Legacy contaminants in the eastern Beaufort Sea beluga whales (Delphinapterus leucas): are temporal trends reflecting regulations?
Once deposited onto Arctic ecosystems, persistent organic pollutants (POPs) biomagnify in foodwebs such that relatively high levels have been detected in predators like beluga whales (Delphinapterus leucas). Our study aimed at assessing temporal trends of legacy POPs in eastern Beaufort Sea beluga b...
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ftdoajarticles:oai:doaj.org/article:7672479dabd04a05a85afd846af3bedf 2023-05-15T14:23:40+02:00 Legacy contaminants in the eastern Beaufort Sea beluga whales (Delphinapterus leucas): are temporal trends reflecting regulations? Marie Noël Lisa L. Loseto Gary Stern 2018-09-01T00:00:00Z https://doi.org/10.1139/as-2017-0049 https://doaj.org/article/7672479dabd04a05a85afd846af3bedf EN FR eng fre Canadian Science Publishing https://doi.org/10.1139/as-2017-0049 https://doaj.org/toc/2368-7460 doi:10.1139/as-2017-0049 2368-7460 https://doaj.org/article/7672479dabd04a05a85afd846af3bedf Arctic Science, Vol 4, Iss 3, Pp 373-387 (2018) pcbs ddt hch inuvialuit settlement region beluga whale Environmental sciences GE1-350 Environmental engineering TA170-171 article 2018 ftdoajarticles https://doi.org/10.1139/as-2017-0049 2022-12-31T05:55:49Z Once deposited onto Arctic ecosystems, persistent organic pollutants (POPs) biomagnify in foodwebs such that relatively high levels have been detected in predators like beluga whales (Delphinapterus leucas). Our study aimed at assessing temporal trends of legacy POPs in eastern Beaufort Sea beluga blubber collected during traditional harvests in the Mackenzie Estuary area, Northwest Territories. Concentrations of polychlorinated biphenyls (PCBs) and 14 pesticides were quantified in 185 blubber samples collected between 1989 and 2015. The majority of legacy POPs analyzed showed no significant changes during the study period (ΣPCBs, Σchlordanes, Σdichlorodiphenyltrichloroethane, hexachlorobenzene, dieldrin, and mirex) and, therefore, did not reflect regulations put into place over the past decades. Although α- (82.6 ± 12.6 and 15.9 ± 1.9 ng/g in 1989 and 2015, respectively) and γ-hexachlorocyclohexane (γ-HCH) (126.6 ± 23.9 and 13.9 ± 0.9 ng/g, respectively) showed significant decrease between 1989 and 2015, β-HCH showed a more complex trend with concentrations increasing between 1989 (71.2 ± 13.4 ng/g) and 2004 (276.8 ± 13.5 ng/g) before decreasing until 2015 (174.7 ± 8.3 ng/g). Differences in trends likely reflect physico-chemical properties affecting transport to the Arctic. With climate change and melting sea ice potentially affecting the transport and release of legacy POPs, continuous monitoring is necessary. Article in Journal/Newspaper Arctic Arctic Beaufort Sea Beluga Beluga whale Beluga* Climate change Delphinapterus leucas Inuvialuit Northwest Territories Sea ice Directory of Open Access Journals: DOAJ Articles Arctic Northwest Territories Arctic Science |
institution |
Open Polar |
collection |
Directory of Open Access Journals: DOAJ Articles |
op_collection_id |
ftdoajarticles |
language |
English French |
topic |
pcbs ddt hch inuvialuit settlement region beluga whale Environmental sciences GE1-350 Environmental engineering TA170-171 |
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pcbs ddt hch inuvialuit settlement region beluga whale Environmental sciences GE1-350 Environmental engineering TA170-171 Marie Noël Lisa L. Loseto Gary Stern Legacy contaminants in the eastern Beaufort Sea beluga whales (Delphinapterus leucas): are temporal trends reflecting regulations? |
