Frullania nisquallensis.

DataID: 204 | doi:10.5066/P92H3W9D | Date Posted Online: 2018-05-31 | Last Updated: 2020-11-10 15:42:35

This dataset contains sampling information and genetic data of 12 novel microsatellite loci developed and polymorphic in the Sea Sandwort (Honckenya peploides) and screened in Merckia (Wilhelmsia physodes) from Alaska. The allele sizes for the 12 microsatellite loci developed in this study are included for two populations of Sea Sandwort (Fossil Beach, Kodiak and Egg Bay, Atka) and one population of Merckia (upper Coleen River, Brooks Range).

DataID: 203 | doi:10.5066/F7BC3XRP | Date Posted Online: 2018-05-22 | Last Updated: 2020-11-10 15:42:33

These data are nutrient concentrations of seven key forage-plant species in the ranges of three caribou herds, in northern Alaska. During the growing seasons of 2011-2014, we collected forage samples from 21 plots within the ranges of three caribou herds: Central Arctic Herd (2011-2013), Teshekpuk (2011-2013), Western Arctic (2013-2014). We also analyzed stable isotopes of carbon (13C), nitrogen (15N) and sulfur (34S) in key plants. Further, we included of soil chemistry measures within the sampling range.

DataID: 202 | doi:10.5066/F7JQ106W | Date Posted Online: 2018-05-21 | Last Updated: 2022-03-18 15:42:35

Data set containing avian influenza sampling information for late summer and early autumn waterfowl and gulls within and around the Izembek National Wildlife Refuge (NWR), Alaska, 2011-2016. Data contains species, age, sex, collection data and location of sampled migratory birds. Laboratory specific data used to identify presence and absence of influenza A viruses (IAVs) from collected samples are included.

DataID: 200 | doi:10.5066/F7JD4W2W | Date Posted Online: 2018-04-06 | Last Updated: 2022-10-18 12:01:32

These data are part of the Gulf Watch Alaska (GWA) long term monitoring program, nearshore monitoring component. Specifically, these data describe sea otter (Enhydra lutris) aerial survey observations from the waters around Katmai National Park and Preserve from surveys conducted in 2008, 2012, 2015, and 2018. Sea otters are a keystone predator, well known for structuring the nearshore marine ecosystem through their consumption of invertebrate prey. The dataset consists of 3 comma-delimited files (CSV) exported from Microsoft Excel. The data consists of (1) Strip transect counts, (2) Intensive Search Unit (ISU) counts, and (3) Transect coordinates. For each aerial survey, a pilot flew an airplane at an altitude of 91 meters over pre-determined transects while an observer searched on one side of the plane and recorded sea otter group counts and locations. Sea otters observed within 400 meters of each transect were later used to estimate abundance. Sea otters sighted beyond the confines of designated transect swaths were also counted and mapped, time permitting. To estimate the number of sea otters in small groups (<20) not detected along transect swaths (e.g., due to diving behavior or the presence of kelp canopy), 400 meter diameter circles (i.e. ISUs) were searched intensively by periodically flying 5 concentric circles around an initiating group. These ISUs were distributed throughout the survey area in an attempt to accurately represent the full range of observation conditions encountered during the survey. When large groups of sea otters (>=20) were sighted on transect, they were circled until a complete count was made. Data are presented as three CSV files: KATM sea otter strip transect counts in dd.csv, KATM sea otter ISU counts.csv, KATM sea otter survey transect coordinates in dd.csv

DataID: 199 | doi:10.5066/F7930SG7 | Date Posted Online: 2018-04-04 | Last Updated: 2020-03-25 15:23:04

Fragment data from 11 nuclear microsatellite loci and sequence data from the mitochondrial cytochrome b gene were gathered from Arctic cod (Boreogadus saida) in the Beaufort and Chukchi seas. Mitogenomic analyses of Arctic cod and three other co-distributed gadoids (Polar cod [Arctogadus glacialis], Saffron cod [Eleginus gracilis], Walleye Pollock [Gadus chalcogrammus]) were also completed. Transcriptomic analyses of Arctic cod were used to identify genes associated with environmental perturbations. Genome-wide scans using RAD-Seq of Arctic cod and the co-distributed Polar Cod were collected.

DataID: 198 | doi:10.5066/F7CF9P23 | Date Posted Online: 2018-04-02 | Last Updated: 2020-11-10 15:42:29

Observation data and model covariate data from breeding bird inventory conducted during May-June 2004 and 2008 primarily in montane areas (>100 m above sea level) in Aniakchak National Monument and Preserve (Aniakchak NMP), Katmai National Park and Preserve (Katmai NPP), and Lake Clark National Park and Preserve (Lake Clark NPP) in southwestern Alaska. Observers conducted 1,021 point counts along 169 transects within 63 10-km × 10-km plots that were randomly selected and stratified by ecological subsection.

DataID: 197 | doi:10.5066/F7MW2GD3 | Date Posted Online: 2018-03-30 | Last Updated: 2019-07-29 12:41:43

This data set documents the dry mass energy density, distribution, and stomach contents of age-0 chum salmon (Oncorhynchus keta) captured in the Kuskokwim Bay estuary in May and June 2004. The analysis of this data was published in Burrill et al. 2018 (DOI :10.1007/s00300-018-2297-2.).

DataID: 196 | doi:10.5066/F7PZ57P7 | Date Posted Online: 2018-03-26 | Last Updated: 2020-10-09 12:01:17

Since the late 1950s, the USGS has maintained a long-term glacier mass-balance program at three North American glaciers. Measurements began on South Cascade Glacier, WA in 1958, expanding to Gulkana and Wolverine glaciers, AK in 1966, and later Sperry Glacier, MT in 2005. Additional measurements have been made on Lemon Creek and Taku glaciers, AK to compliment data collected by the Juneau Icefield Research Program (JIRP; Pelto et al., 2013). Direct field measurements of point glaciological data are combined with weather and geodetic data to derive glacier-wide seasonal and annual surface mass balance solutions of each glacier in conventional and reference surface formats (Cogley et al., 2011). Additional details on the calculation of glacier-wide surface mass balance are described in Van Beusekom et al. (2010).

This dataset contains point raw glaciological field data. Snow pit and snow core data give detailed information on snow density through the measured snow column. Snow depth measurements are collected via snow probe and in some snow pits or snow cores that extend the full depth of the snowpack to the glacier's surface. Ablation stakes allow point measurement of both snow depth and snow melt against the reference of the labeled stake. Draw wires provide additional measurements of snow and ice melt, against the invariant reference of the labeled wire. It is used to calculate point mass balance, or the mass balance at a specified location on the glacier.

USGS Benchmark Glacier Project Comprehensive Data Collection

DataID: 194 | doi:10.5066/F76Q1WHK | Date Posted Online: 2018-03-08 | Last Updated: 2022-03-14 11:12:10

Since the late 1950s, the USGS has maintained a long-term glacier mass-balance program at three North American glaciers. Measurements began on South Cascade Glacier, WA in 1958, expanding to Gulkana and Wolverine glaciers, AK in 1966, and later Sperry Glacier, MT in 2005. Additional measurements have been made on Lemon Creek Glacier, AK to compliment data collected by the Juneau Icefield Research Program (JIRP; Pelto and others, 2013). Direct field measurements of point glaciological data are combined with weather and geodetic data to estimate the seasonal and annual mass balance at each glacier in both a conventional and reference surface format (Cogley and others, 2011). The analysis framework (O'Neel, 2019; prior to v 3.0 van Beusekom and others, 2010) is identical at each glacier to enable cross-comparison between output time series. Vocabulary used follows Cogley and others (2011) Glossary of Glacier Mass Balance.

Datasets included:

Glacier-Wide Mass Balance and Input Data: USGS Benchmark Glaciers

Point Raw Glaciological Data: Ablation Stake, Snow Pit, and Probed Snow Depth Data on USGS Benchmark Glaciers, 1981-2016

DataID: 195 | doi:10.5066/F7BG2N8R | Date Posted Online: 2018-03-08 | Last Updated: 2019-07-29 12:41:42

Tracking Data Maps

DataID: 193 | doi:10.5066/F7RV0MK4 | Date Posted Online: 2018-02-26 | Last Updated: 2019-07-29 12:41:42

This data set contains four tables of information regarding the sampling of plant biomass, nitrogen, cumulative thaw degree days, precipitation, and Normalized Difference Vegetation Index (NDVI) for the Colville River Delta and Point Lonely area of northern Alaska.

DataID: 186 | doi:10.5066/F7M907KT | Date Posted Online: 2018-02-15 | Last Updated: 2020-11-12 12:01:51

In the North Pacific Ocean and Bering Sea between August 2012-2014, data were collected on sea surface temperature and salinity data, marine bird and mammal surveys, hydroacoustic backscatter data, marine environment surrounding Tufted Puffin colonies, and body condition and diets of Tufted Puffin chicks.

