Sarah A Sonsthagen, PhD
Assistant Unit Leader - Nebraska Cooperative Fish and Wildlife Research Unit
Dr. Sonsthagen joined the Nebraska Cooperative Fish & Wildlife Research Unit in 2020 from the U.S. Geological Survey Alaska Science Center where she studied the evolutionary relationships among Arctic vertebrate populations. Dr. Sonsthagen 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. 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. Dr. Sonsthagen has taught Population genetics, Application of genomics in conservation, and Ornithology.
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
Filter Total Items: 18
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Filter Total Items: 61
Spatial genetic structure and asymmetrical gene flow within the Pacific walrus
Pacific walruses (Odobenus rosmarus divergens) occupying shelf waters of Pacific Arctic seas migrate during spring and summer from 3 breeding areas in the Bering Sea to form sexually segregated nonbreeding aggregations. We assessed genetic relationships among 2 putative breeding populations and 6 nonbreeding aggregations. Analyses of mitochondrial DNA (mtDNA) control region sequence data suggest t
Authors
Sarah A. Sonsthagen, Chadwick V. Jay, Anthony S. Fischbach, George K. Sage, Sandra L. Talbot
Hybridization among Arctic white-headed gulls (Larus spp.) obscures the genetic legacy of the Pleistocene
We studied the influence of glacial oscillations on the genetic structure of seven species of white-headed gull that breed at high latitudes (Larus argentatus, L. canus, L. glaucescens, L. glaucoides, L. hyperboreus, L. schistisagus, and L. thayeri). We evaluated localities hypothesized as ice-free areas or glacial refugia in other Arctic vertebrates using molecular data from 11 microsatellite loc
Authors
Sarah A. Sonsthagen, R. Terry Chesser, Douglas A. Bell, Carla J. Dove
Colonizing the world in spite of reduced MHC variation
Reduced immune gene diversity is thought to negatively affect the capacity of organisms to adapt to pathogen challenges, which represent a major force in natural selection. Genes of the Major Histocompatibility Complex (MHC) are the most widely invoked adaptive loci in conservation biology, and have become the most popular genetic markers to investigate pathogen-host interactions in vertebrates. A
Authors
L. Gangoso, M. Alcaide, J.M. Grande, J. Muñoz, Sandra L. Talbot, Sarah A. Sonsthagen, G. Kevin Sage, J. Figuerola
Polymorphic microsatellite loci identified through development and cross-species amplification within shorebirds
We developed microsatellite loci for demographic assessments of shorebirds, a group with limited markers. First, we isolated five dinucleotide repeat microsatellite loci from the Black Oystercatcher (Haematopodidae: Haematopus bachmani), and three from the Bristle-thighed Curlew (Scolopacidae: Numenius tahitiensis); both species are of conservation concern. All eight loci were polymorphic in their
Authors
I. Williams, Brian M. Guzzetti, Judy R. Gust, G. Kevin Sage, Robert E. Gill, T. Lee Tibbitts, Sarah A. Sonsthagen, Sandra L. Talbot
Identification of metapopulation dynamics among Northern Goshawks of the Alexander Archipelago, Alaska, and Coastal British Columbia
Northern Goshawks occupying the Alexander Archipelago, Alaska, and coastal British Columbia nest primarily in old-growth and mature forest, which results in spatial heterogeneity in the distribution of individuals across the landscape. We used microsatellite and mitochondrial data to infer genetic structure, gene flow, and fluctuations in population demography through evolutionary time. Patterns i
Authors
Sarah A. Sonsthagen, Erica L. McClaren, Frank I. Doyle, K. Titus, George K. Sage, Robert E. Wilson, Judy R. Gust, Sandra L. Talbot
Genetic diversity of a newly established population of golden eagles on the Channel Islands, California
Gene flow can have profound effects on the genetic diversity of a founding population depending on the number and relationship among colonizers and the duration of the colonization event. Here we used data from nuclear microsatellite and mitochondrial DNA control region loci to assess genetic diversity in golden eagles of the recently colonized Channel Islands, California. Genetic diversity in the
Authors
