Caroline R Van Hemert, Ph.D. (Former Employee)
Science and Products
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Microbial infections are associated with embryo mortality in Arctic-nesting geese. Microbial infections are associated with embryo mortality in Arctic-nesting geese.
To address the role of bacterial infection in hatching failure of wild geese, we monitored embryo development in a breeding population of Greater white-fronted geese (Anser albifrons) on the Arctic Coastal Plain of Alaska. During 2013, we observed mortality of normally developing embryos and collected 36 addled eggs for analysis. We also collected 17 infertile eggs for comparison. Using...
Authors
Cristina M. Hansen, Brandt W. Meixell, Caroline R. Van Hemert, Rebekah F. Hare, Karsten Hueffer
Forecasting wildlife response to rapid warming in the Alaskan Arctic Forecasting wildlife response to rapid warming in the Alaskan Arctic
Arctic wildlife species face a dynamic and increasingly novel environment because of climate warming and the associated increase in human activity. Both marine and terrestrial environments are undergoing rapid environmental shifts, including loss of sea ice, permafrost degradation, and altered biogeochemical fluxes. Forecasting wildlife responses to climate change can facilitate...
Authors
Caroline R. Van Hemert, Paul L. Flint, Mark S. Udevitz, Joshua C. Koch, Todd C. Atwood, Karen L. Oakley, John M. Pearce
Environmental contaminants and chromosomal damage associated with beak deformities in a resident North American passerine Environmental contaminants and chromosomal damage associated with beak deformities in a resident North American passerine
A large cluster of beak abnormalities among black-capped chickadees (Poecile atricapillus) in Alaska raised concern about underlying environmental factors in this region. Metals and trace elements, organochlorine pesticides, polychlorinated biphenyls (PCBs), and polychlorinated dibenzo-dioxins and polychlorinated dibenzofurans (PCDD-Fs) were analyzed in adults, nestlings, and eggs of the...
Authors
Colleen M. Handel, Caroline R. Van Hemert
Avian cholera causes marine bird mortality in the Bering Sea of Alaska Avian cholera causes marine bird mortality in the Bering Sea of Alaska
The first known avian cholera outbreak among wild birds in Alaska occurred during November 2013. Liver, intestinal, and splenic necrosis consistent with avian cholera was noted, and Pasteurella multocida serotype 1 was isolated from liver and lung or spleen in Crested Auklets (Aethia cristatella), Thick-billed Murres (Uria lomvia), Common Eider (Somateria mollissima), Northern Fulmars...
Authors
Barbara L. Bodenstein, Kimberlee B. Beckmen, Gay Sheffield, Kathy Kuletz, Caroline R. Van Hemert, Brenda M. Berlowski-Zier, Valerie I. Shearn-Bochsler
Melanin-based color of plumage: role of condition and of feathers' microstructure Melanin-based color of plumage: role of condition and of feathers' microstructure
Whether melanin-based colors honestly signal a bird's condition during the growth of feathers is controversial, and it is unclear if or how the physiological processes underlying melanogenesis or color-imparting structural feather microstructure may be adversely affected by condition. Here we report results from two experiments designed to measure the effect of condition on expression of...
Authors
Liliana D’Alba, Caroline R. Van Hemert, Karen A. Spencer, Britt J. Heidinger, Lisa Gill, Neil P. Evans, Pat Monaghan, Colleen M. Handel, Matthew D. Shawkey
Wildlife health in a rapidly changing North: focus on avian disease Wildlife health in a rapidly changing North: focus on avian disease
Climate-related environmental changes have increasingly been linked to emerging infectious diseases in wildlife. The Arctic is facing a major ecological transition that is expected to substantially affect animal and human health. Changes in phenology or environmental conditions that result from climate warming may promote novel species assemblages as host and pathogen ranges expand to...
