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Karyn D. Rode

Title: Research Wildlife Biologist
Address: 4210 University Dr., Anchorage, AK 99508-4626
Phone: (907) 342-5790
Fax: (907) 786-7150

Image of Karyn D. Rode

Education and/or Training

Ph.D.Washington State UniversityZoology
M.S.Washington State UniversityZoology
B.S.Colorado State UniversityWildlife Biology

Areas of Specialization and/or Research Interests

Nutritional and physiological ecology of large mammals, anthropogenic effects on large mammals, population ecology of ursids

Professional Experience

Mar 2012 - PresentResearch Wildlife Biologist, Alaska Science Center, US Geological Survey
Oct 2006 - Feb 2012Wildlife Biologist, US Fish and Wildlife Service Polar Bear Program, Anchorage, Alaska
Jan 2006 - Oct 2006Research Associate, Cornell University, Forest Elephant program
June 2002 - Dec 2005Contract wildlife biologist - Alaska Department of Fish and Game/PhD candidate - Washington State University

Professional Activities and/or Memberships

Member of the Scientific working group under the US-Russia polar bear commission
Member of the International Union for the Conservation of Nature's (IUCN) Polar bear specialist group
Secretary/Treasurer of the Alaska chapter of the Wildlife Society 2009-2010

Honors and/or Awards

2011 FWS Exceptional performance award
2010 Department of Interior STAR award
2009 FWS Exceptional performance award
2007 Dept of Interior STAR award

Websites of Interest


Total pubs: 52

Rode, K. D., R. R. Wilson, D. C. Douglas, V. L. Muhlenbruch, T. C. Atwood, E. V. Regehr, E. S. Richardson, N. W. Pilfold, A. E. Derocher, G. M. Durner, I. Stirling, S. C. Amstrup, M. St. Martin, A. M. Pagano, and K. S. Simac. 2018. Spring fasting behavior in a marine apex predator provides an index of ecosystem productivity. Global Change Biology 24(1):410-423. doi:10.1111/gcb.13933 [Details] [Full Publication]

Rode, K. D., J. W. Olson, D. L. Eggett, D. C. Douglas, G. M. Durner, T. C. Atwood, E. V. Regehr, R. R. Wilson, T. S. Smith, and M. St. Martin. 2018. Den phenology and reproductive success of polar bears in a changing climate. Journal of Mammalogy 99(1):16-26. doi:10.1093/jmammal/gyx181 [Details] [Full Publication]

Pagano, A. M., G. M. Durner, K. D. Rode, T. C. Atwood, S. N. Atkinson, E. Peacock, D. P. Costa, M. A. Owen, and T. M. Williams. 2018. High-energy, high-fat lifestyle challenges an Arctic apex predator, the polar bear. Science 359(6375):568-572. doi:10.1126/science.aan8677 [Details] [Full Publication]

Ware, J. V., K. D. Rode, J. F. Bromaghin, D. C. Douglas, R. R. Wilson, E. V. Regehr, S. C. Amstrup, G. M. Durner, A. M. Pagano, J. W. Olson, C. T. Robbins, and H. T. Jansen. 2017. Habitat degradation affects the summer activity of polar bears. Oecologia 184(1):87-89. doi:10.1007/s00442-017-3839-y [Details] [Full Publication]

Regehr, E. V., R. R. Wilson, K. D. Rode, M. C. Runge, and H. Stern. 2017. Harvesting wildlife affected by climate change: a modelling and management approach for polar bears. Journal of Applied Ecology 54(5). doi:10.1111/1365-2664.12864 [Details] [Full Publication]

Olson, J. W., K. D. Rode, D. L. Eggett, T. S. Smith, R. R. Wilson, G. M. Durner, A. S. Fischbach, T. C. Atwood, and D. C. Douglas. 2017. Collar temperature sensor data reveal long-term patterns in southern Beaufort Sea polar bear den distribution on pack ice and land. Marine Ecology Progress Series 564:211-224. doi:10.3354/meps12000 [Details] [Full Publication] [Pub Brief]