DataID: 187 | doi:10.5066/F7TQ60GV | Date Posted Online: 2018-02-15 | Last Updated: 2019-07-29 12:41:42

This data release includes remotely sensed lake and lake chemistry and water temperature data collected from 2011 to 2014) from a series of lakes on the Arctic Coastal Plain of Alaska. Most of the data is from two sites within the Chipp River Basin.

DataID: 185 | doi:10.5066/F7BC3XHJ | Date Posted Online: 2018-02-12 | Last Updated: 2019-07-29 12:41:42

A major challenge of wildlife telemetry is choosing an attachment technique that maximizes transmitter retention while minimizing negative side effects. For waterbirds, attachment of transmitters with subcutaneous anchors has been an effective and well-established technique, having been used on >40 species. This method was recently modified to include a second subcutaneous anchor, presumably increasing transmitter retention beyond that of single-anchor attachments. This putative benefit may be offset, however, by increased health risks related to additional incisions and subcutaneous protrusions. To test this potential trade-off, we attached radio transmitters to surf scoters (Melanitta perspicillata) and white-winged scoters (M. fusca) during the flightless remigial molt and winter using single- (121 scoters) and double-anchor (128 scoters) attachment techniques. The data described here are generated by this research project. Results of this work are published in the journal Wildlife Society Bulletin.

DataID: 184 | doi:10.5066/F79S1PZJ | Date Posted Online: 2018-01-24 | Last Updated: 2019-07-29 12:41:42

These data are the data for age, skull size, body length, and lean mass for Gates of the Arctic, Lake Clark, Kodiak, and Katmai, Alaska, 2013-2016.

DataID: 183 | doi:10.5066/F7MS3R0C | Date Posted Online: 2018-01-16 | Last Updated: 2019-07-29 12:41:42

These data represent estimates of den entrance and exit dates for female polar bears in the southern Beaufort and Chukchi Seas based on temperature sensor data obtained from satellite collars. An algorithm described in Olson et al. (2017) was used to determine whether the female entered a den and further analyses using temperature data as described in Olson et al. (2017) were used to assess den entry and emergence dates. The algorithm used identified the denning period as that during which collar temperature remained consistently above a temperature threshold. As such, users of these data should be aware that bear behavior can affect den entrance and exit date. If a bear moves in and out of a den frequently, the algorithm identifies that bear as not denning. Den substrate was determined by examining satellite locations from collars during the identified denning period and classify dens as occurring on landfast ice, pack ice, or land. This data set also includes direct observations of females post-den emergence to ascertain whether or not she was accompanied by cubs as an indicator of reproductive success. The den IDs provided in this data set correspond with those identified in the USGS den catalog (Durner 2010, Durner et al 2020) additional information about the dens in this data set may be found in the catalog.

DataID: 181 | doi:10.5066/F7DF6PC9 | Date Posted Online: 2018-01-12 | Last Updated: 2021-07-23 12:39:24

This dataset contains data from the use of bioelectrical impedance analysis and deuterium injection as methods to estimate the body composition of female polar bears in the southern Beaufort Sea subpopulation. Data are provided on bioelectrical impedance resistance measures, the enrichment level of deuterium oxide that was injected and measured in blood samples, and morphological measures.

DataID: 182 | doi:10.5066/F7ZP447H | Date Posted Online: 2018-01-12 | Last Updated: 2019-07-29 12:41:42

This dataset provides information on fish species composition and their diet information for 16 lakes and 16 ponds at two locations on the central Arctic Coastal Plain, Alaska. In one table, we provide the presence of fish species and the total species count for each lake or pond sampled. This table also includes metrics of surface water connectivity to the stream network. In a second table, stomach content information is provided for fish collected during summer sampling periods (late June to mid-August) over three years (2011-2013). The third table includes stable carbon isotope and stable nitrogen isotope signature data for fish species and snails (the baseline organism) from 16 water bodies at one study location in 2013.

DataID: 180 | doi:10.5066/F7TQ60CH | Date Posted Online: 2018-01-09 | Last Updated: 2019-07-29 12:41:42

This set of data files are the appendices for paper titled Transgressive-regressive cycles in the metalliferous, oil shale-bearing Heath Formation (Upper Mississippian), central Montana. The dataset consists of 8 appendices, including a histogram of solid bitumen and vitrinite Ro values, gas chromatograms, isotopic data, organic and inorganic geochemical analyses, and x-ray diffraction mineralogy data.

DataID: 173 | doi:10.5066/F7668BPP | Date Posted Online: 2018-01-08 | Last Updated: 2019-07-29 12:41:42

This data release comprises 4 datasets used to measure the field metabolic rate, body composition, foraging success, behavior, and movement patterns of 9 female polar bears on the sea ice of the Beaufort Sea in April, 2014-2016 as well as 1 dataset used to measure the energetic cost of resting in an adult female polar bear at the San Diego Zoo, San Diego, CA. Wild bears were dosed with and had their blood analyzed for oxygen-18 and deuterium concentrations, equipped with GPS-enabled satellite video camera collars with tri-axial accelerometers, and blood was measured for serum urea and creatinine levels. The bear at the San Diego Zoo had her oxygen consumption measured while resting in a metabolic chamber.

DataID: 174 | doi:10.5066/F7XW4H0P | Date Posted Online: 2018-01-08 | Last Updated: 2023-06-29 15:40:01

These data are the data for spring body composition and energy content for adult female brown bears from Gates of the Arctic, Lake Clark, Kodiak, and Katmai, Alaska, 2014-2017.

DataID: 171 | doi:10.5066/F7CZ35ND | Date Posted Online: 2018-01-05 | Last Updated: 2019-07-29 12:41:42

Tracking Data Maps

DataID: 172 | doi:10.5066/F7CV4GX2 | Date Posted Online: 2018-01-05 | Last Updated: 2019-07-29 12:41:42

These data are part of the Gulf Watch Alaska (GWA) long term monitoring program, nearshore monitoring component. The dataset is a series of comma separated files exported from a survey software program (DLog, Ford Consulting, Portland, OR). The data consists of date, time, latitude, longitude, species abbreviation, count, and behavior. Each year the observers attempt to sample the same set of transects although weather, tide state and other factors can interfere with this goal. Transects are in Alaska and include locations in Katmai National Park and Preserve and Kenai Fjords National Park. Other researchers conduct similar surveys in Prince William Sound. The time interval includes 2012-2016.

DataID: 170 | doi:10.5066/F7416V6H | Date Posted Online: 2017-12-18 | Last Updated: 2019-07-29 12:41:42

This metadata document describes the data contained in the "processedData" folder of this data package. This data package contains all data collected by the Argos System from 92 satellite transmitters attached to Red-throated Loons on their breeding range in coastal areas throughout Alaska, 2000-2010. The raw data were processed to accomplish two goals: flag implausible location estimates and decode raw sensor data. Three Comma Separate Value (CSV) tables are included in the "processedData" folder of this data package: 1) the "diag_filteredLocations" table contains one record for every location estimate collected, accompanied by a binary flag that denotes an algorithm's plausibility check. Each record also includes a 'Tracking_Status' variable that denotes whether the location was collected from a live animal, a dead animal, or shed transmitter, 2) the "decodedSensor" table contains decoded sensor data such as a transmitter's temperature, battery voltage, and motion (activity), and 3) the "deploymentAttributes" table contains one record for each transmitter deployment in a CSV formatted table. The deployment attributes file contains information such as when the transmitter was attached to the animal, when tracking of a live animal ended, and a variety of variables describing the animal and transmitter. This table is identical to the "deploymentAttributes" table in the "rawData" folder of this data package.

DataID: 169 | doi:10.5066/F7TH8KVH | Date Posted Online: 2017-12-11 | Last Updated: 2020-02-19 12:06:36

This metadata document describes the data contained in the "rawData" folder of this data package. This data package contains all data collected by the Argos System from 92 satellite transmitters attached to Red-throated Loons on their breeding range in coastal areas throughout Alaska, 2000-2010. Five data files are included in the"rawData" folder of this data package. Two data files (with identical content) contain the raw Argos DIAG (Diagnostic) data, one in the legacy verbose ASCII format and one in a tabular Comma Separate Value (CSV) format. Two other data files (with identical content) contain the raw Argos DS (Dispose) data, one in the legacy verbose ASCII format and one in a tabular CSV format. The fifth file, "deploymentAttributes", contains one record for each transmitter deployment in a CSV formatted table. The deployment attributes file contains information such as when the transmitter was attached to the animal, when tracking of a live animal ended, and a variety of variables describing the animal and transmitter. This table is identical to the "deploymentAttributes" table in the "processedData" folder of this data package.

DataID: 280 | doi:10.5066/F7TH8KVH | Date Posted Online: 2017-12-11 | Last Updated: 2020-02-19 12:05:56

This data set includes information on collections of fecal or cloacal samples from wild birds at two locations in Alaska, USA. Samples were screened for Escherichia coli (E. coli) and tested for resistance to multiple antibiotics using a variety of methods.