Authors
Caroline R. Van Hemert, John M. Pearce, Colleen M. Handel
Science and Products
Filter Total Items: 13
Filter Total Items: 13
No Result Found
Filter Total Items: 45
Microbial infections are associated with embryo mortality in Arctic-nesting geese. Microbial infections are associated with embryo mortality in Arctic-nesting geese.
To address the role of bacterial infection in hatching failure of wild geese, we monitored embryo development in a breeding population of Greater white-fronted geese (Anser albifrons) on the Arctic Coastal Plain of Alaska. During 2013, we observed mortality of normally developing embryos and collected 36 addled eggs for analysis. We also collected 17 infertile eggs for comparison. Using...
Authors
Cristina M. Hansen, Brandt W. Meixell, Caroline R. Van Hemert, Rebekah F. Hare, Karsten Hueffer
Forecasting wildlife response to rapid warming in the Alaskan Arctic Forecasting wildlife response to rapid warming in the Alaskan Arctic
Arctic wildlife species face a dynamic and increasingly novel environment because of climate warming and the associated increase in human activity. Both marine and terrestrial environments are undergoing rapid environmental shifts, including loss of sea ice, permafrost degradation, and altered biogeochemical fluxes. Forecasting wildlife responses to climate change can facilitate...
Authors
Caroline R. Van Hemert, Paul L. Flint, Mark S. Udevitz, Joshua C. Koch, Todd C. Atwood, Karen L. Oakley, John M. Pearce
Environmental contaminants and chromosomal damage associated with beak deformities in a resident North American passerine Environmental contaminants and chromosomal damage associated with beak deformities in a resident North American passerine
A large cluster of beak abnormalities among black-capped chickadees (Poecile atricapillus) in Alaska raised concern about underlying environmental factors in this region. Metals and trace elements, organochlorine pesticides, polychlorinated biphenyls (PCBs), and polychlorinated dibenzo-dioxins and polychlorinated dibenzofurans (PCDD-Fs) were analyzed in adults, nestlings, and eggs of the...
Authors
Colleen M. Handel, Caroline R. Van Hemert
Avian cholera causes marine bird mortality in the Bering Sea of Alaska Avian cholera causes marine bird mortality in the Bering Sea of Alaska
The first known avian cholera outbreak among wild birds in Alaska occurred during November 2013. Liver, intestinal, and splenic necrosis consistent with avian cholera was noted, and Pasteurella multocida serotype 1 was isolated from liver and lung or spleen in Crested Auklets (Aethia cristatella), Thick-billed Murres (Uria lomvia), Common Eider (Somateria mollissima), Northern Fulmars...
Authors
Barbara L. Bodenstein, Kimberlee B. Beckmen, Gay Sheffield, Kathy Kuletz, Caroline R. Van Hemert, Brenda M. Berlowski-Zier, Valerie I. Shearn-Bochsler
Melanin-based color of plumage: role of condition and of feathers' microstructure Melanin-based color of plumage: role of condition and of feathers' microstructure
Whether melanin-based colors honestly signal a bird's condition during the growth of feathers is controversial, and it is unclear if or how the physiological processes underlying melanogenesis or color-imparting structural feather microstructure may be adversely affected by condition. Here we report results from two experiments designed to measure the effect of condition on expression of...
Authors
Liliana D’Alba, Caroline R. Van Hemert, Karen A. Spencer, Britt J. Heidinger, Lisa Gill, Neil P. Evans, Pat Monaghan, Colleen M. Handel, Matthew D. Shawkey
Wildlife health in a rapidly changing North: focus on avian disease Wildlife health in a rapidly changing North: focus on avian disease
Climate-related environmental changes have increasingly been linked to emerging infectious diseases in wildlife. The Arctic is facing a major ecological transition that is expected to substantially affect animal and human health. Changes in phenology or environmental conditions that result from climate warming may promote novel species assemblages as host and pathogen ranges expand to...
Authors
Caroline R. Van Hemert, John M. Pearce, Colleen M. Handel
*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