Pagano, A. M., K. D. Rode, A. Cutting, M. A. Owen, S. Jensen, J. V. Ware, C. M. Robbins, G. M. Durner, T. C. Atwood, M. E. Obbard, K. R. Middel, G. W. Thiemann, and T. M. Williams. 2017. Using tri-axial accelerometers to identify wild polar bear behaviors. Endangered Species Research 32:19-33. doi:10.3354/esr00779 [Details] [Full Publication]

Bromaghin, J. F., S. M. Budge, G. W. Thiemann, and K. D. Rode. 2017. Simultaneous estimation of diet compositions and calibration coefficients using fatty acid data. Ecology and Evolution 7(16):6103-6113. doi:10.1002/ece3.3179 [Details] [Full Publication]

Pagano, A. M., K. D. Rode, and S. N. Atkinson. 2017. Evaluating methods to assess the body condition of female polar bears. Ursus 28(2):171-181. doi:10.2192/URSU-D-16-00029.1 [Details] [Full Publication]

Bromaghin, J. F., S. M. Budge, G. W. Thiemann, and K. D. Rode. 2016. Assessing the robustness of quantitative fatty acid signature analysis to assumption violations. Methods in Ecology and Evolution 7(1):51-59. doi:10.1111/2041-210X.12456 [Details] [Full Publication]

Rode, K. D., C. A. Stricker, C. Erlenbach, C. T. Robbins, S. G. Cherry, S. D. Newsome, A. Cutting, S. Jensen, G. Stenhouse, M. Brooks, A. Hash, and N. Nicassio. 2016. Isotopic incorporation and the effects of fasting and dietary lipid content on isotopic discrimination in large, carnivorous mammals. Physiological and Biochemical Zoology. doi:10.1086/686490 [Details] [Full Publication]

Atwood, T. C., B. G. Marcot, D. C. Douglas, S. C. Amstrup, K. D. Rode, G. M. Durner, and J. F. Bromaghin. 2016. Forecasting the relative influence of environmental and anthropogenic stressors on polar bears. Ecosphere 7(6):e01370. doi:10.1002/ecs2.1370 [Details] [Full Publication]

Wilson, R. R., E. V. Regehr, K. D. Rode, and M. St. Martin. 2016. Invariant polar bear habitat selection during a period of sea ice loss. Proceedings of the Royal Society B 283(1836):20160380. doi:10.1098/rspb.2016.0380 [Details] [Full Publication]

Atwood, T. C., B. G. Marcot, D. C. Douglas, S. C. Amstrup, K. D. Rode, G. M. Durner, and J. F. Bromaghin. 2015. Evaluating and ranking threats to the long-term persistence of polar bears. USGS Open-File Report 2014-1254, 114 p. doi:10.3133/ofr20141254 [Details] [Full Publication]

Regehr, E. V., R. R. Wilson, K. D. Rode, and M. C. Runge. 2015. Resilience and risk—A demographic model to inform conservation planning for polar bears. USGS Open-File Report 2015-1029, 56 p. doi:10.3133/ofr20151029 [Details] [Full Publication]

Bromaghin, J. F., K. D. Rode, S. M. Budge, and G. W. Thiemann. 2015. Distance measures and optimization spaces in quantitative fatty acid signature analysis. Ecology and Evolution 5(6):1249-1262. doi:10.1002/ece3.1429 [Details] [Full Publication]

Rode, K. D., C. T. Robbins, L. Nelson, and S. C. Amstrup. 2015. Can polar bears use terrestrial foods to offset lost ice-based hunting opportunities?. Frontiers in Ecology and the Environment 13:138-145. doi:10.1890/140202 [Details] [Full Publication]