DataID: 168 | doi:10.5066/F7SF2TPW | Date Posted Online: 2017-12-07 | Last Updated: 2019-07-29 12:41:42

This data release comprises 3 datasets used to develop forecasts of autumn body condition for adult female Pacific walruses in the Chukchi Sea during mid and late century time periods. The activity dataset contains daily telemetry records for 218 adult female walruses tracked for periods of 7 to 104 days during 2008-2014, in the Chukchi Sea. Records include the number of hours the walrus was in the water, number of hours the walrus was foraging, study area region where the walrus was located, depths of the foraging locations, and the proportion of the region covered by sea ice. The movement dataset contains telemetry records for 94 of these walruses, giving the dates they moved from one region to another, and the date of the beginning of minimum ice period for that year. The projected-ice dataset contains daily projections of ice conditions in the study area regions derived from 7 general circulation models of future ice availability for mid-century (2045-2054) and late-century (2090-2099) time periods. The movement and activity datasets were developed to model walrus activity and movement as functions of sea ice conditions. The projected-ice dataset was developed to provide input for those models to forecast future walrus activity and movement. Forecasting autumn body condition requires linkage to bioenergetics models.

DataID: 167 | doi:10.5066/F7XG9Q2T | Date Posted Online: 2017-11-29 | Last Updated: 2019-07-29 12:41:42

These are genetic data collected from replicated samples of 21 Enteroctopus (E. dofleini or a cryptic lineage) in Prince William Sound Alaska to evaluate tissue type, DNA extraction method, and time until analyses are completed on data reliability. Data collected from all samples include two microsatellites identified as possible lineage indicators, and nine microsatellite loci previously identified as polymorphic in both lineages. DNA sequence data from 528 bp of the octopine dehydrogenase (OCDE) gene were also collected.

DataID: 166 | doi:10.5066/F7VM49HJ | Date Posted Online: 2017-11-20 | Last Updated: 2020-11-10 15:42:24

This data set provides sample information, microsatellite genotype, and NCBI accession numbers for mitochondrial DNA sequences of peregrine falcons (Falco peregrinus) from North America and Russia.

DataID: 164 | doi:10.5066/F7F18WV0 | Date Posted Online: 2017-11-17 | Last Updated: 2022-10-05 10:37:11

Crested (Aethia cristatella) and Least Auklets (Aethia pusilla) are crevice-nesting birds that breed in large mixed colonies at relatively few sites in the Aleutian Chain, Bering Sea, Gulf of Alaska and Sea of Okhotsk. Time-lapse imagery of nesting habitat was collected over the summers of 2010, 2012, and 2013 to assess use of the primary pre-eruption colony site. At-sea surveys collected relative abundance data to identify shifts in distributions of Crested and Least Auklets around Kasatochi and Koniuji Islands.

DataID: 165 | doi:10.5066/F7513WDS | Date Posted Online: 2017-11-17 | Last Updated: 2019-07-29 12:41:42

This data set describes nuclear microsatellite genotypes derived from twenty-one autosomal loci (Fal02, Fal04, Fal07, Fal08, Fal10, Fal12, Fal14-1, Fal16, Fal 17, Fal19, Gch03, Gch06, Gch07, Gch12, Gch13, Gch14, Gch17, Gch19, Pho110, KiRa9-1, and KiRa10) and nucleotide sequence data derived from two mitochondrial DNA loci (control region and NADH dehydrogenase 2). Samples were collected on Oahu, Kauai, Molokai, Hawaii, United States of America. Samples used in the study originated from blood or feather samples collected in the field from live trapped birds or from tissue taken from dead birds or museum specimens according to each institution's load policies and procedures. We compared historical (samples collected in the late 1800s and early 1900s) and modern (collected in 2012-2015) populations.

DataID: 163 | doi:10.5066/F74Q7SXC | Date Posted Online: 2017-10-23 | Last Updated: 2020-11-10 15:41:05

These data are serum urea nitrogen and creatinine levels for polar bears captured in the southern Beaufort Sea 1983-2016 and the Chukchi Sea 1987-1993 and 2008-2017. The dataset includes relevant information about the bears that were captured including the latitude and longitude of their capture location, capture date, age class and sex, the age and number of cubs accompanying an adult female, and whether the bear denned during the previous winter or exhibited signs of being engaged in mating behavior at the time of or just prior to capture.

DataID: 162 | doi:10.5066/F7SQ8XJC | Date Posted Online: 2017-10-17 | Last Updated: 2021-01-21 12:15:12

This data set contains allele sizes for 30 individuals of 9 previously published and 20 novel microsatellite loci and the molecular sex verification (n = 31) of Emperor Geese (Chen canagica) from various locations across Alaska. The allele sizes for the 20 microsatellite loci developed in this study are included for 10 White-fronted Geese (Anser albifrons) from Selawik, 11 Black Brant (Branta bernicla nigricans) from Kigigak Island, 10 Canada Geese (Branta canadensis) from Copper River Delta, and 9 Cackling Geese (Branta hutchinsii) from lower Kashunuk River (Hock Slough) and Tutakoke River.

DataID: 161 | doi:10.5066/F71V5C4S | Date Posted Online: 2017-10-03 | Last Updated: 2023-07-07 08:50:52

SUPERSEDED data release

No data are available from this page. Data from previous Gulf Watch nearshore water and air temperature sampling data releases have been combined with additional data in an updated U.S. Geological Survey data release.

DataID: 160 | doi:10.5066/F77S7KXH | Date Posted Online: 2017-09-25 | Last Updated: 2022-07-26 09:31:15

This dataset consists of survey data, plots, photos, and a photo index from a cross section survey of the Eklutna River at the Glenn Highway bridge in Alaska. The cross sections were surveyed in 2016 and 2017 using a total station, then adjusted to match datums for a Municipality of Anchorage orthophoto and Alaska Department of Transportation and Public Facilities bridge as-built elevations.

DataID: 159 | doi:10.5066/F7TT4PGD | Date Posted Online: 2017-09-20 | Last Updated: 2019-07-29 12:41:42

These data are part of the Gulf Watch Alaska (GWA) long term monitoring program, nearshore monitoring component. Specifically, these data describe sea otter (Enhydra lutris) aerial survey observations from the waters around Kenai Fjords National Park between 2002 and 2016. Sea otters are a keystone predator, well known for structuring the nearshore marine ecosystem through their consumption of invertebrate prey. The dataset consists of 3 comma delimited files exported from Microsoft Excel. The data consists of 1. Strip transect counts, 2. Intensive Search Unit (ISU) counts, and 3. Transect coordinates. For each aerial survey, a pilot flew an airplane at an altitude of 91m over pre-determined transects while an observer searched on one side of the plane and recorded sea otter group counts and locations. Sea otters observed within 400 m of each transect were later used to estimate abundance. Sea otters sighted beyond the confines of designated transect swaths were also counted and mapped, time permitting. To estimate the number of sea otters in small groups (<20) not detected along transect swaths (e.g., due to diving behavior or the presence of kelp canopy), 400m diameter circles (i.e. ISUs) were searched intensively by periodically flying 5 concentric circles around an initiating group. These ISUs were distributed throughout the survey area in an attempt to accurately represent the full range of observation conditions encountered during the survey. When large groups of sea otters (≥20) were sighted on transect, they were circled until a complete count was made.

DataID: 158 | doi:10.5066/F7CJ8BN7 | Date Posted Online: 2017-09-19 | Last Updated: 2019-07-29 12:41:42

This data set contains information regarding the sampling of avian influenza viruses from mallard ducks at locations in Anchorage and Fairbanks, Alaska 2012-2015. Data pertaining to wild birds (mallards) sampled includes band numbers, age and sex, location and timing of sampling. Laboratory specific data is also included and used to identify presence and absence of avian influenza viruses either during active infection or previous exposure (serostatus).

DataID: 157 | doi:10.5066/F7CZ3626 | Date Posted Online: 2017-08-10 | Last Updated: 2019-07-29 12:41:42

These are genetic data collected from over 700 individual coho salmon (Oncorhynchus kisutch) from 17 streams and rivers within Glacier Bay Alaska and 2 rivers outside the bay. Data collected from all samples include one nuclear gene intron, Growth Hormone-1, and eight microsatellite loci.

DataID: 155 | doi:10.5066/F7V98657 | Date Posted Online: 2017-07-25 | Last Updated: 2020-11-10 15:42:06

This data release contains three tables of information on behavior and productivity of greater white-fronted geese nesting near Point Lonely, Alaska, 2013-2014: transcriptions of nest photographs obtained by time-lapse photography at 1-minute intervals in 2013 and 2014, and characteristics of nests monitored with cameras and via periodic nest visits during 2013-2014. Data were collected as part of the USGS Changing Arctic Ecosystems Initiative to understand the effects of industrial and researcher disturbance on Arctic-nesting geese.

DataID: 154 | doi:10.5066/F7NV9GP9 | Date Posted Online: 2017-07-24 | Last Updated: 2019-07-29 12:41:41

The dynamics of the linked river systems draining Exit and Paradise Glaciers have been dependent on glacial and fluvial controls since the 1800s. This data release contains maps of historical Exit and Paradise creek and glacier positions, 2013 channel survey and particle size data, and a 2012 digital elevation model and orthophoto for the Exit and Paradise glacier forelands, Alaska.

