The Research Vessel Norseman II is used to conduct walrus research. USGS and the U.S. Fish and Wildlife Service will observe walruses from June 5 to July 2, 2023, as part of a project to study Pacific walrus population dynamics.
Sarah A Sonsthagen, PhD
Assistant Unit Leader - Nebraska Cooperative Fish and Wildlife Research Unit
Sarah joined the Nebraska Cooperative Unit in 2020 from the U.S. Geological Survey Alaska Science Center where she studied the evolutionary relationships among Arctic vertebrate populations. Her research focuses on investigating ecological drivers of connectivity and adaptive capacity of species of conservation concern using both field- and laboratory-based methods. Movement underlies many key processes in ecology and evolution and is critical for species response to environmental change, as such, she applies population and community driven approaches to evaluate genomic and demographic connectivity across the landscape, adaptive capacity, and the influence of species biology in shaping spatial and temporal genomic diversity to inform management decisions. Sarah has taught Population genetics, Application of genomics in conservation, and Ornithology.
Sarah was a post-doctoral fellow at the Smithsonian Institution, National Museum of Natural History and National Zoo, awarded her Ph.D. in Biological Sciences from University of Alaska Fairbanks, M.S. in Zoology from Brigham Young University, and B.S. in Biology from University of Wisconsin-Stevens Point.
Professional Experience
2013 - 2021 Research Geneticist, USGS Alaska Science Center
2015 - Present Research Associate, University of Wisconsin Stevens Point
2014 - Present Affiliate Faculty, Utah State University
2009 - Present Affiliate Faculty, University of Alaska Anchorage
2009 - 2013 Geneticist, USGS Alaska Science Center
Education and Certifications
Ph.D. 2006 University of Alaska Fairbanks, Fairbanks, AK
M.S. 2002 Brigham Young University, Provo, UT
B.S. 2000 University of Wisconsin Stevens Point, Stevens Point, WI
Affiliations and Memberships*
Sea Duck Joint Venture Continental Technical Team Member
Wilson Ornithological Society Research Grants Review Committee Member
Science and Products
Brant (Branta bernicla) Genetic Data from North America, Europe, and Asia
Peregrine Falcon (Falco peregrinus) mtDNA and Microsatellite Genetic Data, Alaska, Canada and Russia, 1880-2012
Genetic Data from Cooper's Hawks (Accipiter cooperii), North America
Genomic Data from Ptarmigan and Grouse, Alaska
Genetic Data from Wolverine (Gulo gulo) of North America
Genomic Data of North American Sea Ducks
Rusty Blackbird (Euphagus carolinus) Genetic Data, North America
Genetic Data from Barrow's Goldeneye and Common Goldeneye
Genetic Data for Merlin (Falco columbarius) and Cross-Species Microsatellite Amplification in Select Falco Species, North America
Genetic Data from Three Accipiter Species, North America, 1996-2014
Shrew (Sorex sp.) Gut Contents Identified by DNA Metabarcoding, North America, 1968-2016
Metabarcoding of Feces of Pacific Walruses and Autosomal DNA Sequence Data of Marine Invertebrates, 2012-2015, Alaska
The Research Vessel Norseman II is used to conduct walrus research. USGS and the U.S. Fish and Wildlife Service will observe walruses from June 5 to July 2, 2023, as part of a project to study Pacific walrus population dynamics.
Walruses in the Chukchi Sea during a tagging survey onboard the Norseman II in June 2010.
Walruses in the Chukchi Sea during a tagging survey onboard the Norseman II in June 2010.
Walruses in the Chukchi Sea during a tagging survey onboard the Norseman II in June 2010.
Walruses in the Chukchi Sea during a tagging survey onboard the Norseman II in June 2010.
Walruses in the Chukchi Sea during a tagging survey onboard the Norseman II in June 2010.
Walruses in the Chukchi Sea during a tagging survey onboard the Norseman II in June 2010.
Walruses in the Chukchi Sea during a tagging survey onboard the Norseman II in June 2010.
Walruses in the Chukchi Sea during a tagging survey onboard the Norseman II in June 2010.
Walruses in the Chukchi Sea during a tagging survey onboard the Norseman II in June 2010.
Walruses in the Chukchi Sea during a tagging survey onboard the Norseman II in June 2010.
