(Table S2) Biometric data, time of ice breakup and carbon isotopic composition of adipose tissue of polar bears (Ursus maritimus) between 1991-2007
Two global environmental issues, climate change and contamination by persistent organic pollutants, represent major concerns for arctic ecosystems. Yet, it is unclear how these two stressors interact in the Arctic. For instance, the influence of climate-associated changes in food web structure on ex...
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ftpangaea:oai:pangaea.de:doi:10.1594/PANGAEA.816156 2024-09-09T19:22:17+00:00 (Table S2) Biometric data, time of ice breakup and carbon isotopic composition of adipose tissue of polar bears (Ursus maritimus) between 1991-2007 McKinney, Melissa A Peacock, Elizabeth Letcher, Robert J LATITUDE: 60.980000 * LONGITUDE: -93.710000 * DATE/TIME START: 1991-09-01T00:00:00 * DATE/TIME END: 2007-11-01T00:00:00 2009 text/tab-separated-values, 91 data points https://doi.pangaea.de/10.1594/PANGAEA.816156 https://doi.org/10.1594/PANGAEA.816156 en eng PANGAEA https://doi.pangaea.de/10.1594/PANGAEA.816156 https://doi.org/10.1594/PANGAEA.816156 CC-BY-3.0: Creative Commons Attribution 3.0 Unported Access constraints: unrestricted info:eu-repo/semantics/openAccess Supplement to: McKinney, Melissa A; Peacock, Elizabeth; Letcher, Robert J (2009): Sea Ice-associated diet change increases the levels of chlorinated and brominated contaminants in polar bears. Environmental Science & Technology, 43(12), 4334-4339, https://doi.org/10.1021/es900471g Age comment Biological sample BIOS DATE/TIME Date/time end Day of the year Female Hudson Bay International Polar Year (2007-2008) IPY Isotope ratio mass spectrometry Male Principal component 1 Principal component 2 Principal component analyses (PCA) Sample type Standard deviation Ursus maritimus W_Hudson_Bay δ13C dataset 2009 ftpangaea https://doi.org/10.1594/PANGAEA.81615610.1021/es900471g 2024-07-24T02:31:32Z Two global environmental issues, climate change and contamination by persistent organic pollutants, represent major concerns for arctic ecosystems. Yet, it is unclear how these two stressors interact in the Arctic. For instance, the influence of climate-associated changes in food web structure on exposure to pollutants within arctic ecosystems is presently unknown. Here, we report on recent changes in feeding ecology (1991-2007) in polar bears (Ursus maritimus) from the western Hudson Bay subpopulation that have resulted in increases in the tissue concentrations of several chlorinated and brominated contaminants. Differences in timing of the annual sea ice breakup explained a significant proportion of the diet variation among years. As expected from climate change predictions, this diet change was consistent with an increase in the consumed proportions of open water-associated seal species compared to ice-associated seal species in years of earlier sea ice breakup. Our results demonstrate that climate change is a modulating influence on contaminants in this polar bear subpopulation and may pose an additional and previously unidentified threat to northern ecosystems through altered exposures to contaminants. Dataset Arctic Climate change Hudson Bay International Polar Year IPY Sea ice Ursus maritimus PANGAEA - Data Publisher for Earth & Environmental Science Arctic Hudson Bay Hudson ENVELOPE(-93.710000,-93.710000,60.980000,60.980000) |
institution |
Open Polar |
collection |
PANGAEA - Data Publisher for Earth & Environmental Science |
op_collection_id |
ftpangaea |
language |
English |
topic |
Age comment Biological sample BIOS DATE/TIME Date/time end Day of the year Female Hudson Bay International Polar Year (2007-2008) IPY Isotope ratio mass spectrometry Male Principal component 1 Principal component 2 Principal component analyses (PCA) Sample type Standard deviation Ursus maritimus W_Hudson_Bay δ13C |
spellingShingle |
Age comment Biological sample BIOS DATE/TIME Date/time end Day of the year Female Hudson Bay International Polar Year (2007-2008) IPY Isotope ratio mass spectrometry Male Principal component 1 Principal component 2 Principal component analyses (PCA) Sample type Standard deviation Ursus maritimus W_Hudson_Bay δ13C McKinney, Melissa A Peacock, Elizabeth Letcher, Robert J (Table S2) Biometric data, time of ice breakup and carbon isotopic composition of adipose tissue of polar bears (Ursus maritimus) between 1991-2007 |