DataID: 140 | doi:10.5066/F75T3HJZ | Date Posted Online: 2017-06-21 | Last Updated: 2019-07-29 12:41:41

To demonstrate connectivity between terrestrial and marine ecosystems, we used stable (δ13C, δ15N, δ2H) and radiogenic (∆14C) isotopes to estimate the relative contribution of glacier runoff and terrestrial-derived organic matter (OM) to marine food webs. This dataset contains information on isotopic signatures from dissolved organic matter (DOM), dissolved inorganic matter (DIC) and particulate organic matter (POM), mussels, plankton, fish and seabirds near tidewater glaciers during the peak melt in summer 2012-2013 in Prince William Sound and the Western Aleutians, Alaska.

DataID: 139 | doi:10.5066/F7Z036D9 | Date Posted Online: 2017-06-20 | Last Updated: 2020-12-09 11:04:49

This data set includes capture location, date, sex, and results of molecular gene transcription analysis for sea otters (Enhydra lutris) sampled in western Prince William Sound (WPWS), Alaska and comparison samples collected from Kodiak and the Alaska Peninsula, and reference samples collected from captive animals. Samples were collected between 2005 and 2012. (Molecular gene transcription is the process by which information from the DNA template of a particular gene is transcribed into messenger RNA (mRNA) and eventually translated into a functional protein. The amount of mRNA transcribed from a particular gene is physiologically dictated. Altered levels of gene transcripts provide observable signs of health impairment.)

DataID: 138 | doi:10.5066/F789141P | Date Posted Online: 2017-06-16 | Last Updated: 2019-07-29 12:41:41

This data contains two tables of live-dead encounter histories of Black Brant geese banded 4 breeding locations in the Arctic of northern Alaska and western Canada and one sub-Arctic location, the Tutakoke River colony on the Yukon-Kuskokwim Delta of Alaska, from 1990 to 2016.

DataID: 136 | doi:10.5066/F76971SZ | Date Posted Online: 2017-06-15 | Last Updated: 2019-07-29 12:41:41

This data set refines potential peregrine falcon nest habitat within the National Petroleum Reserve - Alaska (NPR-A), aids in the interpretation of nest site selection and potential habitat based on the surface geology and geomorphology of the region, determines the key characteristics for the selection of nest sites in known nesting locations relatively to optimal sites in areas without known nesting occurrence, and helps in developing strategies for detecting potential shifts in the distribution of potential nesting habitat. Components of the data development included conducting geospatial analysis using digital elevation models, high-resolution remotely sensed imagery, and geomorphology. This GIS dataset consists of 16,141 bluff features (extracted from 5m resolution IfSAR data) and provides information on spatial geometry, relational distance information, surface geology, and other important conditions.

DataID: 137 | doi:10.5066/F7ZG6QRZ | Date Posted Online: 2017-06-15 | Last Updated: 2022-04-18 11:59:36

This dataset provides information needed to reproduce a digital model of the Nogahabara Dune Field located in interior Alaska. The Nogahabara Dunes represent one of three active inland dune fields found in Alaska today. In an effort to update geospatial coverage of the dunes lidar data was collected over Nogahabara Sand Dunes in September 2015 using a 1955 Cessna 180 aircraft equipped with a Riegl brand LMS-Q240i laser scanner. The scanner was set to 10,000 laser shots per second and a +/- 30 degree beam sweep and flown over the Koyukuk National Wildlife Refuge's Nogahabara sand dunes. The flight pattern was designed for 50 percent overlap between each adjacent swath to achieve 2 points per square meter over the entire coverage. The lidar scanner was rigidly attached to a OXTS brand Inertial+2 GPS/IMU unit, which was being fed by a Trimble R7 GPS receiver. The resultant survey achieved 1.4 points per square meter. Discrete-return point cloud data are available in the LAS format.

DataID: 134 | doi:10.5066/F7QF8RB7 | Date Posted Online: 2017-06-14 | Last Updated: 2022-04-18 11:59:27

This data release contains one table of data from a two-year study of Greater White-fronted Goose (Anser albifrons frontalis) molting ecology conducted in the Teshekpuk Lake Special Area within the National Petroleum Reserve - Alaska in 2012 and 2013.

DataID: 135 | doi:10.5066/F7PR7TG8 | Date Posted Online: 2017-06-14 | Last Updated: 2019-07-29 12:41:41

This data set contains information from recording devices that were set to record regularly during summer breeding seasons. A single observer listened to 2692 recordings, noting which species were heard during each 10-min recording. We used this information to examine how avian detectability varied by day of season, time of day, and ambient temperature. All study locations were in northwestern Alaska, on the Seward Peninsula, and recordings were taken between May 25 and July 26 in 2013 and 2014.

DataID: 133 | doi:10.5066/F7B856KG | Date Posted Online: 2017-06-09 | Last Updated: 2021-07-09 15:08:40

Three geographic maps showing the Russian Far East.

DataID: 85 | doi:10.5066/F7B27SFD | Date Posted Online: 2017-06-08 | Last Updated: 2019-07-29 12:41:40

The dataset is the daily count of Sockeye Salmon (Oncorhynchus nerka) passing through a fish counting weir on the Pilgrim River from 2003 to 2014. Also, included in the data set is the daily temperature and river height measured at the weir (65.103071°, -164.824046°). The fish weir was operated during the summer (late June to mid-September) by the Norton Sound Economic Development Corporation.

DataID: 131 | doi:10.5066/F71834PF | Date Posted Online: 2017-05-05 | Last Updated: 2020-10-09 12:01:32

These are data collected from Wildlife Computers ear tag platform transmitter terminals (PTT) deployed on polar bears in the southern Beaufort Sea during the months of March, April, August, September, and October between 2009 and 2011.

DataID: 130 | doi:10.5066/F7057D4R | Date Posted Online: 2017-05-04 | Last Updated: 2019-07-29 12:41:41

This dataset provides four digital elevation models derived from airborne lidar data acquired over four separate areas along and adjacent to the Fairweather Fault along the remote Gulf of Alaska coast within Glacier Bay National Park. In 1958, the Fairweather Fault in southeast Alaska ruptured over 260 km between Yakutat Bay and Cross Sound, producing the magnitude 7.8 Lituya Bay earthquake. To better understand the extent of surface rupture and identify sites to investigate for evidence of past earthquakes, the USGS Alaska Science Center collaborated with the National Park Service, the Army Corps of Engineers' Cold Regions Research and Engineering Laboratory (CRREL), and the National Center for Airborne Lidar Mapping (NCALM) at the University of Houston to collect over 166 square kilometers of high-resolution airborne lidar (Light Detection and Ranging) data. CRREL developed and deployed the Helipod lidar system, designed for use on a Robinson R44 Raven II helicopter, to acquire more than 34.4 million laser measurements. The measurements have vertical and horizontal accuracies of +/-10 cm. NCALM processed the lidar data to remove laser returns from vegetation and enhance laser returns from the ground surface. The derivative "bare-Earth" data include 1.4 to 2.3 laser returns per square meter, which were used to produce 1-m-per-pixel digital elevation models (DEM) for four areas between Lituya Bay and Icy Point.

DataID: 129 | doi:10.5066/F7W094D4 | Date Posted Online: 2017-05-03 | Last Updated: 2020-10-08 13:25:13

These are data from cruises carried out in April, May and July 2010 from the Copper River (AK) mouth to beyond the shelf break, ~150 km from shore. The focus of the dataset is the iron (Fe) data, intended to help infer the processes controlling concentrations of Fe. The data include concentrations of total dissolvable Fe (TDFe), dissolved Fe (dFe), nitrate, and salinity, temperature and fluorescence data (CTD) as background. This also includes sea surface height deviation data for a two month interval when a Yakutat eddy passed by the sampling site. Also included is a simple 1-dimensional numerical model used to simulate the the April DFe data assuming a DFe flux from shelf sediments, horizontal transport by eddy diffusion, and removal by scavenging. Data from eight model simulations are also included.

DataID: 128 | doi:10.5066/F7222S06 | Date Posted Online: 2017-04-28 | Last Updated: 2019-07-29 12:41:41

These data are part of the Gulf Watch Alaska (GWA) long-term monitoring program, nearshore monitoring component. The dataset is comprised of six comma separated values (.csv) file exported from a relational database. The data consist of: 1) transect summary, 2) nest details, 3) egg float and stage data, 4) chicks diets, 5) chick diet taxonomy, and 6) Gulf Watch Alaska contributors.

DataID: 127 | doi:10.5066/F7WH2N5Q | Date Posted Online: 2017-04-25 | Last Updated: 2023-11-15 10:59:16

These data are part of the Gulf Watch Alaska (GWA) long term monitoring program, pelagic monitoring component.

