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
2009 - Present, Affiliate Faculty, University
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
Genomic Data from Gray-headed Chickadee and Boreal Chickadee Genomic Data from Gray-headed Chickadee and Boreal Chickadee
Macoma Clam Prey Identified by DNA Metabarcoding, 2018 and 2019, Alaska Macoma Clam Prey Identified by DNA Metabarcoding, 2018 and 2019, Alaska
Brant (Branta bernicla) Genetic Data from North America, Europe, and Asia 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 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 Genetic Data from Cooper's Hawks (Accipiter cooperii), North America
Genomic Data from Ptarmigan and Grouse, Alaska Genomic Data from Ptarmigan and Grouse, Alaska
Genetic Data from Wolverine (Gulo gulo) of North America Genetic Data from Wolverine (Gulo gulo) of North America
Genomic Data of North American Sea Ducks Genomic Data of North American Sea Ducks
Rusty Blackbird (Euphagus carolinus) Genetic Data, North America Rusty Blackbird (Euphagus carolinus) Genetic Data, North America
Genetic Data from Barrow's Goldeneye and Common Goldeneye 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 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 Genetic Data from Three Accipiter Species, North America, 1996-2014
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.
Walrus Female And Calf On An Ice Floe, Next To Another Walrus
Walrus Female And Calf On An Ice Floe, Next To Another WalrusWalruses in the Chukchi Sea during a tagging survey onboard the Norseman II in June 2010.
Walrus Female And Calf On An Ice Floe, Next To Another Walrus
Walrus Female And Calf On An Ice Floe, Next To Another WalrusWalruses 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.
Too hot for comfort: Elevated temperatures influence gene expression and exceed thermal tolerance of bigmouth shiners, Ericymba dorsalis Too hot for comfort: Elevated temperatures influence gene expression and exceed thermal tolerance of bigmouth shiners, Ericymba dorsalis
Hybridization and asymmetrical introgression between the vulnerable Gray‐Headed Chickadee and a more abundant congener, the Boreal Chickadee: Implications for conservation Hybridization and asymmetrical introgression between the vulnerable Gray‐Headed Chickadee and a more abundant congener, the Boreal Chickadee: Implications for conservation
Adoption of non‐related goslings and intergenerational family cohesion among Greenland White‐fronted Geese (Anser albifrons flavirostris) Adoption of non‐related goslings and intergenerational family cohesion among Greenland White‐fronted Geese (Anser albifrons flavirostris)
Prevalence of pelagic diatoms and harmful algae in tellinid bivalve diets during record low sea ice in the Pacific Arctic determined by DNA metabarcoding Prevalence of pelagic diatoms and harmful algae in tellinid bivalve diets during record low sea ice in the Pacific Arctic determined by DNA metabarcoding
The complete genome sequence of Splendidofilaria pectoralis (Onchocercidae, Rhabditida, Chromadorea, Nematoda) The complete genome sequence of Splendidofilaria pectoralis (Onchocercidae, Rhabditida, Chromadorea, Nematoda)
Wintering grounds leave their mark: Where birds winter influences genomic structure in Arctic nesting common eiders Wintering grounds leave their mark: Where birds winter influences genomic structure in Arctic nesting common eiders
26 August 2024 Reduced representation sequencing reveals weak genetic differentiation between Canadian and European Larus hyperboreus (Glaucous Gull) 26 August 2024 Reduced representation sequencing reveals weak genetic differentiation between Canadian and European Larus hyperboreus (Glaucous Gull)
Combined high rates of alternative breeding strategies unexpectedly found among populations of a solitary nesting raptor Combined high rates of alternative breeding strategies unexpectedly found among populations of a solitary nesting raptor
Where east meets west: Phylogeography of the high Arctic North American brant goose 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 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 Ancient bears provide insights into Pleistocene ice age refugia in Southeast Alaska
Diversity, distribution, and methodological considerations of haemosporidian infections among Galliformes in Alaska Diversity, distribution, and methodological considerations of haemosporidian infections among Galliformes in Alaska
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
Genomic Data from Gray-headed Chickadee and Boreal Chickadee Genomic Data from Gray-headed Chickadee and Boreal Chickadee
Macoma Clam Prey Identified by DNA Metabarcoding, 2018 and 2019, Alaska Macoma Clam Prey Identified by DNA Metabarcoding, 2018 and 2019, Alaska
Brant (Branta bernicla) Genetic Data from North America, Europe, and Asia 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 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 Genetic Data from Cooper's Hawks (Accipiter cooperii), North America
Genomic Data from Ptarmigan and Grouse, Alaska Genomic Data from Ptarmigan and Grouse, Alaska
Genetic Data from Wolverine (Gulo gulo) of North America Genetic Data from Wolverine (Gulo gulo) of North America
Genomic Data of North American Sea Ducks Genomic Data of North American Sea Ducks
Rusty Blackbird (Euphagus carolinus) Genetic Data, North America Rusty Blackbird (Euphagus carolinus) Genetic Data, North America
Genetic Data from Barrow's Goldeneye and Common Goldeneye 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 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 Genetic Data from Three Accipiter Species, North America, 1996-2014
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.