topic_facet |
Age comment Biological sample BIOS DATE/TIME Date/time end Day of the year Female Hudson Bay International Polar Year (2007-2008) IPY Isotope ratio mass spectrometry Male Principal component 1 Principal component 2 Principal component analyses (PCA) Sample type Standard deviation Ursus maritimus W_Hudson_Bay δ13C |
description |
Two global environmental issues, climate change and contamination by persistent organic pollutants, represent major concerns for arctic ecosystems. Yet, it is unclear how these two stressors interact in the Arctic. For instance, the influence of climate-associated changes in food web structure on exposure to pollutants within arctic ecosystems is presently unknown. Here, we report on recent changes in feeding ecology (1991-2007) in polar bears (Ursus maritimus) from the western Hudson Bay subpopulation that have resulted in increases in the tissue concentrations of several chlorinated and brominated contaminants. Differences in timing of the annual sea ice breakup explained a significant proportion of the diet variation among years. As expected from climate change predictions, this diet change was consistent with an increase in the consumed proportions of open water-associated seal species compared to ice-associated seal species in years of earlier sea ice breakup. Our results demonstrate that climate change is a modulating influence on contaminants in this polar bear subpopulation and may pose an additional and previously unidentified threat to northern ecosystems through altered exposures to contaminants. |
format |
Dataset |
author |
McKinney, Melissa A Peacock, Elizabeth Letcher, Robert J |
author_facet |
McKinney, Melissa A Peacock, Elizabeth Letcher, Robert J |
author_sort |
McKinney, Melissa A |
title |
(Table S2) Biometric data, time of ice breakup and carbon isotopic composition of adipose tissue of polar bears (Ursus maritimus) between 1991-2007 |
title_short |
(Table S2) Biometric data, time of ice breakup and carbon isotopic composition of adipose tissue of polar bears (Ursus maritimus) between 1991-2007 |
title_full |
(Table S2) Biometric data, time of ice breakup and carbon isotopic composition of adipose tissue of polar bears (Ursus maritimus) between 1991-2007 |
title_fullStr |
(Table S2) Biometric data, time of ice breakup and carbon isotopic composition of adipose tissue of polar bears (Ursus maritimus) between 1991-2007 |
title_full_unstemmed |
(Table S2) Biometric data, time of ice breakup and carbon isotopic composition of adipose tissue of polar bears (Ursus maritimus) between 1991-2007 |
title_sort |
(table s2) biometric data, time of ice breakup and carbon isotopic composition of adipose tissue of polar bears (ursus maritimus) between 1991-2007 |
publisher |
PANGAEA |
publishDate |
2009 |
url |
https://doi.pangaea.de/10.1594/PANGAEA.816156 https://doi.org/10.1594/PANGAEA.816156 |
op_coverage |
LATITUDE: 60.980000 * LONGITUDE: -93.710000 * DATE/TIME START: 1991-09-01T00:00:00 * DATE/TIME END: 2007-11-01T00:00:00 |
long_lat |
ENVELOPE(-93.710000,-93.710000,60.980000,60.980000) |
geographic |
Arctic Hudson Bay Hudson |
geographic_facet |
Arctic Hudson Bay Hudson |
genre |
Arctic Climate change Hudson Bay International Polar Year IPY Sea ice Ursus maritimus |
genre_facet |
Arctic Climate change Hudson Bay International Polar Year IPY Sea ice Ursus maritimus |
op_source |
Supplement to: McKinney, Melissa A; Peacock, Elizabeth; Letcher, Robert J (2009): Sea Ice-associated diet change increases the levels of chlorinated and brominated contaminants in polar bears. Environmental Science & Technology, 43(12), 4334-4339, https://doi.org/10.1021/es900471g |
op_relation |
https://doi.pangaea.de/10.1594/PANGAEA.816156 https://doi.org/10.1594/PANGAEA.816156 |
op_rights |
CC-BY-3.0: Creative Commons Attribution 3.0 Unported Access constraints: unrestricted info:eu-repo/semantics/openAccess |
op_doi |
https://doi.org/10.1594/PANGAEA.81615610.1021/es900471g |
_version_ |
1809762566258294784 |