DataID: 117 | doi:10.5066/F74J0C9Z | Date Posted Online: 2017-04-18 | Last Updated: 2024-03-22 14:11:43

An animal's energetic costs are dependent on the amount of time it allocates to various behavioral activities. For Arctic pinnipeds, the time allocated to active and resting behaviors could change with future reductions in sea ice cover and longer periods of open water. The Pacific walrus (Odobenus rosmarus divergens) is a large Arctic pinniped that rests on sea ice or land between foraging trips to feed on the seafloor. This dataset contains behavioral data collected from 216 radio-tagged adult female walruses instrumented in the Chukchi Sea (2008–2014) that formed the basis of a Bayesian generalized linear mixed effects model that investigated probability that a walrus was in water foraging, in water not foraging, or hauled out, as a function of environmental covariates. The data are structured such that each line represents an hour of behavior collected during every third hour of the UTC day (hours 0 through 21), which was associated with temperature and wind metrics derived from the North American Regional Reanalysis dataset, as well as an index of the daily availability of sea ice based on the daily National Ice Center's Marginal Ice Zone product and an index of the availability of land. Each record presents the walrus behavior recorded during the record's hour, the previous hour, and the subsequent hour.

DataID: 116 | doi:10.5066/F7XD0ZTG | Date Posted Online: 2017-04-12 | Last Updated: 2019-07-29 12:41:41

This data set contains information on blood chemistry and hematological parameters of captive Pacific Common Eiders (Somateria mollissima v-nigrum) for reference periods and after satellite transmitter implantation.

DataID: 115 | doi:10.5066/F7MG7MR0 | Date Posted Online: 2017-04-07 | Last Updated: 2019-07-29 12:41:41

The eastern section of the Denali Fault did not rupture during the 2002 Denali Fault earthquake (Mw 7.9), however seismologic, geodetic, and geomorphic evidence along with a paleoseismic record of several past ground-rupturing earthquakes demonstrate the fault is active. Thick vegetation, along with complex glacial landforms, large braided rivers, and fault-parallel bedrock structure (e.g., bedding) obscure the Eastern Denali Fault's surface expression. Plafker and Clague mapped the fault in Alaska and Yukon respectively, providing the basis for generalized digital maps of the structure. While the generalized fault trace maps provide basic information for seismic hazard models (i.e., approximate fault location, total length), detailed fault trace maps may reveal information about past rupture length and offset, complementing paleoseismic information and informing future field investigations.

DataID: 111 | doi:10.5066/F7T151WC | Date Posted Online: 2017-04-05 | Last Updated: 2019-07-29 12:41:40

This data was produced as part of a subsurface tracer experiment performed on a boreal hillslope in July, 2015. The data is separated into three files: 'Well Data.csv' includes the location and depth of well screens, concentrations of the bromide tracer in time, saturation state of the subsurface at the wells, ground cover at the wells, and depth of the organic-mineral boundary which controls shallow flow. 'Probe data.csv' includes thaw depth, gravel presence, and vegetation type within the well field. 'Breakthroughs.csv' includes solute concentrations in time from wells that displayed robust breakthroughs. The data includes electrical conductivity and bromide measurements, and a column that combines these two solutes based on a significant linear relationship between the two.

DataID: 110 | doi:10.5066/F70C4T0V | Date Posted Online: 2017-04-04 | Last Updated: 2019-07-29 12:41:40

Data set pertaining to avian paramyxovirus (APMV-1) sequences used in phylogenetic analyses. Data contains GenBank Accession numbers, host species common name and taxonomic order, collection year, and collection location.

DataID: 109 | doi:10.5066/F7MP51GP | Date Posted Online: 2017-03-31 | Last Updated: 2019-07-29 12:41:40

This study focuses on a 67 attribute lake cover classification scheme covering the Bering Land Bridge area of the Seward Peninsula, Alaska. The GIS dataset consists of 5170 lakes (which were extracted from a 5m resolution ifSAR/orthophoto image) and provides information on lake morphometry, hydrologic connectivity, surface area dynamics, surrounding terrestrial ecotypes, bedfast percentage, and other important conditions. The Seward Peninsula lake habitat study classification system provides lake specific information for a coastal peninsula area that will guide research and aid in the management of the natural environment.

DataID: 108 | doi:10.5066/F7DF6PF6 | Date Posted Online: 2017-03-28 | Last Updated: 2022-04-18 11:59:17

These data are part of the Gulf Watch Alaska (GWA) long term monitoring program, nearshore monitoring component. Specifically, these data describe site locations for rocky intertidal, mussel sampling, soft sediment bivalve sampling, and eelgrass bed sampling in the northern Gulf of Alaska within the GWA program. The dataset consists of two comma separated files exported from a Microsoft Excel workbook. The data consists of 1. rocky intertidal, mussel sampling, and soft sediment site location information, and 2. eelgrass bed locations. Sampling will be conducted in Katmai National Park and Preserve (KATM), Kenai Fjords National Park (KEFJ), Prince William Sound (PWS) and to a lesser extent on the Lake Clark National Park and Preserve (LACL). Sites from a related project that provides similar data from Kachemak Bay (KBAY) are included here.

DataID: 107 | doi:10.5066/F78S4N3R | Date Posted Online: 2017-03-07 | Last Updated: 2023-08-31 09:51:05

This data is part of the Gulf Watch Alaska (GWA) long term monitoring program, benthic monitoring component and a seasonal diet study in Kenai Fjords National Park. The dataset is a comma separated file exported from a Microsoft Access database. The data consists of observations made of foraging sea otters (Enhydra lutris). Observers used Questar field model spotting scopes and binoculars to identify prey. Date, local time, dive duration, success, prey type, prey size, prey number, handling time and surface time are all recorded. Sites are in Alaska and include locations in Katmai National Park and Preserve, Kenai Fjords National Park and Prince William Sound. This data in this file were collected 2012-2016.

DataID: 106 | doi:10.5066/F7N29V4R | Date Posted Online: 2017-03-03 | Last Updated: 2020-08-18 13:26:57

These are data collected from two types of activity sensors housed within collars deployed on female polar bears in the Chukchi and southern Beaufort Seas during the months of July through October between 1989 and 2014. Mercury tip-switches were deployed 1989 to 2009 and accelerometers were deployed 2009-2014. Activity sensor readings were related to habitats used by polar bears as described in the methods below.

DataID: 105 | doi:10.5066/F7B27SCH | Date Posted Online: 2017-03-02 | Last Updated: 2019-07-29 12:41:40

This data release contains three tables of information from the Colville River Delta, Alaska (CDR): offtake of Carex subspathacea (2012-2014), standing crop of C. subspathacea (2012-2014), and snow goose and black brant gosling mass data (2012-2017). Data were collected as part of the USGS Changing Arctic Ecosystems Initiative to understand the response of wildlife to rapid physical changes taking place in the Arctic.

DataID: 103 | doi:10.5066/F72J692N | Date Posted Online: 2017-02-21 | Last Updated: 2020-11-12 12:03:10

SUPERSEDED data release

No data are available from this page. Data from previous Gulf Watch nearshore Mytilus sampling data releases have been combined with additional data in an updated U.S. Geological Survey data release.

DataID: 104 | doi:10.5066/F7WS8RD4 | Date Posted Online: 2017-02-21 | Last Updated: 2022-07-26 09:53:55

Marine ecosystems respond to a range of habitat variability in coastal zones modified by glacial freshwater outflows, biophysical data were collected in three study regions that included four major glacial fjord systems around the Gulf of Alaska. A suite of geographic, oceanographic, nutrient and biological attributes were sampled at these three study regions during peak ice-melt season in summer.

DataID: 95 | doi:10.5066/F7K072DR | Date Posted Online: 2017-02-10 | Last Updated: 2019-07-29 12:41:40

This data set includes age, sex, location, and blood parasite infection data from Blue-winged teal (Anas discors) captured in Canada (Alberta, Saskatchewan) and the USA (Texas, Louisiana) in 2012-2013. Infection data for three different genera of blood parasites are given as are GenBank accession numbers for genetic sequences obtained from positive infections.

DataID: 94 | doi:10.5066/F79C6VMW | Date Posted Online: 2017-02-09 | Last Updated: 2019-07-29 12:41:40

This data set consists of a time-series of direct measurements of glacier surface mass balance, at Eklutna Glacier, Alaska. It includes seasonal measurements of winter snow accumulation and summer snow and ice ablation.

USGS Benchmark Glacier Project Comprehensive Data Collection

DataID: 91 | doi:10.5066/F7MP51CB | Date Posted Online: 2017-01-12 | Last Updated: 2019-07-29 12:41:40

This dataset contains fatty acid data expressed as mass percent of total fatty acids for Chukchi Sea polar bears.

DataID: 90 | doi:10.5066/F7J38QP9 | Date Posted Online: 2017-01-11 | Last Updated: 2022-11-14 09:40:16

This data package contains three tables: avian counts by species, habitat type, a covariate information used for analysis of bird surveys conducted between 2012 and 2014 on the Seward Peninsula, Alaska, as part of the USGS Changing Arctic Ecosystems Initiative. We conducted 1,208 point counts on 12 study blocks from 2012–2014 in northwestern Alaska, using repeated surveys to account for imperfect detection of birds. We considered the importance of shrub height, density of low and tall shrubs (i.e. shrubs >0.5 m tall), percent of ground cover attributed to shrubs (including dwarf shrubs <0.5 m tall), and percent of herbaceous plant cover in predicting bird abundance.