Bowen, L., A. K. Miles, S. Waters, R. Meyerson, K. D. Rode, and T. C. Atwood. 2015. Gene transcription in polar bears (Ursus maritimus) from disparate populations. Polar Biology 38(9):1413-1427. doi:10.1007/s00300-015-1705-0 [Details] [Full Publication]

Oakley, K. L., T. C. Atwood, D. C. Douglas, K. D. Rode, and M. E. Whalen. 2015. Changing Arctic Ecosystems - Updated forecast: Reducing carbon dioxide (CO2) emissions required to improve polar bear outlook. USGS Fact Sheet 2015-3042, 2 p. doi:10.3133/fs20153042 [Details] [Full Publication]

Ware, J. V., K. D. Rode, A. M. Pagano, J. F. Bromaghin, C. T. Robbins, J. A. Erlenbach, and H. T. Jansen. 2015. Validation of mercury tip-switch and accelerometer activity sensors for identifying resting and active behavior in bears. Ursus 26(2):86-96. doi:10.2192/URSUS-D-14-00031.1 [Details] [Full Publication]

Fortin, J. K., K. D. Rode, G. V. Hilderbrand, J. Wilder, S. D. Farley, C. L. Jorgensen, and B. G. Marcot. 2015. Impacts of human recreation on brown bears (Ursus arctos): a review and new management tool. PLoS One 110(1): e0141983. doi:10.1371/journal.pone.0141983 [Details] [Full Publication]

Rode, K. D., R. R. Wilson, E. V. Regehr, M. St. Martin, D. C. Douglas, and J. W. Olson. 2015. Increased land use by Chukchi Sea polar bears in relation to changing sea ice conditions. PLoS One 10(11):e0142213. doi:10.1371/journal.pone.0142213 [Details] [Full Publication] [Pub Brief]

Rode, K. D., E. V. Regehr, D. C. Douglas, G. M. Durner, A. E. Derocher, G. W. Thiemann, and S. M. Budge. 2014. Variation in the response of an Arctic top predator experiencing habitat loss: feeding and reproductive ecology of two polar bear populations. Global Change Biology 20(1):76-88. doi:10.1111/gcb.12339 [Details] [Full Publication]

Welch, A. J., O. C. Bedoya-Reina, L. Carretro-Paulet, W. Miller, K. D. Rode, and C. Lindqvist. 2014. Polar bears exhibit genome-wide signatures of bioenergetic adaptation to life in the Arctic environment. Genome Biology and Evolution 6(2):433-450. doi:10.1093/gbe/evu025 [Details] [Full Publication]

Erlenbach, J. A., K. D. Rode, D. Raubenheimer, and C. M. Robbins. 2014. Macronutrient optimization and energy maximization determine diets of brown bears. Journal of Mammalogy 95(1):160-168. doi:10.1644/13-MAMM-A-161 [Details] [Full Publication]

Voorhees, H., R. Sparks, H. P. Huntington, and K. D. Rode. 2014. Traditional knowledge of polar bears (Ursus maritimus) in Northwestern Alaska. Arctic 67(4). doi:10.14430/arctic4425 [Details] [Full Publication]

Rode, K. D., A. M. Pagano, J. F. Bromaghin, T. C. Atwood, G. M. Durner, K. S. Simac, and S. C. Amstrup. 2014. Effects of capturing and collaring on polar bears: Findings from long-term research on the southern Beaufort population. Wildlife Research 41(4):311-322. doi:10.1071/WR13225 [Details] [Full Publication]

Wilson, R. R., J. S. Horne, K. D. Rode, E. V. Regehr, and G. M. Durner. 2014. Identifying polar bear resource selection patterns to inform offshore development in a dynamic and changing Arctic. Ecosphere 5(10):136. doi:10.1890/ES14-00193.1 [Details] [Full Publication]

