Why do organochlorine differences between arctic regions vary among trophic levels?
Statistical analysis of organochlorine contaminants (OCs) in marine mammals has shown that, for most OCs, the European Arctic is more contaminated than the Canadian and U.S. Arctic. Recently, comparison of OC concentration ranges in seabirds, arctic cod (Boregadus saida), and zooplankton, found no d...
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ftunivwindsor:oai:scholar.uwindsor.ca:glierpub-1434 2023-06-11T04:07:58+02:00 Why do organochlorine differences between arctic regions vary among trophic levels? Borgå, Katrine Gabrielsen, Geir Wing Skaare, Janneche Utne Kleivane, Lars Norstrom, Ross J. Fisk, Aaron T. 2005-06-15T07:00:00Z https://scholar.uwindsor.ca/glierpub/432 https://doi.org/10.1021/es0481124 unknown Scholarship at UWindsor https://scholar.uwindsor.ca/glierpub/432 doi:10.1021/es0481124 https://doi.org/10.1021/es0481124 Great Lakes Institute for Environmental Research Publications text 2005 ftunivwindsor https://doi.org/10.1021/es0481124 2023-05-06T19:10:57Z Statistical analysis of organochlorine contaminants (OCs) in marine mammals has shown that, for most OCs, the European Arctic is more contaminated than the Canadian and U.S. Arctic. Recently, comparison of OC concentration ranges in seabirds, arctic cod (Boregadus saida), and zooplankton, found no difference between these regions. To address these inconsistencies, marine food web OC data from the European (central Barents Sea (CBS)) and Canadian Arctic (Northwater Polynya (NOW)) were simultaneously statistically analyzed. In general, concentrations of OCs were greater in seabirds and ringed seals (Phoca hispida) from the CBS as compared to the NOW; consistent with circumpolar trends observed in marine mammals. In contrast, levels of OCs were generally similar in zooplankton and arctic cod between the CBS and NOW. The main exception is HCH which had greater levels in the NOW across all trophic levels because of the greater proximity to sources in eastern Asia. The lack of differences in OC concentrations in zooplankton and Arctic cod from the European and Canadian Arctic suggest that regional differences in OC contamination in the Arctic have evened out. Reduced regional differences were not observed in marine mammals or seabirds because they are long-lived and also acquire contaminants from maternal transfer and hence reflect levels from the past when the European Arctic was more contaminated than the Canadian Arctic. In addition, seabirds may reflect exposure from other areas. This study highlights the potential problem of comparing spatial trends by using means and confidence intervals as compared to simultaneous statistical analysis of raw data. Differences in the spatial trends of OCs between trophic levels in the Arctic are important for consideration when assessing regional differences in spatial and temporal trends of discontinued and current-use contaminants. © 2005 American Chemical Society. Text Arctic cod Arctic Barents Sea Phoca hispida Zooplankton University of Windsor, Ontario: Scholarship at UWindsor Arctic Barents Sea Environmental Science & Technology 39 12 4343 4352 |
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University of Windsor, Ontario: Scholarship at UWindsor |
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ftunivwindsor |
language |
unknown |
description |
Statistical analysis of organochlorine contaminants (OCs) in marine mammals has shown that, for most OCs, the European Arctic is more contaminated than the Canadian and U.S. Arctic. Recently, comparison of OC concentration ranges in seabirds, arctic cod (Boregadus saida), and zooplankton, found no difference between these regions. To address these inconsistencies, marine food web OC data from the European (central Barents Sea (CBS)) and Canadian Arctic (Northwater Polynya (NOW)) were simultaneously statistically analyzed. In general, concentrations of OCs were greater in seabirds and ringed seals (Phoca hispida) from the CBS as compared to the NOW; consistent with circumpolar trends observed in marine mammals. In contrast, levels of OCs were generally similar in zooplankton and arctic cod between the CBS and NOW. The main exception is HCH which had greater levels in the NOW across all trophic levels because of the greater proximity to sources in eastern Asia. The lack of differences in OC concentrations in zooplankton and Arctic cod from the European and Canadian Arctic suggest that regional differences in OC contamination in the Arctic have evened out. Reduced regional differences were not observed in marine mammals or seabirds because they are long-lived and also acquire contaminants from maternal transfer and hence reflect levels from the past when the European Arctic was more contaminated than the Canadian Arctic. In addition, seabirds may reflect exposure from other areas. This study highlights the potential problem of comparing spatial trends by using means and confidence intervals as compared to simultaneous statistical analysis of raw data. Differences in the spatial trends of OCs between trophic levels in the Arctic are important for consideration when assessing regional differences in spatial and temporal trends of discontinued and current-use contaminants. © 2005 American Chemical Society. |
format |
Text |
author |
Borgå, Katrine Gabrielsen, Geir Wing Skaare, Janneche Utne Kleivane, Lars Norstrom, Ross J. Fisk, Aaron T. |
spellingShingle |
Borgå, Katrine Gabrielsen, Geir Wing Skaare, Janneche Utne Kleivane, Lars Norstrom, Ross J. Fisk, Aaron T. Why do organochlorine differences between arctic regions vary among trophic levels? |
author_facet |
Borgå, Katrine Gabrielsen, Geir Wing Skaare, Janneche Utne Kleivane, Lars Norstrom, Ross J. Fisk, Aaron T. |
author_sort |
Borgå, Katrine |
title |
Why do organochlorine differences between arctic regions vary among trophic levels? |
title_short |
Why do organochlorine differences between arctic regions vary among trophic levels? |
title_full |
Why do organochlorine differences between arctic regions vary among trophic levels? |
title_fullStr |
Why do organochlorine differences between arctic regions vary among trophic levels? |
title_full_unstemmed |
Why do organochlorine differences between arctic regions vary among trophic levels? |
title_sort |
why do organochlorine differences between arctic regions vary among trophic levels? |
publisher |
Scholarship at UWindsor |
publishDate |
2005 |
url |
https://scholar.uwindsor.ca/glierpub/432 https://doi.org/10.1021/es0481124 |
geographic |
Arctic Barents Sea |
geographic_facet |
Arctic Barents Sea |
genre |
Arctic cod Arctic Barents Sea Phoca hispida Zooplankton |
genre_facet |
Arctic cod Arctic Barents Sea Phoca hispida Zooplankton |
op_source |
Great Lakes Institute for Environmental Research Publications |
op_relation |
https://scholar.uwindsor.ca/glierpub/432 doi:10.1021/es0481124 https://doi.org/10.1021/es0481124 |
op_doi |
https://doi.org/10.1021/es0481124 |
container_title |
Environmental Science & Technology |
container_volume |
39 |
container_issue |
12 |
container_start_page |
4343 |
op_container_end_page |
4352 |
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1768381068628459520 |