Výsledky vyhledávání - "Ashley D, Ehrman"

Akademický článek

Isotopic and traits-based trophic diversity of Canadian Beaufort Sea benthic communities in relation to food supply

Autor: Ashley D. Ehrman, Heidi Swanson, Shannon MacPhee, Andrew Majewski, Philippe Archambault, Jane Eert, James Reist, Michael Power

Publikováno v: Arctic Science, Vol 8, Iss 4, Pp 1148-1164 (2022)

In the Arctic, climate-driven alterations to the quality and quantity of organic matter reaching the seafloor will likely affect benthic food web function. We used biomass-weighted diversity measures based on trophic traits (those related to feeding

Externí odkaz: https://doaj.org/article/f3470524a89f4cd7aa668252ffdb374d

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Variation in the diet of beluga whales in response to changes in prey availability: insights on changes in the Beaufort Sea ecosystem

Autor: Emily S. Choy, Michael Power, Lisa L. Loseto, Ashley D. Ehrman, Carolina Giraldo, Bruno Rosenberg, Heidi K. Swanson, Andrew Majewski, James D Reist, James D. Roth

Publikováno v: Marine Ecology Progress Series. 647:195-210

The eastern Beaufort Sea (EBS) beluga whaleDelphinapterus leucaspopulation has experienced a 20 yr decline in inferred growth rates of individuals, which is hypothesized to have resulted from changes in prey availability. We used fatty acid signature

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::0fa36f8034f6ed1a8cfcad71a494a5e4
https://doi.org/10.3354/meps13413

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Contrasting Temporal Patterns of Mercury, Niche Dynamics, and Body Fat Indices of Polar Bears and Ringed Seals in a Melting Icescape

Autor: Cassandra D Debets, Brent G. Young, Amy C. Johnson, David J. Yurkowski, Magali Houde, Nicholas J. Lunn, Gregory W. Thiemann, Steven H. Ferguson, Andrew E. Derocher, Derek C. G. Muir, Evan S. Richardson, Luana Sciullo, Ashley D. Ehrman

Publikováno v: Environmental Science & Technology. 54:2780-2789

Polar bears (Ursus maritimus) and ringed seals (Pusa hispida) have a strong predator-prey relationship and are facing climate-associated Arctic habitat loss and harmful dietary exposure to total mercury (THg) and other pollutants. However, little is

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::fc58485649e3c73195dfb1547586adeb
https://doi.org/10.1021/acs.est.9b06656

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The Canadian Beaufort Shelf trophic structure: evaluating an ecosystem modelling approach by comparison with observed stable isotopic structure

Autor: Heidi K. Swanson, Michael Power, Karyn D. Suchy, Jasmine D. Brewster, J. D. Reist, Ashley D. Ehrman, Carolina Giraldo, Carie Hoover, Lisa L. Loseto, Shannon A. MacPhee

Publikováno v: Arctic Science (2368-7460) (Canadian Science Publishing), 2022-03, Vol. 8, N. 1, P. 292-312

Climate-driven impacts on marine trophic pathways worldwide are compounded by sea-ice loss at northern latitudes. For the Arctic, current information describing food-web linkages is fragmented, and there is a need for tools that can describe overarch

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::8e4d5592975d4c57ea5402a18643ee42
https://archimer.ifremer.fr/doc/00709/82155/

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A meta-collection of nitrogen stable isotope data measured in Arctic marine organisms from the Canadian Beaufort Sea, 1983–2013

Autor: Carie Hoover, Jasmine D. Brewster, Ashley D. Ehrman, James D. Reist, Carolina Giraldo, Heidi K. Swanson, Lisa L. Loseto, Andrea Niemi, Michael Power, Wojciech Walkusz, Shannon A. MacPhee, Christine Michel

Publikováno v: BMC Research Notes, Vol 14, Iss 1, Pp 1-3 (2021)
Bmc Research Notes (1756-0500) (Springer Science and Business Media LLC), 2021-09, Vol. 14, N. 1, P. 347 (3p.)
BMC Research Notes

Objectives Existing information on Arctic marine food web structure is fragmented. Integrating data across research programs is an important strategy for building a baseline understanding of food web structure and function in many Arctic regions. Nat

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::1a586eed0f8e69259f9a15a1d3801359
https://hdl.handle.net/1993/36027

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Mercury biomagnification in benthic, pelagic, and benthopelagic food webs in an Arctic marine ecosystem

Autor: Isabel R, Hilgendag, Heidi K, Swanson, Christopher W, Lewis, Ashley D, Ehrman, Michael, Power

Publikováno v: Science of The Total Environment. 841:156424

Mercury (Hg) is a ubiquitous toxic metal that biomagnifies in food webs, and can reach high concentrations in top predators. Evaluating Hg biomagnification in Arctic marine food webs is critical for understanding Hg dynamics and estimating exposure t

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::8993c880d323cca62a98c29a27069e5c
https://doi.org/10.1016/j.scitotenv.2022.156424

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Dietary and non-dietary contributions to among-individual variation in carbon and nitrogen isotopic composition of lake trout

Autor: Ashley D. Ehrman, Heidi K. Swanson, Thomas A. Johnston, J.J. Montgomery

Publikováno v: Ecological Indicators, Vol 123, Iss, Pp 107349-(2021)

Variation among individuals in stable isotope composition is increasingly being used as an ecological index of trophic niche size. This is based on the assumption that most of the observed variation arises from differences in diet. We tested this ass

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::7eeed48aabcccec8a0ed67560fe246a0
http://www.sciencedirect.com/science/article/pii/S1470160X21000145

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