Sarah A. Sonsthagen, Timothy J. Coonan, Brian C. Latta, George K. Sage, Sandra L. Talbot
Genetic and morphological divergence among Cooper's Hawk (Accipiter cooperii) populations breeding in north-central and western North America
Cooper's Hawk (Accipiter cooperii) populations breeding in the northern portion of the species' range exhibit variation in morphological traits that conforms to predictions based on differences in prey size, tree stand density, and migratory behavior. We examined genetic structure and gene flow and compared divergence at morphological traits (PST) and genetic markers (FST) to elucidate mechanisms
Authors
Sarah A. Sonsthagen, Robert N. Rosenfield, John Bielefeldt, Robert K. Murphy, Andrew C. Stewart, William C. Stout, Timothy G. Driscoll, Michael A. Bozek, Brian L. Sloss, Sandra L. Talbot
Lack of genetic polymorphism among peregrine falcons Falco peregrinus of Fiji
We compared levels of genetic diversity and isolation among peregrine falcons Falco peregrinus from two South Pacific island complexes (Fiji and Vanuatu: F. p. nesiotes), relative to other island and mainland populations. Fragment data from 12 microsatellite loci and sequence information from the control region of the mitochondrial DNA indicated levels of genetic variation in the South Pacific pop
Authors
Sandra L. Talbot, Angela G. Palmer, George K. Sage, Sarah A. Sonsthagen, Ted Swem, Daniel J. Brimm, Clayton M White
Multilocus phylogeography and population structure of common eiders breeding in North America and Scandinavia
Aim Glacial refugia during the Pleistocene had major impacts on the levels and spatial apportionment of genetic diversity of species in northern latitude ecosystems. We characterized patterns of population subdivision, and tested hypotheses associated with locations of potential Pleistocene refugia and the relative contribution of these refugia to the post-glacial colonization of North America an
Authors
Sarah A. Sonsthagen, Sandra L. Talbot, Kim T. Scribner, Kevin G. McCracken
Do common eiders nest in kin groups? Microgeographic genetic structure in a philopatric sea duck
We investigated local genetic associations among female Pacific common eiders (Somateria mollissima v-nigrum) nesting in a stochastic Arctic environment within two groups of barrier islands (Simpson Lagoon and Mikkelsen Bay) in the Beaufort Sea, Alaska. Nonrandom genetic associations were observed among nesting females using regional spatial autocorrelation analyses for distance classes up to 1000
Authors
Sarah A. Sonsthagen, Sandra L. Talbot, Richard B. Lanctot, Kevin G. McCracken
Hierarchical spatial genetic structure of Common Eiders (Somateria mollissima) breeding along a migratory corridor
Documentation of spatial genetic discordance among breeding populations of Arctic-nesting avian species is important, because anthropogenic change is altering environmental linkages at micro- and macrogeographic scales. We estimated levels of population subdivision within Pacific Common Eiders (Somateria mollissima v-nigrum) breeding on 12 barrier islands in the western Beaufort Sea, Alaska, using
Authors
Sarah A. Sonsthagen, Sandra L. Talbot, Richard B. Lanctot, Kim T. Scribner, Kevin G. McCracken
Genetic characterization of Common Eiders breeding in the Yukon-Kuskokwim Delta, Alaska
We assessed population genetic subdivision among four colonies of Common Eiders (Somateria mollissima v-nigrum) breeding in the Yukon-Kuskokwim Delta (YKD), Alaska, using microsatellite genotypes and DNA sequences with differing modes of inheritance. Significant, albeit low, levels of genetic differentiation were observed between mainland populations and Kigigak Island for nuclear intron lamin A a
Authors
Sarah A. Sonsthagen, Sandra L. Talbot, Kevin G. McCracken
Non-USGS Publications**
Pons, J.-M., S.A. Sonsthagen, C. Dove, P.A. Crochet. 2014. Extensive mitochondrial introgression in North American Great Black-backed Gulls (Larus marinus) from the American Herring Gull (Larus smithsonianus) with little nuclear DNA impact. Heredity. 112:226–239. doi:10.1038/hdy.2013.98
Wilson, R.E., M.D. Eaton, S.A. Sonsthagen, J.L. Peters, K.P. Johnson, B. Simarra, and K.G. McCracken. 2011. Speciation and subspecies divergence in Cinnamon Teal and Blue-winged Teal. Condor. 13:747–761.
