PLANT CONSUMPTION BY GRIZZLY BEARS REDUCES BIOMAGNIFICATION OF SALMON‐DERIVED POLYCHLORINATED BIPHENYLS, POLYBROMINATED DIPHENYL ETHERS, AND ORGANOCHLORINE PESTICIDES
Abstract The present study characterizes the uptake and loss of persistent organic pollutants (POPs) in grizzly bears ( Ursus arctos horribilis ) by sampling and analyzing their terrestrial and marine foods and fecal material from a remote coastal watershed in British Columbia, Canada. The authors e...
Published in: | Environmental Toxicology and Chemistry |
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Online Access: | http://dx.doi.org/10.1002/etc.2162 https://api.wiley.com/onlinelibrary/tdm/v1/articles/10.1002%2Fetc.2162 https://setac.onlinelibrary.wiley.com/doi/pdf/10.1002/etc.2162 |
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crwiley:10.1002/etc.2162 2024-06-02T08:15:36+00:00 PLANT CONSUMPTION BY GRIZZLY BEARS REDUCES BIOMAGNIFICATION OF SALMON‐DERIVED POLYCHLORINATED BIPHENYLS, POLYBROMINATED DIPHENYL ETHERS, AND ORGANOCHLORINE PESTICIDES Christensen, Jennie R. Yunker, Mark B. MacDuffee, Misty Ross, Peter S. 2013 http://dx.doi.org/10.1002/etc.2162 https://api.wiley.com/onlinelibrary/tdm/v1/articles/10.1002%2Fetc.2162 https://setac.onlinelibrary.wiley.com/doi/pdf/10.1002/etc.2162 en eng Wiley http://onlinelibrary.wiley.com/termsAndConditions#vor Environmental Toxicology and Chemistry volume 32, issue 5, page 995-1005 ISSN 0730-7268 1552-8618 journal-article 2013 crwiley https://doi.org/10.1002/etc.2162 2024-05-03T10:34:00Z Abstract The present study characterizes the uptake and loss of persistent organic pollutants (POPs) in grizzly bears ( Ursus arctos horribilis ) by sampling and analyzing their terrestrial and marine foods and fecal material from a remote coastal watershed in British Columbia, Canada. The authors estimate that grizzly bears consume 341 to 1,120 µg of polychlorinated biphenyls (PCBs) and 3.9 to 33 µg of polybrominated diphenyl ethers daily in the fall when they have access to an abundant supply of returning salmon. The authors also estimate that POP elimination by grizzly bears through defecation is very low following salmon consumption (typically <2% of intake) but surprisingly high following plant consumption (>100% for PCBs and organochlorine pesticides). Excretion of individual POPs is largely driven by a combination of fugacity (differences between bear and food concentrations) and the digestibility of the food. The results of the present study are substantiated by a principal components analysis, which also demonstrates a strong role for log K OW in governing the excretion of different POPs in grizzly bears. Collectively, the present study's results reveal that grizzly bears experience a vegetation‐associated drawdown of POPs previously acquired through the consumption of salmon, to such an extent that net biomagnification is reduced. Environ. Toxicol. Chem. 2013;32:995–1005. © 2013 SETAC Article in Journal/Newspaper Ursus arctos Wiley Online Library British Columbia ENVELOPE(-125.003,-125.003,54.000,54.000) Canada Environmental Toxicology and Chemistry 32 5 995 1005 |
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Open Polar |
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Wiley Online Library |
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crwiley |
language |
English |
description |