DataID: 89 | doi:10.5066/F7CN722Z | Date Posted Online: 2017-01-04 | Last Updated: 2023-02-16 08:49:21

These data include two spreadsheets. The first is average daily temperatures received via satellite transmitting collars deployed on polar bears in the southern Beaufort Sea 1986-2013. The second is denning classifications for adult female polar bears in the southern Beaufort Sea using the temperature data. Denning was classified using a control chart-based algorithm applied to the temperature data received from the collars. This method was validated by comparisons with a previous study, direct observations during flights to track collared bears, and observations of females with newborn cubs the following spring. Further information is available in the methods.

DataID: 88 | doi:10.5066/F7BP00Z5 | Date Posted Online: 2017-01-03 | Last Updated: 2019-07-29 12:41:40

This data set includes capture information and ethoxyresorufin-O-deethylase (EROD) activity results for harlequin ducks sampled during March 2011, 2013, and 2014 in western Prince William Sound, Alaska.

DataID: 87 | doi:10.5066/F7KD1W1M | Date Posted Online: 2016-12-13 | Last Updated: 2019-07-29 12:41:40

Data set containing specimen information and GenBank accession numbers for five nuclear DNA introns and mitochondrial DNA control region sequence information for the blue-winged duck complex of species sampled in Africa, Asia, Australia, and North and South America.

DataID: 86 | doi:10.5066/F7T72FK7 | Date Posted Online: 2016-11-28 | Last Updated: 2023-07-06 16:32:24

This dataset contains fatty acid data expressed as mass percent of total fatty acids for several species potentially preyed upon by yellow-billed loons. These data were utilized in a quantitative fatty acid signature analysis to estimate the diet of yellow-billed loons nesting on the Arctic Coastal Plain of Alaska (Haynes et al. 2015).

DataID: 84 | doi:10.5066/F7H993BH | Date Posted Online: 2016-10-17 | Last Updated: 2022-11-14 09:40:14

These data are part of the Gulf Watch Alaska (GWA) long-term monitoring program. This dataset consists of date, time, and temperature measurements from intertidal rocky sampling sites, including predicted tide height at the time of the reading, which is used to distinguish air from water temperature readings. The data are provided as comma separated values (.csv) files derived from data downloaded from HOBO temperature loggers.

DataID: 83 | doi:10.5066/F7WH2N3T | Date Posted Online: 2016-09-30 | Last Updated: 2023-09-18 11:51:33

Sea ice loss represents a stressor to the Pacific walrus (Odobenus rosmarus divergens), which feeds on benthic macroinvertebrates in the Bering and Chukchi seas. However, no studies have examined the effects of sea ice on foraging walrus space use patterns. Thus, we examined walrus foraging resource selection as a function of proximity to resting substrates and prey biomass with a matched use-availability design. We quantified biomass of 17 benthic taxa, which included amphipods, bivalves, polychaete, sand dollars, tunicates, and sipunculids. We included covariates for distance to sea ice and distance to land, and systematically developed a series of candidate models to examine interactions among benthic prey biomass and resting substrates. We ranked candidate models with Bayesian Information Criterion and made inferences on walrus resource selection based on the top-ranked model. Biomass of the bivalve family Tellinidae, distance to ice, distance to land, and the interaction of distances to ice and land were in the top-ranked model. Standardized model coefficients indicated that distance to ice explained the most variation in walrus foraging resource selection patterns followed by Tellinidae biomass. Distance to land and the interaction of distances to ice and land accounted for similar levels of variation in foraging walrus resource selection. These data represent the used and available resource units with the covariates of distance to land and distance to ice.

DataID: 82 | doi:10.5066/F78G8HTX | Date Posted Online: 2016-09-12 | Last Updated: 2020-05-20 15:47:41

These data are part of the Gulf Watch Alaska (GWA) long-term monitoring program and describe mussel sampling and observations conducted in the northern Gulf of Alaska. This dataset consists of six comma separated files (.csv): 1) mussel sampling site layout information, 2) mussel counts for mussels greater than 20 millimeters in a quadrat, 3) mussel size measurements for mussels greater than 20 millimeters in a quadrat, 4) mussel counts for all mussels collected from core samples, 5) mussel size frequencies for all mussels collected from core samples, and 6) list of Gulf Watch Alaska principal investigators and collaborators.

DataID: 80 | doi:10.5066/F7FN1498 | Date Posted Online: 2016-08-24 | Last Updated: 2024-04-10 15:38:26

This study focuses on the development of a 20 attribute lake cover classification scheme for the Fish Creek Watershed (FCW), which is located in the National Petroleum Reserve-Alaska (NPR-A). The GIS dataset consists of 4,362 lakes (which were extracted from a 5m resolution IfSAR/orthophoto image) covering 18% of the 4,900 km2 FCW and provides information on lake morphometry, hydrologic connectivity, surface area dynamics, surrounding terrestrial ecotypes, and other important aquatic conditions. The FCW lake cover classification scheme provides lake specific information for an arctic watershed that will guide research and aid in the management of the natural and human-modified environment.

Project Page: Fish Creek Watershed Observatory

DataID: 78 | doi:10.5066/F7H70CXB | Date Posted Online: 2016-08-10 | Last Updated: 2020-02-27 10:22:03

This data set documents the carbon and nitrogen stable isotope ratios of age-0 Arctic cisco (Coregonus autumnalis) captured in Prudhoe Bay, Alaska in August 2009. The analysis of this data was published in von Biela et al. 2013 (Polar Biology 36:137-146, doi:10.1007/s00300-012-1244-x). All stable isotope results were provided by the University of Alaska Anchorage Environmental and Natural Resources Institute (ENRI) Stable Isotope Laboratory. The Stable Isotope Facility was led by Dr. Jeffery Welker and managed by Brian Cohn at the time of the analysis.

DataID: 76 | doi:10.5066/F7CZ3571 | Date Posted Online: 2016-08-04 | Last Updated: 2020-10-09 12:01:10

This data set documents the stomach contents of age-0 Arctic cisco (Coregonus autumnalis) captured in Prudhoe Bay, Alaska in August 2009. The analysis of this data was published in von Biela et al. 2013 (Polar Biology 36:137-146, doi:10.1007/s00300-012-1244-x). The data consists of counts of specific zooplankton taxa from individual fish stomachs.

DataID: 77 | doi:10.5066/F74F1NVS | Date Posted Online: 2016-08-04 | Last Updated: 2020-10-09 12:01:14

Tracking Data Maps

DataID: 75 | doi:10.5066/F77M060G | Date Posted Online: 2016-07-25 | Last Updated: 2019-07-29 12:41:40

This data package includes two tables of data for Bristle-thighed curlews (Numenius tahitiensis) captured 2012-2014 on the James Campbell National Wildlife Refuge O'ahu, Hawaii (21.68 N, 157.95 W). One table provides capture, banding, morphology, and genetic data. The second table provides mark-resight data for estimating the size of the wintering population on Oahu in April of 2014.

DataID: 73 | doi:10.5066/F7WS8RB7 | Date Posted Online: 2016-07-18 | Last Updated: 2019-11-08 12:46:16

We summarize available information on Pacific walrus haulouts from available reports, interviews with coastal residents and aviators, and personal observations of the authors. We provide this in the form of a georeferenced database that may be queried and displayed with standard geographic information system and database management software. The database contains 150 records of Pacific walrus haulouts, with a summary of basic characteristics on maximum haulout size, age-sex composition, season of use, and decade of most recent use. Citations to reports are provided as a bibliographic database.

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Spatial Services

DataID: 74 | doi:10.5066/F7RX994P | Date Posted Online: 2016-07-18 | Last Updated: 2019-07-29 12:41:40

Data set containing avian influenza sampling information for spring and summer waterbirds on the Yukon Kuskokwim Delta, 2015. Data contains sample ID, species common name, age and sex, collection data and location, and laboratory specific data used to identify presence and absence of avian influenza viruses.

DataID: 72 | doi:10.5066/F7SB43V5 | Date Posted Online: 2016-06-22 | Last Updated: 2019-07-29 12:41:40

This data set includes data from five waterfowl species (northern pintail, American wigeon, lesser scaup, green-winged teal and mallard) that were captured in Interior Alaska in 2010, then measured and sampled for blood parasite and avian influenza infections.