Cibois, A., J.S. Beadell, G.R. Graves, E. Pasquet, B. Slika, S.A. Sonsthagen, J.-C. Thibault, and R.C. Fleischer. 2011. Charting the course of reed-warblers across the Pacific islands. Journal of Biogeography. 38:1963–1975.
Driskell, A.C., J.A. Norman, S. Pruett-Jones, E. Mangall, S.A. Sonsthagen, L. Christidis. 2011. A multigene phylogeny examining evolutionary and ecological relationships in the Australo-Papuan wrens of the subfamily Malurinae (Aves). Molecular Phylogenetics and Evolution. 60:480–485.
McCracken, K.G., C.P. Barger, M. Bulgarella, K.P. Johnson, S.A. Sonsthagen, T.H. Valqui, R.E. Wilson, K. Winker, and M.D. Sorenson. 2009. Parallel adaptation to high-altitude hypoxia in the major hemoglobin of eight Andean duck species. Molecular Ecology. 18:3992–4005.
Cooper, S.J., and S. Sonsthagen. 2007. Heat production from foraging activity contributes to thermoregulation in Black-capped Chickadees. Condor. 109:446–451.
Wilson, R.E., S.A. Sonsthagen, C.P. Barger, and K.G. McCracken. 2007. Asymmetric molt or feather wear in Flying Steamer Ducks (Tachyeres patachonicus) from coastal habitats in Argentina. Ornitologia Neotropical. 18:293–300.
Sonsthagen, S.A., R. Rodriguez, and C.M. White. 2006. Satellite telemetry of Northern Goshawks breeding in Utah–I. Annual movements. Studies in Avian Biology. 31:239–251.
Sonsthagen, S.A., R. Rodriguez, and C.M. White. 2006. Satellite telemetry of Northern Goshawks breeding in Utah–II. Annual habitats. Studies in Avian Biology. 31:252–259.
Gustavson, K.E., S.A. Sonsthagen, R. Crunkilton, and J.M. Harkin. 2000. Groundwater toxicity assessment using bioassay, chemical, and TIE analyses. Environmental Toxicology. 15:421–430.
Rosenfield, R.N., J. Bielefeldt, S. Sonsthagen, and T. Booms. 2000. Comparable reproductive success at conifer plantation and non-plantation nest sites for Cooper’s Hawks in Wisconsin. Wilson Bulletin. 112:417–421.
**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
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- Publications
Filter Total Items: 61
Spatial genetic structure and asymmetrical gene flow within the Pacific walrus
Pacific walruses (Odobenus rosmarus divergens) occupying shelf waters of Pacific Arctic seas migrate during spring and summer from 3 breeding areas in the Bering Sea to form sexually segregated nonbreeding aggregations. We assessed genetic relationships among 2 putative breeding populations and 6 nonbreeding aggregations. Analyses of mitochondrial DNA (mtDNA) control region sequence data suggest tAuthorsSarah A. Sonsthagen, Chadwick V. Jay, Anthony S. Fischbach, George K. Sage, Sandra L. TalbotHybridization among Arctic white-headed gulls (Larus spp.) obscures the genetic legacy of the Pleistocene
We studied the influence of glacial oscillations on the genetic structure of seven species of white-headed gull that breed at high latitudes (Larus argentatus, L. canus, L. glaucescens, L. glaucoides, L. hyperboreus, L. schistisagus, and L. thayeri). We evaluated localities hypothesized as ice-free areas or glacial refugia in other Arctic vertebrates using molecular data from 11 microsatellite locAuthorsSarah A. Sonsthagen, R. Terry Chesser, Douglas A. Bell, Carla J. DoveColonizing the world in spite of reduced MHC variation
Reduced immune gene diversity is thought to negatively affect the capacity of organisms to adapt to pathogen challenges, which represent a major force in natural selection. Genes of the Major Histocompatibility Complex (MHC) are the most widely invoked adaptive loci in conservation biology, and have become the most popular genetic markers to investigate pathogen-host interactions in vertebrates. AAuthorsL. Gangoso, M. Alcaide, J.M. Grande, J. Muñoz, Sandra L. Talbot, Sarah A. Sonsthagen, G. Kevin Sage, J. FiguerolaPolymorphic microsatellite loci identified through development and cross-species amplification within shorebirds