topic_facet |
pcbs ddt hch inuvialuit settlement region beluga whale Environmental sciences GE1-350 Environmental engineering TA170-171 |
description |
Once deposited onto Arctic ecosystems, persistent organic pollutants (POPs) biomagnify in foodwebs such that relatively high levels have been detected in predators like beluga whales (Delphinapterus leucas). Our study aimed at assessing temporal trends of legacy POPs in eastern Beaufort Sea beluga blubber collected during traditional harvests in the Mackenzie Estuary area, Northwest Territories. Concentrations of polychlorinated biphenyls (PCBs) and 14 pesticides were quantified in 185 blubber samples collected between 1989 and 2015. The majority of legacy POPs analyzed showed no significant changes during the study period (ΣPCBs, Σchlordanes, Σdichlorodiphenyltrichloroethane, hexachlorobenzene, dieldrin, and mirex) and, therefore, did not reflect regulations put into place over the past decades. Although α- (82.6 ± 12.6 and 15.9 ± 1.9 ng/g in 1989 and 2015, respectively) and γ-hexachlorocyclohexane (γ-HCH) (126.6 ± 23.9 and 13.9 ± 0.9 ng/g, respectively) showed significant decrease between 1989 and 2015, β-HCH showed a more complex trend with concentrations increasing between 1989 (71.2 ± 13.4 ng/g) and 2004 (276.8 ± 13.5 ng/g) before decreasing until 2015 (174.7 ± 8.3 ng/g). Differences in trends likely reflect physico-chemical properties affecting transport to the Arctic. With climate change and melting sea ice potentially affecting the transport and release of legacy POPs, continuous monitoring is necessary. |
format |
Article in Journal/Newspaper |
author |
Marie Noël Lisa L. Loseto Gary Stern |
author_facet |
Marie Noël Lisa L. Loseto Gary Stern |
author_sort |
Marie Noël |
title |
Legacy contaminants in the eastern Beaufort Sea beluga whales (Delphinapterus leucas): are temporal trends reflecting regulations? |
title_short |
Legacy contaminants in the eastern Beaufort Sea beluga whales (Delphinapterus leucas): are temporal trends reflecting regulations? |
title_full |
Legacy contaminants in the eastern Beaufort Sea beluga whales (Delphinapterus leucas): are temporal trends reflecting regulations? |
title_fullStr |
Legacy contaminants in the eastern Beaufort Sea beluga whales (Delphinapterus leucas): are temporal trends reflecting regulations? |
title_full_unstemmed |
Legacy contaminants in the eastern Beaufort Sea beluga whales (Delphinapterus leucas): are temporal trends reflecting regulations? |
title_sort |
legacy contaminants in the eastern beaufort sea beluga whales (delphinapterus leucas): are temporal trends reflecting regulations? |
publisher |
Canadian Science Publishing |
publishDate |
2018 |
url |
https://doi.org/10.1139/as-2017-0049 https://doaj.org/article/7672479dabd04a05a85afd846af3bedf |
geographic |
Arctic Northwest Territories |
geographic_facet |
Arctic Northwest Territories |
genre |
Arctic Arctic Beaufort Sea Beluga Beluga whale Beluga* Climate change Delphinapterus leucas Inuvialuit Northwest Territories Sea ice |
genre_facet |
Arctic Arctic Beaufort Sea Beluga Beluga whale Beluga* Climate change Delphinapterus leucas Inuvialuit Northwest Territories Sea ice |
op_source |
Arctic Science, Vol 4, Iss 3, Pp 373-387 (2018) |
op_relation |
https://doi.org/10.1139/as-2017-0049 https://doaj.org/toc/2368-7460 doi:10.1139/as-2017-0049 2368-7460 https://doaj.org/article/7672479dabd04a05a85afd846af3bedf |
op_doi |
https://doi.org/10.1139/as-2017-0049 |
container_title |
Arctic Science |
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1766296154199293952 |