Miller, W., S. C. Schuster, A. J. Welch, A. Ratan, O. C. Bedoya-Reina, F. Zhao, H. L. Kim, R. C. Burhans, D. I. Drautz, N. E. Wittenkindt, L. P. Tomsho, E. Ibarra-Laclette, L. Herrera-Estrella, E. Peacock, S. D. Farley, G. K. Sage, K. D. Rode, M. E. Obbard, R. Montiel, L. Bachmann, Ó. Ingólfsson, J. Aars, T. Mailund, Ø. Wiig, S. L. Talbot, and C. Lindqvist. 2012. Polar and brown bear genomes reveal ancient admixture and demographic footprints of past climate change. Proceedings of the National Academy of Sciences of USA 109:14295-14296. doi:10.1073/pnas.1210506109 [Details] [Full Publication]

Robbins, C. T., C. Lopez-Alfaro, K. D. Rode, Ø. Tøien, and O. L. Nelson. 2012. Hibernation and seasonal fasting in bears: the energetic costs and consequences for polar bears. Journal of Mammalogy 93(6):1493-1503. doi:10.1644/11-MAMM-A-406.1 [Details] [Full Publication]

Whiteman, J. P., K. A. Greller, H. J. Harlow, L. A. Felicetti, K. D. Rode, and M. Ben-David. 2012. Carbon isotopes in exhaled breath track metabolic substrates in brown bears (Ursus arctos). Journal of Mammalogy 93:413-421. doi:10.1644/11-MAMM-S-178.1 [Details] [Full Publication]

Rode, K. D., E. Peacock, M. Taylor, I. Stirling, E. W. Born, and K. L. Laidre. 2012. A tale of two polar bear populations: climate change, harvest, and body condition. Population Ecology 54(1):3-18. doi:10.1007/s10144-011-0299-9 [Details] [Full Publication]

Rode, K. D., J. D. Reist, E. Peacock, and I. Stirling. 2010. Comments in response to "Estimating the energetic contribution of polar bear (Ursus maritimus) summer diets to the total energy budget" by Dyck and Kebreab (2009). Journal of Mammalogy 91:1517-1523. doi:10.1644/09-MAMM-A-399.1 [Details] [Full Publication]

Rode, K. D., S. C. Amstrup, and E. V. Regehr. 2010. Reduced body size and cub recruitment in polar bears associated with sea ice decline. Ecological Applications 20(3):768-782. doi:10.1890/08-1036.1 [Details] [Full Publication]

Gleason, J. S. and K. D. Rode. 2009. Polar bear distribution and habitat association reflect long-term changes in fall sea ice conditions in the Alaskan Beaufort Sea. Arctic 62(4):405-417. [Details] [Full Publication]

Schliebe, S. L., K. D. Rode, J. S. Gleason, J. Wilder, K. M. Proffitt, T. J. Evans, and S. Miller. 2008. Effects of sea ice extent and food availability on spatial and temporal distribution of polar bears during the fall open-water period in the Southern Beaufort Sea. Polar Biology 31(8):999-1010. doi:10.1007/s00300-008-0439-7 [Details] [Full Publication]

Stirling, I., A. E. Derocher, W. Gough, and K. D. Rode. 2008. Response to Dyck et al. (2007) on polar bears and climate change in western Hudson Bay. Ecological Complexity 5(3):193-201. doi:10.1016/j.ecocom.2008.01.004 [Details] [Full Publication]

Rode, K. D., S. C. Amstrup, and E. V. Regehr. 2007. Polar bears in the southern Beaufort Sea III: Stature, mass, and cub recruitment in relationship to time and sea ice extent between 1982 and 2006. USGS Administrative Report, 31 p. [Details]

Robbins, C. T., J. K. Fortin, K. D. Rode, S. D. Farley, L. A. Shipley, and L. A. Felicetti. 2007. Optimizing protein intake as a foraging strategy to maximize mass gain in an omnivore. Oikos 116(10):1675-1682. doi:10.1111/j.0030-1299.2007.16140.x [Details] [Full Publication]