We developed microsatellite loci for demographic assessments of shorebirds, a group with limited markers. First, we isolated five dinucleotide repeat microsatellite loci from the Black Oystercatcher (Haematopodidae: Haematopus bachmani), and three from the Bristle-thighed Curlew (Scolopacidae: Numenius tahitiensis); both species are of conservation concern. All eight loci were polymorphic in theirAuthorsI. Williams, Brian M. Guzzetti, Judy R. Gust, G. Kevin Sage, Robert E. Gill, T. Lee Tibbitts, Sarah A. Sonsthagen, Sandra L. TalbotIdentification of metapopulation dynamics among Northern Goshawks of the Alexander Archipelago, Alaska, and Coastal British Columbia
Northern Goshawks occupying the Alexander Archipelago, Alaska, and coastal British Columbia nest primarily in old-growth and mature forest, which results in spatial heterogeneity in the distribution of individuals across the landscape. We used microsatellite and mitochondrial data to infer genetic structure, gene flow, and fluctuations in population demography through evolutionary time. Patterns iAuthorsSarah A. Sonsthagen, Erica L. McClaren, Frank I. Doyle, K. Titus, George K. Sage, Robert E. Wilson, Judy R. Gust, Sandra L. TalbotGenetic diversity of a newly established population of golden eagles on the Channel Islands, California
Gene flow can have profound effects on the genetic diversity of a founding population depending on the number and relationship among colonizers and the duration of the colonization event. Here we used data from nuclear microsatellite and mitochondrial DNA control region loci to assess genetic diversity in golden eagles of the recently colonized Channel Islands, California. Genetic diversity in theAuthorsSarah A. Sonsthagen, Timothy J. Coonan, Brian C. Latta, George K. Sage, Sandra L. TalbotGenetic and morphological divergence among Cooper's Hawk (Accipiter cooperii) populations breeding in north-central and western North America
Cooper's Hawk (Accipiter cooperii) populations breeding in the northern portion of the species' range exhibit variation in morphological traits that conforms to predictions based on differences in prey size, tree stand density, and migratory behavior. We examined genetic structure and gene flow and compared divergence at morphological traits (PST) and genetic markers (FST) to elucidate mechanismsAuthorsSarah A. Sonsthagen, Robert N. Rosenfield, John Bielefeldt, Robert K. Murphy, Andrew C. Stewart, William C. Stout, Timothy G. Driscoll, Michael A. Bozek, Brian L. Sloss, Sandra L. TalbotLack of genetic polymorphism among peregrine falcons Falco peregrinus of Fiji
We compared levels of genetic diversity and isolation among peregrine falcons Falco peregrinus from two South Pacific island complexes (Fiji and Vanuatu: F. p. nesiotes), relative to other island and mainland populations. Fragment data from 12 microsatellite loci and sequence information from the control region of the mitochondrial DNA indicated levels of genetic variation in the South Pacific popAuthorsSandra L. Talbot, Angela G. Palmer, George K. Sage, Sarah A. Sonsthagen, Ted Swem, Daniel J. Brimm, Clayton M WhiteMultilocus phylogeography and population structure of common eiders breeding in North America and Scandinavia
Aim Glacial refugia during the Pleistocene had major impacts on the levels and spatial apportionment of genetic diversity of species in northern latitude ecosystems. We characterized patterns of population subdivision, and tested hypotheses associated with locations of potential Pleistocene refugia and the relative contribution of these refugia to the post-glacial colonization of North America anAuthorsSarah A. Sonsthagen, Sandra L. Talbot, Kim T. Scribner, Kevin G. McCrackenDo common eiders nest in kin groups? Microgeographic genetic structure in a philopatric sea duck