Walrus Female And Calf On An Ice Floe, Next To Another Walrus
Walrus Female And Calf On An Ice Floe, Next To Another WalrusWalruses in the Chukchi Sea during a tagging survey onboard the Norseman II in June 2010.
Walrus Female And Calf On An Ice Floe, Next To Another Walrus
Walrus Female And Calf On An Ice Floe, Next To Another WalrusWalruses 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.
Too hot for comfort: Elevated temperatures influence gene expression and exceed thermal tolerance of bigmouth shiners, Ericymba dorsalis Too hot for comfort: Elevated temperatures influence gene expression and exceed thermal tolerance of bigmouth shiners, Ericymba dorsalis
Hybridization and asymmetrical introgression between the vulnerable Gray‐Headed Chickadee and a more abundant congener, the Boreal Chickadee: Implications for conservation Hybridization and asymmetrical introgression between the vulnerable Gray‐Headed Chickadee and a more abundant congener, the Boreal Chickadee: Implications for conservation
Adoption of non‐related goslings and intergenerational family cohesion among Greenland White‐fronted Geese (Anser albifrons flavirostris) Adoption of non‐related goslings and intergenerational family cohesion among Greenland White‐fronted Geese (Anser albifrons flavirostris)
Prevalence of pelagic diatoms and harmful algae in tellinid bivalve diets during record low sea ice in the Pacific Arctic determined by DNA metabarcoding Prevalence of pelagic diatoms and harmful algae in tellinid bivalve diets during record low sea ice in the Pacific Arctic determined by DNA metabarcoding
The complete genome sequence of Splendidofilaria pectoralis (Onchocercidae, Rhabditida, Chromadorea, Nematoda) The complete genome sequence of Splendidofilaria pectoralis (Onchocercidae, Rhabditida, Chromadorea, Nematoda)
Wintering grounds leave their mark: Where birds winter influences genomic structure in Arctic nesting common eiders Wintering grounds leave their mark: Where birds winter influences genomic structure in Arctic nesting common eiders
26 August 2024 Reduced representation sequencing reveals weak genetic differentiation between Canadian and European Larus hyperboreus (Glaucous Gull) 26 August 2024 Reduced representation sequencing reveals weak genetic differentiation between Canadian and European Larus hyperboreus (Glaucous Gull)
Combined high rates of alternative breeding strategies unexpectedly found among populations of a solitary nesting raptor Combined high rates of alternative breeding strategies unexpectedly found among populations of a solitary nesting raptor
Where east meets west: Phylogeography of the high Arctic North American brant goose 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 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 Ancient bears provide insights into Pleistocene ice age refugia in Southeast Alaska
Diversity, distribution, and methodological considerations of haemosporidian infections among Galliformes in Alaska Diversity, distribution, and methodological considerations of haemosporidian infections among Galliformes in Alaska
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