Abstract The present study characterizes the uptake and loss of persistent organic pollutants (POPs) in grizzly bears ( Ursus arctos horribilis ) by sampling and analyzing their terrestrial and marine foods and fecal material from a remote coastal watershed in British Columbia, Canada. The authors estimate that grizzly bears consume 341 to 1,120 µg of polychlorinated biphenyls (PCBs) and 3.9 to 33 µg of polybrominated diphenyl ethers daily in the fall when they have access to an abundant supply of returning salmon. The authors also estimate that POP elimination by grizzly bears through defecation is very low following salmon consumption (typically <2% of intake) but surprisingly high following plant consumption (>100% for PCBs and organochlorine pesticides). Excretion of individual POPs is largely driven by a combination of fugacity (differences between bear and food concentrations) and the digestibility of the food. The results of the present study are substantiated by a principal components analysis, which also demonstrates a strong role for log K OW in governing the excretion of different POPs in grizzly bears. Collectively, the present study's results reveal that grizzly bears experience a vegetation‐associated drawdown of POPs previously acquired through the consumption of salmon, to such an extent that net biomagnification is reduced. Environ. Toxicol. Chem. 2013;32:995–1005. © 2013 SETAC |
format |
Article in Journal/Newspaper |
author |
Christensen, Jennie R. Yunker, Mark B. MacDuffee, Misty Ross, Peter S. |
spellingShingle |
Christensen, Jennie R. Yunker, Mark B. MacDuffee, Misty Ross, Peter S. PLANT CONSUMPTION BY GRIZZLY BEARS REDUCES BIOMAGNIFICATION OF SALMON‐DERIVED POLYCHLORINATED BIPHENYLS, POLYBROMINATED DIPHENYL ETHERS, AND ORGANOCHLORINE PESTICIDES |
author_facet |
Christensen, Jennie R. Yunker, Mark B. MacDuffee, Misty Ross, Peter S. |
author_sort |
Christensen, Jennie R. |
title |
PLANT CONSUMPTION BY GRIZZLY BEARS REDUCES BIOMAGNIFICATION OF SALMON‐DERIVED POLYCHLORINATED BIPHENYLS, POLYBROMINATED DIPHENYL ETHERS, AND ORGANOCHLORINE PESTICIDES |
title_short |
PLANT CONSUMPTION BY GRIZZLY BEARS REDUCES BIOMAGNIFICATION OF SALMON‐DERIVED POLYCHLORINATED BIPHENYLS, POLYBROMINATED DIPHENYL ETHERS, AND ORGANOCHLORINE PESTICIDES |
title_full |
PLANT CONSUMPTION BY GRIZZLY BEARS REDUCES BIOMAGNIFICATION OF SALMON‐DERIVED POLYCHLORINATED BIPHENYLS, POLYBROMINATED DIPHENYL ETHERS, AND ORGANOCHLORINE PESTICIDES |
title_fullStr |
PLANT CONSUMPTION BY GRIZZLY BEARS REDUCES BIOMAGNIFICATION OF SALMON‐DERIVED POLYCHLORINATED BIPHENYLS, POLYBROMINATED DIPHENYL ETHERS, AND ORGANOCHLORINE PESTICIDES |
title_full_unstemmed |
PLANT CONSUMPTION BY GRIZZLY BEARS REDUCES BIOMAGNIFICATION OF SALMON‐DERIVED POLYCHLORINATED BIPHENYLS, POLYBROMINATED DIPHENYL ETHERS, AND ORGANOCHLORINE PESTICIDES |
title_sort |
plant consumption by grizzly bears reduces biomagnification of salmon‐derived polychlorinated biphenyls, polybrominated diphenyl ethers, and organochlorine pesticides |
publisher |
Wiley |
publishDate |
2013 |
url |
http://dx.doi.org/10.1002/etc.2162 https://api.wiley.com/onlinelibrary/tdm/v1/articles/10.1002%2Fetc.2162 https://setac.onlinelibrary.wiley.com/doi/pdf/10.1002/etc.2162 |
long_lat |
ENVELOPE(-125.003,-125.003,54.000,54.000) |
geographic |
British Columbia Canada |
geographic_facet |
British Columbia Canada |
genre |
Ursus arctos |
genre_facet |
Ursus arctos |
op_source |
Environmental Toxicology and Chemistry volume 32, issue 5, page 995-1005 ISSN 0730-7268 1552-8618 |
op_rights |
http://onlinelibrary.wiley.com/termsAndConditions#vor |
op_doi |
https://doi.org/10.1002/etc.2162 |
container_title |
Environmental Toxicology and Chemistry |
container_volume |
32 |
container_issue |
5 |
container_start_page |
995 |
op_container_end_page |
1005 |
_version_ |
1800739845394399232 |