We investigated local genetic associations among female Pacific common eiders (Somateria mollissima v-nigrum) nesting in a stochastic Arctic environment within two groups of barrier islands (Simpson Lagoon and Mikkelsen Bay) in the Beaufort Sea, Alaska. Nonrandom genetic associations were observed among nesting females using regional spatial autocorrelation analyses for distance classes up to 1000AuthorsSarah A. Sonsthagen, Sandra L. Talbot, Richard B. Lanctot, Kevin G. McCrackenHierarchical spatial genetic structure of Common Eiders (Somateria mollissima) breeding along a migratory corridor
Documentation of spatial genetic discordance among breeding populations of Arctic-nesting avian species is important, because anthropogenic change is altering environmental linkages at micro- and macrogeographic scales. We estimated levels of population subdivision within Pacific Common Eiders (Somateria mollissima v-nigrum) breeding on 12 barrier islands in the western Beaufort Sea, Alaska, usingAuthorsSarah A. Sonsthagen, Sandra L. Talbot, Richard B. Lanctot, Kim T. Scribner, Kevin G. McCrackenGenetic characterization of Common Eiders breeding in the Yukon-Kuskokwim Delta, Alaska
We assessed population genetic subdivision among four colonies of Common Eiders (Somateria mollissima v-nigrum) breeding in the Yukon-Kuskokwim Delta (YKD), Alaska, using microsatellite genotypes and DNA sequences with differing modes of inheritance. Significant, albeit low, levels of genetic differentiation were observed between mainland populations and Kigigak Island for nuclear intron lamin A aAuthorsSarah A. Sonsthagen, Sandra L. Talbot, Kevin G. McCrackenNon-USGS Publications**
Pons, J.-M., S.A. Sonsthagen, C. Dove, P.A. Crochet. 2014. Extensive mitochondrial introgression in North American Great Black-backed Gulls (Larus marinus) from the American Herring Gull (Larus smithsonianus) with little nuclear DNA impact. Heredity. 112:226–239. doi:10.1038/hdy.2013.98Wilson, R.E., M.D. Eaton, S.A. Sonsthagen, J.L. Peters, K.P. Johnson, B. Simarra, and K.G. McCracken. 2011. Speciation and subspecies divergence in Cinnamon Teal and Blue-winged Teal. Condor. 13:747–761.Cibois, A., J.S. Beadell, G.R. Graves, E. Pasquet, B. Slika, S.A. Sonsthagen, J.-C. Thibault, and R.C. Fleischer. 2011. Charting the course of reed-warblers across the Pacific islands. Journal of Biogeography. 38:1963–1975.Driskell, A.C., J.A. Norman, S. Pruett-Jones, E. Mangall, S.A. Sonsthagen, L. Christidis. 2011. A multigene phylogeny examining evolutionary and ecological relationships in the Australo-Papuan wrens of the subfamily Malurinae (Aves). Molecular Phylogenetics and Evolution. 60:480–485.McCracken, K.G., C.P. Barger, M. Bulgarella, K.P. Johnson, S.A. Sonsthagen, T.H. Valqui, R.E. Wilson, K. Winker, and M.D. Sorenson. 2009. Parallel adaptation to high-altitude hypoxia in the major hemoglobin of eight Andean duck species. Molecular Ecology. 18:3992–4005.Cooper, S.J., and S. Sonsthagen. 2007. Heat production from foraging activity contributes to thermoregulation in Black-capped Chickadees. Condor. 109:446–451.Wilson, R.E., S.A. Sonsthagen, C.P. Barger, and K.G. McCracken. 2007. Asymmetric molt or feather wear in Flying Steamer Ducks (Tachyeres patachonicus) from coastal habitats in Argentina. Ornitologia Neotropical. 18:293–300.Sonsthagen, S.A., R. Rodriguez, and C.M. White. 2006. Satellite telemetry of Northern Goshawks breeding in Utah–I. Annual movements. Studies in Avian Biology. 31:239–251.Sonsthagen, S.A., R. Rodriguez, and C.M. White. 2006. Satellite telemetry of Northern Goshawks breeding in Utah–II. Annual habitats. Studies in Avian Biology. 31:252–259.Gustavson, K.E., S.A. Sonsthagen, R. Crunkilton, and J.M. Harkin. 2000. Groundwater toxicity assessment using bioassay, chemical, and TIE analyses. Environmental Toxicology. 15:421–430.Rosenfield, R.N., J. Bielefeldt, S. Sonsthagen, and T. Booms. 2000. Comparable reproductive success at conifer plantation and non-plantation nest sites for Cooper’s Hawks in Wisconsin. Wilson Bulletin. 112:417–421.**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