DataID: 70 | doi:10.5066/F7QJ7FD2 | Date Posted Online: 2016-06-06 | Last Updated: 2019-07-29 12:41:39

Since the late 1950s, the USGS has maintained a long-term glacier mass-balance program at three North American glaciers. Measurements began on South Cascade Glacier, WA in 1958, expanding to Gulkana and Wolverine glaciers, AK in 1966, and later Sperry Glacier, MT in 2005. The Juneau Icefield Research Program has measured surface mass balance on Lemon Creek and Taku Glacier since the mid-1940s, with USGS providing complimentary seasonal measurements of Lemon Creek beginning in 2014 (JIRP; Pelto and others, 2013). Direct field measurements of point glaciological data are combined with weather and geodetic data to estimate the seasonal and annual mass balance at each glacier in both a conventional and reference surface format (Cogley and others, 2011). The analysis framework (O'Neel and others, 2019; prior to v 3.0 van Beusekom and others, 2010) is identical at each glacier to enable cross-comparison between output time series. Vocabulary used follows Cogley and others (2011) Glossary of Glacier Mass Balance. This portion of the data release includes glacier wide mass balance, as well as the refined inputs used in these calculations. Input data are of three types: 1) time-variable area altitude distribution (AAD); 2) time series of point water balance at long term sites (with secondary sites given in recent years); 3) weather data from nearby stations, either installed along the glacier margins or taken from a nearby site if continuous glacier-adjacent data is unavailable. The USGS runs a coded analysis to transform the three input data types to the output glacier-wide data. Output data represent surface mass balance estimates. The output solution is a geodetically calibrated, conventional glacier-wide mass balance, which represents our preferred solution. Conventional glacier-wide mass balance from direct observations without calibration can be easily derived by using the geodetic calibration coefficients provided, if desired. We do not explicitly account for basal or englacial accumulation or ablation. Mass balances are reported in water equivalent (w.e.) units, and often represent integration of multiple field measurements. Whenever possible, we average multiple field measurements to account for surface roughness and measurement errors. These raw point measurements and other mass-balance related data are included in the larger USGS Benchmark Glacier Project Comprehensive Data Collection, available at https://doi.org/10.5066/P9AGXQSR. Preliminary mass balance estimates for the current calendar year are provided, but do not include direct measurements of ablation after the date of the fall visit. Preliminary estimates of mass balance model this winter ablation for the current year. During subsequent field visits in the following calendar year, any ablation that occurred over the winter season is measured and used to revise the previously modeled estimate of mass balance.

DataID: 79 | doi:10.5066/F7HD7SRF | Date Posted Online: 2016-05-24 | Last Updated: 2024-02-23 09:09:08

This data set describes nuclear microsatellite genotypes derived from eleven autosomal loci (Hg16, Hg18, Hg25, K16, Lar12, Lar19, Lar24, Lar26, Rbg13, Rbg18, and Rbg29). A total of 651 Larus gulls were examined for this study with samples collected throughout North America, Europe, Russia, and South America.

DataID: 68 | doi:10.5066/F74X55WS | Date Posted Online: 2016-05-18 | Last Updated: 2020-11-10 15:41:53

The project utilized data from the Waterfowl Breeding Population and Habitat Survey, which is an annual survey conducted since 1955 by the governments of the United States and Canada to monitor waterfowl populations. These survey data were spatially and temporally layered onto long-term databases of fire perimeters for Alaska and western Canada, providing a record of waterfowl transects which had burned over the last 60 years. The project modelled abundance of dabbler and diver pairs in relation to time since fire, looking at short-term (e.g., 1-3 years) versus long-term timeframes (e.g., >5 years), and in relation to fire extent, defined as the percent of transect which had burned.

DataID: 69 | doi:10.5066/F7RR1WBN | Date Posted Online: 2016-05-18 | Last Updated: 2019-07-29 12:41:39

This dataset contains stable isotope incorporation and discrimination results for several sets of feeding experiments with captive brown and polar bears. Experiments were designed to determine the effects of dietary lipid content and fasting behavior on discrimination in blood, hair, and fat. Data are divided into three components of the study: one to estimate isotopic discrimination with varying dietary lipid content, one to estimate the potential effects of fasting on tissue isotope values, and one to determine incorporation rates of isotopes in various tissues. The experiments were conducted between 2009 and 2013 with captive grizzly bears at Washington State University and captive polar bears at the Oregon and Alaska zoos.

DataID: 67 | doi:10.5066/F79W0CJ3 | Date Posted Online: 2016-04-21 | Last Updated: 2019-07-29 12:41:39

This data set contains genetic information collected from eelgrass (Zostera marina) populations along the Pacific coast of North America from Alaska to Baha California. A total of 447 samples were collected comprising 401 unique individuals (genets) and 46 clones (ramets) from which 10 microsatellite DNA loci were obtained.

DataID: 66 | doi:10.5066/F7GQ6VTK | Date Posted Online: 2016-04-18 | Last Updated: 2019-07-29 12:41:39

This dataset contains nest visit, capture, measurement, and resight data from Spectacled Eiders (Somateria fischeri) near the Kashunuk River and on Kigigak Island on the Yukon-Kuskokwim Delta, Alaska since 1991.

Waterfowl lead exposure data (1993-1999) were previously available in version 1.0 of this data release. All USGS Alaska Science Center waterfowl lead exposure data are now consolidated in a separate USGS data release available at https://doi.org/10.5066/F7B27SDZ

DataID: 65 | doi:10.5066/F74B2ZCK | Date Posted Online: 2016-03-14 | Last Updated: 2023-05-22 14:04:05

This data set describes nuclear microsatellite genotypes derived from twelve autosomal loci (6AB, Aph02, Aph08, Aph19, Aph23, Bca10, Bca11, Hhi5, Sfi11, Smo07, Smo09, and CRG), and two Z-linked microsatellite loci (Bca4 and Smo1). A total of 111 Long-tailed Ducks were examined for this genotyping with samples coming from the two primary breeding locales within Alaska (Arctic Coastal Plain of Alaska and the Yukon Delta, Western Alaska) and a representative locale in the central Canadian Arctic (Queen Maud Gulf Bird Sanctuary, Nunavut, Canada). The sex of most samples was determined in the field by plumage and later confirmed by using the CHD molecular sexing protocol (Griffiths et al., 1998).

DataID: 60 | doi:10.5066/F7HX19RJ | Date Posted Online: 2016-02-01 | Last Updated: 2023-07-07 13:37:04

These data are the results of a modified Delphi survey in which expert opinion was solicited on the occurrence and frequency of recreational activities in brown bear habitats and their potential impacts. Twelve bear experts were surveyed and identified by either 1) their scientific publications on the impacts of one or more human recreational activity on bears, or 2) their experience in managing bear populations impacted by human recreational activities. Respondents were asked to estimate the frequency of each identified recreational activity for the bear populations they have experience with, estimate the proportion of each specific bear population exposed to each activity, and indicate the potential impacts of recreational activities in those bear populations. The frequency of occurrence of a recreational activity category and the proportion of the bear population exposed are reported from the final survey. We report the percentage of experts that noted potential for an impact on reduced survival, decreased nutritional intake, displacement, and reduced reproduction.

DataID: 55 | doi:10.5066/F71V5C1F | Date Posted Online: 2015-10-28 | Last Updated: 2019-07-29 12:41:39

Tracking Data Maps

DataID: 54 | doi:10.5066/F7BZ643N | Date Posted Online: 2015-10-25 | Last Updated: 2019-07-29 12:41:39

Ground Penetrating Radar Data, Eklutna Glacier, Alaska

No data are available from this page.

U.S. Geological Survey ground penetrating radar (GPR) data from select North American glaciers, including the Eklutna Glacier, are available at the USGS Alaska Science Center GPR data page: https://doi.org/10.5066/F7M043G7

DataID: 47 | doi:10.5066/F7F769M4 | Date Posted Online: 2015-08-25 | Last Updated: 2023-03-09 10:10:28

Ground Penetrating Radar Data, Eureka Glacier, Alaska

No data are available from this page.

U.S. Geological Survey ground penetrating radar (GPR) data from select North American glaciers, including the Eureka Glacier, are available at the USGS Alaska Science Center GPR data page: https://doi.org/10.5066/F7M043G7

DataID: 48 | doi:10.5066/F7Z60M35 | Date Posted Online: 2015-08-25 | Last Updated: 2023-03-09 10:10:30

Ground Penetrating Radar Data, Gulkana Glacier, Alaska

No data are available from this page.

U.S. Geological Survey ground penetrating radar (GPR) data from select North American glaciers, including the Gulkana Glacier, are available at the USGS Alaska Science Center GPR data page: https://doi.org/10.5066/F7M043G7

DataID: 49 | doi:10.5066/F7TH8JRR | Date Posted Online: 2015-08-25 | Last Updated: 2023-03-09 10:10:31

Ground Penetrating Radar Data, Scott Glacier, Alaska

No data are available from this page.

U.S. Geological Survey ground penetrating radar (GPR) data from select North American glaciers, including the Scott Glacier, are available at the USGS Alaska Science Center GPR data page: https://doi.org/10.5066/F7M043G7

DataID: 50 | doi:10.5066/F76Q1V81 | Date Posted Online: 2015-08-25 | Last Updated: 2023-03-09 10:10:33

Ground Penetrating Radar Data, Taku Glacier, Alaska

No data are available from this page.