Where east meets west: Phylogeography of the high Arctic North American brant goose
Movement and genomic methods reveal mechanisms promoting connectivity in a declining shorebird: The lesser yellowlegs
Ancient bears provide insights into Pleistocene ice age refugia in Southeast Alaska
Diversity, distribution, and methodological considerations of haemosporidian infections among Galliformes in Alaska
Fecal DNA metabarcoding shows credible short-term prey detections and explains variation in the gut microbiome of two polar bear subpopulations
As the goose flies: Migration routes and timing influence patterns of genetic diversity in a circumpolar migratory herbivore
Low levels of hybridization between sympatric cold-water-adapted Arctic cod and Polar cod in the Beaufort Sea confirm genetic distinctiveness
Gull plumages are, and are not, what they appear to human vision
The DDT-induced decline influenced genetic diversity in naturally-recovered peregrine falcons (Falco peregrinus) nesting within the Alaska Arctic and eastern Interior
Detection of Splendidofilaria sp. (Onchocercidae:Splendidofilariinae) Microfilaria within Alaskan ground-dwelling birds in the grouse subfamily tetraoninae using taqman probe-based real-time PCR
Species-specific responses to landscape features shaped genomic structure within Alaska galliformes
Dynamic landscapes in northwestern North America structured populations of wolverines (Gulo gulo)
Non-USGS Publications**
**Disclaimer: The views expressed in Non-USGS publications are those of the author and do not represent the views of the USGS, Department of the Interior, or the U.S. Government.
Science and Products
Brant (Branta bernicla) Genetic Data from North America, Europe, and Asia
Peregrine Falcon (Falco peregrinus) mtDNA and Microsatellite Genetic Data, Alaska, Canada and Russia, 1880-2012
Genetic Data from Cooper's Hawks (Accipiter cooperii), North America
Genomic Data from Ptarmigan and Grouse, Alaska
Genetic Data from Wolverine (Gulo gulo) of North America
Genomic Data of North American Sea Ducks
Rusty Blackbird (Euphagus carolinus) Genetic Data, North America
Genetic Data from Barrow's Goldeneye and Common Goldeneye
Genetic Data for Merlin (Falco columbarius) and Cross-Species Microsatellite Amplification in Select Falco Species, North America
Genetic Data from Three Accipiter Species, North America, 1996-2014
Shrew (Sorex sp.) Gut Contents Identified by DNA Metabarcoding, North America, 1968-2016
Metabarcoding of Feces of Pacific Walruses and Autosomal DNA Sequence Data of Marine Invertebrates, 2012-2015, Alaska
The Research Vessel Norseman II is used to conduct walrus research. USGS and the U.S. Fish and Wildlife Service will observe walruses from June 5 to July 2, 2023, as part of a project to study Pacific walrus population dynamics.
The Research Vessel Norseman II is used to conduct walrus research. USGS and the U.S. Fish and Wildlife Service will observe walruses from June 5 to July 2, 2023, as part of a project to study Pacific walrus population dynamics.
Walruses in the Chukchi Sea during a tagging survey onboard the Norseman II in June 2010.
Walruses in the Chukchi Sea during a tagging survey onboard the Norseman II in June 2010.
Walruses in the Chukchi Sea during a tagging survey onboard the Norseman II in June 2010.
Walruses in the Chukchi Sea during a tagging survey onboard the Norseman II in June 2010.
Walruses in the Chukchi Sea during a tagging survey onboard the Norseman II in June 2010.
Walruses in the Chukchi Sea during a tagging survey onboard the Norseman II in June 2010.
Walruses in the Chukchi Sea during a tagging survey onboard the Norseman II in June 2010.
Walruses in the Chukchi Sea during a tagging survey onboard the Norseman II in June 2010.
Walruses in the Chukchi Sea during a tagging survey onboard the Norseman II in June 2010.
Walruses in the Chukchi Sea during a tagging survey onboard the Norseman II in June 2010.
Where east meets west: Phylogeography of the high Arctic North American brant goose
Movement and genomic methods reveal mechanisms promoting connectivity in a declining shorebird: The lesser yellowlegs
Ancient bears provide insights into Pleistocene ice age refugia in Southeast Alaska
Diversity, distribution, and methodological considerations of haemosporidian infections among Galliformes in Alaska
Fecal DNA metabarcoding shows credible short-term prey detections and explains variation in the gut microbiome of two polar bear subpopulations
As the goose flies: Migration routes and timing influence patterns of genetic diversity in a circumpolar migratory herbivore
Low levels of hybridization between sympatric cold-water-adapted Arctic cod and Polar cod in the Beaufort Sea confirm genetic distinctiveness
Gull plumages are, and are not, what they appear to human vision
The DDT-induced decline influenced genetic diversity in naturally-recovered peregrine falcons (Falco peregrinus) nesting within the Alaska Arctic and eastern Interior
Detection of Splendidofilaria sp. (Onchocercidae:Splendidofilariinae) Microfilaria within Alaskan ground-dwelling birds in the grouse subfamily tetraoninae using taqman probe-based real-time PCR
Species-specific responses to landscape features shaped genomic structure within Alaska galliformes
Dynamic landscapes in northwestern North America structured populations of wolverines (Gulo gulo)
Non-USGS Publications**
**Disclaimer: The views expressed in Non-USGS publications are those of the author and do not represent the views of the USGS, Department of the Interior, or the U.S. Government.
*Disclaimer: Listing outside positions with professional scientific organizations on this Staff Profile are for informational purposes only and do not constitute an endorsement of those professional scientific organizations or their activities by the USGS, Department of the Interior, or U.S. Government