Fortin, J. K., S. D. Farley, C. T. Robbins, and K. D. Rode. 2007. The role of salmon and berries in determining fall weight gains in brown bears. Ursus 18(1):19-29. doi:10.2192/1537-6176(2007)18[19:DASOBS]2.0.CO;2 [Details] [Full Publication]

Rode, K. D., S. D. Farley, C. T. Robbins, and J. K. Fortin. 2007. Nutritional consequences of experimentally introduced tourism in brown bears. Journal of Wildlife Management 71(3):929-939. doi:10.2193/2006-075 [Details] [Full Publication]

Fortin, J. K., S. D. Farley, K. D. Rode, and C. T. Robbins. 2007. Dietary and spatial overlap between sympatric ursids relative to salmon use. Ursus 18:19-29. [Details]

Danish, L., C. A. Chapman, C. O'Driscoll Worman, K. D. Rode, and M. B. Hall. 2006. The role of sugar content in diet selection in redtail and red colobus monkeys. In Feeding Ecology in apes and other primates. Cambridge University Press, UK. [Details]

Rode, K. D., S. D. Farley, and C. T. Robbins. 2006. Behavioral responses of brown bears mediate nutritional impacts of experimentally introduced tourism. Biological Conservation 133(1):70-80. doi:10.1016/j.biocon.2006.05.021 [Details] [Full Publication]

Rode, K. D., C. A. Chapman, L. D. McDowell, and C. A. Stricker. 2006. Nutritional mechanisms of population regulation across habitats and logging intensities in redtail monkeys (Cercopithecus ascanius). Biotropica 38:625-634. doi:10.1111/j.1744-7429.2006.00183.x [Details] [Full Publication]

Rode, K. D., P. I. Chiyo, C. A. Chapman, and L. D. McDowell. 2006. Nutritional ecology of elephants in Kibale National Park, Uganda, and its relationship with crop raiding behaviour. Journal of Tropical Ecology 22(4):441-449. doi:10.1017/S0266467406003233 [Details] [Full Publication]

Rode, K. D., S. D. Farley, and C. T. Robbins. 2006. Sexual dimorphism, reproductive strategy, and human activities determine resource use by brown bears. Ecology 87(10):2636-2646. doi:10.1890/0012-9658(2006)87[2636:SDRSAH]2.0.CO;2 [Details] [Full Publication]

Chapman, C. A., L. J. Chapman, K. D. Rode, and L. D. McDowell. 2003. Variation in the nutritional value of primate foods: Among trees, time periods, and areas. International Journal of Primatology 24(2):317-337. doi:10.1023/A:1023049200150 [Details] [Full Publication]

Rode, K. D., C. A. Chapman, L. J. Chapman, and L. D. McDowell. 2003. Mineral resource availability and consumption by colobus monkeys in Kibale National Park, Uganda. International Journal of Primatology 24(3):541-573. doi:10.1023/A:1023788330155 [Details] [Full Publication]

Chapman, C. A., L. J. Chapman, M. Cords, M. Gauthua, A. Gautier-Hion, J. E. Lambert, K. D. Rode, C. E. G. Tutin, and L. J. T. White. 2002. Variation in the Diets of Cercopithecus Species: Differences Within Forests, Among Forests, and Across Species. In The Guenons: Diversity and Adaptation in African Monkeys. M. Glenn and M. Cords (eds.). Plenum Press, New York City, NY, USA. [Details]

Rode, K. D., C. T. Robbins, and L. A. Shipley. 2001. The constraints on herbivory by bears. Oecologia 128(1):62-71. doi:10.1007/s004420100637 [Details] [Full Publication]

Rode, K. D. and C. T. Robbins. 2000. Why bears consume mixed diets during fruit abundance. Canadian Journal of Zoology 78(9):1-6. doi:10.1139/z00-082 [Details] [Full Publication]

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