U.S. Geological Survey ground penetrating radar (GPR) data from select North American glaciers, including the Taku Glacier, are available at the USGS Alaska Science Center GPR data page: https://doi.org/10.5066/F7M043G7

DataID: 51 | doi:10.5066/F7BG2M16 | Date Posted Online: 2015-08-25 | Last Updated: 2023-03-09 10:10:34

Ground Penetrating Radar Data, Valdez Glacier, Alaska

No data are available from this page.

U.S. Geological Survey ground penetrating radar (GPR) data from select North American glaciers, including the Valdez Glacier, are available at the USGS Alaska Science Center GPR data page: https://doi.org/10.5066/F7M043G7

DataID: 52 | doi:10.5066/F7K072BV | Date Posted Online: 2015-08-25 | Last Updated: 2023-03-09 10:10:35

Ground Penetrating Radar Data, Wolverine Glacier, Alaska

No data are available from this page.

U.S. Geological Survey ground penetrating radar (GPR) data from select North American glaciers, including the Wolverine Glacier, are available at the USGS Alaska Science Center GPR data page: https://doi.org/10.5066/F7M043G7

DataID: 53 | doi:10.5066/F7G73BRH | Date Posted Online: 2015-08-25 | Last Updated: 2023-03-09 10:10:37

The geographically closed, non-migratory populations of endangered Laysan Teal (Anas laysanensis) were sampled in the wild. This species was once widespread across the Hawaiian archipelago, but became isolated on Laysan Island (415 ha) from the mid-1800s until 2004 when a translocation to Midway Atoll (596 ha) was undertaken to reduce extinction risks. We compared genetic diversity and quantified variation at microsatellite loci sampled from 229 individuals from the wild populations at Laysan Island (1999-2009) and Midway Atoll (2007-2010; n = 133 Laysan, n = 96 Midway birds). We identified polymorphic markers by screening nuclear microsatellites (N = 83). Low nuclear variation was detected, consistent with the species' insular isolation and historical bottleneck. Six of 83 microsatellites were polymorphic.

DataID: 46 | doi:10.5066/F72Z13JP | Date Posted Online: 2015-07-28 | Last Updated: 2023-07-07 12:51:55

This dataset contains fatty acid (FA) data expressed as mass percent of total FA for bearded seals, ringed seals and walrus. This is one of many datasets used in Bromaghin et al., In press, Assessing the robustness of quantitative fatty acid signature analysis to assumption violations, Methods in Ecology and Evolution. These supplemental data were used in computer simulations to compare the bias of several quantitative fatty acid signature analysis (QFASA) estimators and develop recommendations regarding estimator selection.

DataID: 44 | doi:10.5066/F7PR7T2W | Date Posted Online: 2015-07-23 | Last Updated: 2022-11-14 09:40:13

The North Pacific Pelagic Seabird Database (NPPSD) is maintained by the USGS Alaska Science Center and includes survey transect data designed and conducted by numerous partners primarily to census seabirds at sea. The data provided here relate to observations of marine birds and mammals observed during at-sea surveys throughout the North Pacific including the Arctic Ocean, Beaufort Sea, Chukchi Sea, Bering Sea, Sea of Okhotsk, and Barents Sea. This data release contains 5 tables including observation data, survey locations, taxonomic designations of observed birds and mammals, summary information about each dataset added to the database, and a table showing changes made to the database from version 4.0 to 4.1.

DataID: 1 | doi:10.5066/F7WQ01T3 | Date Posted Online: 2015-07-10 | Last Updated: 2023-05-08 13:25:26

These data were collected by the U.S. Geological Survey, Alaska Science Center, Polar Bear Research Program as part of long-term research on the southern Beaufort Sea polar bear population.

DataID: 7 | doi:10.5066/F7VQ30Q5 | Date Posted Online: 2015-03-28 | Last Updated: 2022-11-14 09:40:11

This dataset is comprised of 36 black and white 9x9 inch aerial images of four different study areas on Alaska's Arctic Coastal Plain taken between 1948-1949 and obtained from the Alaska Satellite Facility in 2013. The images represent an historical snapshot of the landscape from that time. The images were scanned and geo-referenced to various contemporary (2002-2010) satellite imagery using tie-point methods and splines for interpolation.

DataID: 2 | doi:10.5066/F79021TB | Date Posted Online: 2015-03-05 | Last Updated: 2022-09-30 12:19:29

This dataset is comprised of a single aerial image of a single area on Alaska's Arctic Coastal Plain taken on 21 June 1955 by the U.S. Air Force and obtained from the USGS EROS data center via the EarthExplorer website in 2013. The image represents an historical snapshot of the landscape from that time. The image was scanned and geo-referenced to various contemporary (2002-2010) satellite imagery using tie-point methods and splines for interpolation.

DataID: 3 | doi:10.5066/F757192K | Date Posted Online: 2015-03-05 | Last Updated: 2022-09-30 12:12:47

This dataset is comprised of 10 aerial images of three different study areas on Alaska's Arctic Coastal Plain flown by NASA in 1974, 1977, 1979 and obtained from the USGS EROS Data Center via the EarthExplorer website in 2013. The images represent an historical snapshot of the landscape from that time. The images were scanned and georeferenced to various contemporary (2002-2010) satellite imagery using tie-point methods and splines for interpolation.

DataID: 4 | doi:10.5066/F71G0J9D | Date Posted Online: 2015-03-05 | Last Updated: 2019-07-29 12:41:38

This data package contains two tables with habitat measurements from each sampling point used in avian point-transect surveys on the Seward Peninsula in 2012 and the locations of those sites. Measurements include percent cover and canopy height of alder (Alnus spp.), dwarf birch (Betula spp.), ericaceous shrubs (e.g., Empetrum, Vaccinium spp.), herbaceous, lichen (e.g., Cladonia spp.), and willow (Salix spp.).

DataID: 5 | doi:10.5066/F7F18WS3 | Date Posted Online: 2015-01-30 | Last Updated: 2023-02-15 08:57:43

This data package contains three tables: 1) avian point-transect survey data collected on the Seward Peninsula in 2012, 2) locations of all survey sites, and 3) an avian taxonomy table for reference.

DataID: 6 | doi:10.5066/F7JS9NG2 | Date Posted Online: 2015-01-30 | Last Updated: 2023-02-15 08:57:47

Author(s): Marcot, B. G.; Jorgenson, M. T.; DeGange, A. R.

DataID: 556 | doi:10.5066/P9KFIRWQ | Date Posted Online: 2014-09-19 | Last Updated: 2023-03-17 16:29:46

The dataset consists of geospatial files depicting the estimated June-to-November distribution of walrus foraging and occupancy during a four year period of sparse sea ice cover above the Chukchi Sea continental shelf (2008-2011). The walrus distribution and utilization estimates are based on location data from satellite-linked radio-tracked walruses in the Chukchi Sea (2008-2011). Compared to previous years this period was marked by earlier and more extensive sea ice retreat (June - September) and delayed sea ice freeze-up (October - November). This allowed walruses to arrive earlier, occupy slightly more northern areas, and stay later in the Chukchi Sea than previously. Data are combined for all four years and structured by month (June [06] - November [11]). Within each month, we estimated walrus utilization distributions by using an unweighted movement based kernel density estimator. The kernel density was then weighted by the amount of time walruses spent foraging during each recorded track segment. We present contours of the kernel density ranging from the 10th to 95th percentile.

DataID: 541 | doi:10.5066/F7X928C3 | Date Posted Online: 2012-11-08 | Last Updated: 2023-01-03 10:41:10

This data reports on the approximate locations and methods of discovery of 530 polar bear (Ursus maritimus) maternal dens observed in the Beaufort and Chukchi seas and neighboring areas between 1910 and 2018, and archived partly by the U.S. Geological Survey, Alaska Science Center, and partly by the U.S. Fish and Wildlife Service, Marine Mammals Management, in Anchorage, Alaska. Data fields include a unique and permanent USGS identifier for each record, the year when the adult would have been expected to depart the den with young, an index of whether the maternal den was confirmed or probable, coordinates of the den, substrate that each den occurred on, the agency source of each record, method of discovery of each den, method used to determine the position of each den, and estimated position uncertainty. Data were collected through standardized VHF aircraft surveys and satellite radio telemetry, field research activities in polar bear habitat, and anecdotal reports from other government agencies, coastal residents, and industry personnel. The polar bear maternal den records presented here supersede an earlier version of these data (Durner and others, 2010).

DataID: 269 | doi:10.5066/P9RPHH50 | Date Posted Online: 2010-01-27 | Last Updated: 2020-01-27 16:01:11

The Alaska Resource Data File (ARDF) is a database of mines, prospects, and mineral occurrences in Alaska. It contains information compiled from published and unpublished sources from industry, U.S. Bureau of Mines (BOM), U.S. Geological Survey (USGS), and other government and private sources. ARDF is not a mining claims database.

DataID: 430 | doi:10.5066/P96MMRFD | Date Posted Online: 1996-06-01 | Last Updated: 2024-02-26 16:01:10