Illuminating the Historical Ecology of Polar Bears (Ursus Maritimus) from the Lancaster Sound Subpopulation, Nunavut, using Stable Isotope Analysis
Polar bears (Ursus maritimus) are among the Arctic species that are most threatened by climate change. However, little is known about the ecology of polar bears over extended temporal intervals (>50 years). The goal of my thesis is to determine whether historic polar bears from the Lancaster Soun...
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ftcarletonuniv:oai:curve.carleton.ca:38766 2023-05-15T14:55:13+02:00 Illuminating the Historical Ecology of Polar Bears (Ursus Maritimus) from the Lancaster Sound Subpopulation, Nunavut, using Stable Isotope Analysis Landry, Zoe Ann 2021 https://curve.carleton.ca/1dd9ddd1-396a-482e-a37b-80315e2bf621 https://doi.org/10.22215/etd/2021-14623 unknown https://curve.carleton.ca/1dd9ddd1-396a-482e-a37b-80315e2bf621 https://doi.org/10.22215/etd/2021-14623 Thesis/Dissertation 2021 ftcarletonuniv https://doi.org/10.22215/etd/2021-14623 2022-01-23T08:04:16Z Polar bears (Ursus maritimus) are among the Arctic species that are most threatened by climate change. However, little is known about the ecology of polar bears over extended temporal intervals (>50 years). The goal of my thesis is to determine whether historic polar bears from the Lancaster Sound subpopulation underwent ecological shifts in response to a changing Arctic climate throughout the 20th century (1920s-1970s) using stable isotope analysis. Historic polar bears did not undergo significant dietary shifts, remaining apex predators. The consistent reliance on seals and whales as their primary prey indicates continued access to optimal hunting conditions (i.e., sea ice). There is evidence that suggests environmental changes occurred from 1950-1970. This thesis offers novel insights into the historical ecology of polar bears, and provides a long-term isotopic baseline for polar bear ecology that will enable future studies to assess ongoing ecological changes of modern polar bears. Thesis Arctic Climate change Lancaster Sound Nunavut Sea ice Ursus maritimus CURVE - Carleton University Research Virtual Environment Arctic Nunavut Lancaster Sound ENVELOPE(-83.999,-83.999,74.218,74.218) |
institution |
Open Polar |
collection |
CURVE - Carleton University Research Virtual Environment |
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ftcarletonuniv |
language |
unknown |
description |
Polar bears (Ursus maritimus) are among the Arctic species that are most threatened by climate change. However, little is known about the ecology of polar bears over extended temporal intervals (>50 years). The goal of my thesis is to determine whether historic polar bears from the Lancaster Sound subpopulation underwent ecological shifts in response to a changing Arctic climate throughout the 20th century (1920s-1970s) using stable isotope analysis. Historic polar bears did not undergo significant dietary shifts, remaining apex predators. The consistent reliance on seals and whales as their primary prey indicates continued access to optimal hunting conditions (i.e., sea ice). There is evidence that suggests environmental changes occurred from 1950-1970. This thesis offers novel insights into the historical ecology of polar bears, and provides a long-term isotopic baseline for polar bear ecology that will enable future studies to assess ongoing ecological changes of modern polar bears. |
format |
Thesis |
author |
Landry, Zoe Ann |
spellingShingle |
Landry, Zoe Ann Illuminating the Historical Ecology of Polar Bears (Ursus Maritimus) from the Lancaster Sound Subpopulation, Nunavut, using Stable Isotope Analysis |
author_facet |
Landry, Zoe Ann |
author_sort |
Landry, Zoe Ann |
title |
Illuminating the Historical Ecology of Polar Bears (Ursus Maritimus) from the Lancaster Sound Subpopulation, Nunavut, using Stable Isotope Analysis |
title_short |
Illuminating the Historical Ecology of Polar Bears (Ursus Maritimus) from the Lancaster Sound Subpopulation, Nunavut, using Stable Isotope Analysis |
title_full |
Illuminating the Historical Ecology of Polar Bears (Ursus Maritimus) from the Lancaster Sound Subpopulation, Nunavut, using Stable Isotope Analysis |
title_fullStr |
Illuminating the Historical Ecology of Polar Bears (Ursus Maritimus) from the Lancaster Sound Subpopulation, Nunavut, using Stable Isotope Analysis |
title_full_unstemmed |
Illuminating the Historical Ecology of Polar Bears (Ursus Maritimus) from the Lancaster Sound Subpopulation, Nunavut, using Stable Isotope Analysis |
title_sort |
illuminating the historical ecology of polar bears (ursus maritimus) from the lancaster sound subpopulation, nunavut, using stable isotope analysis |
publishDate |
2021 |
url |
https://curve.carleton.ca/1dd9ddd1-396a-482e-a37b-80315e2bf621 https://doi.org/10.22215/etd/2021-14623 |
long_lat |
ENVELOPE(-83.999,-83.999,74.218,74.218) |
geographic |
Arctic Nunavut Lancaster Sound |
geographic_facet |
Arctic Nunavut Lancaster Sound |
genre |
Arctic Climate change Lancaster Sound Nunavut Sea ice Ursus maritimus |
genre_facet |
Arctic Climate change Lancaster Sound Nunavut Sea ice Ursus maritimus |
op_relation |
https://curve.carleton.ca/1dd9ddd1-396a-482e-a37b-80315e2bf621 https://doi.org/10.22215/etd/2021-14623 |
op_doi |
https://doi.org/10.22215/etd/2021-14623 |
_version_ |
1766327001883344896 |