Current-use pesticides in seawater and their bioaccumulation in polar bear–ringed seal food chains of the Canadian Arctic
The distribution of current-use pesticides (CUPs) in seawater and their trophodynamics were investigated in 3 Canadian Arctic marine food chains. The greatest ranges of dissolved-phase concentrations in seawater for each CUP were endosulfan sulfate (less than method detection limit (MDL) to 19 pg L−...
Published in: | Environmental Toxicology and Chemistry |
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Online Access: | https://scholar.uwindsor.ca/glierpub/341 https://doi.org/10.1002/etc.3427 |
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ftunivwindsor:oai:scholar.uwindsor.ca:glierpub-1343 2023-06-11T04:09:13+02:00 Current-use pesticides in seawater and their bioaccumulation in polar bear–ringed seal food chains of the Canadian Arctic Morris, Adam D. Muir, Derek C.G. Solomon, Keith R. Letcher, Robert J. McKinney, Melissa A. Fisk, Aaron T. McMeans, Bailey C. Tomy, Gregg T. Teixeira, Camilla Wang, Xiaowa Duric, Mark 2016-07-01T07:00:00Z https://scholar.uwindsor.ca/glierpub/341 https://doi.org/10.1002/etc.3427 unknown Scholarship at UWindsor https://scholar.uwindsor.ca/glierpub/341 doi:10.1002/etc.3427 https://doi.org/10.1002/etc.3427 Great Lakes Institute for Environmental Research Publications Bioaccumulation Current-use pesticide Food chain Marine mammal Trophic dilution text 2016 ftunivwindsor https://doi.org/10.1002/etc.3427 2023-05-06T19:10:50Z The distribution of current-use pesticides (CUPs) in seawater and their trophodynamics were investigated in 3 Canadian Arctic marine food chains. The greatest ranges of dissolved-phase concentrations in seawater for each CUP were endosulfan sulfate (less than method detection limit (MDL) to 19 pg L−1) > dacthal (0.76–15 pg L−1) > chlorpyrifos (less than MDL to 8.1 pg L−1) > pentachloronitrobenzene (less than MDL to 2.6 pg L−1) > α-endosulfan (0.20–2.3 pg L−1). Bioaccumulation factors (BAFs, water-respiring organisms) were greatest in plankton, including chlorothalonil (log BAF = 7.4 ± 7.1 L kg−1, mean ± standard error), chlorpyrifos (log BAF = 6.9 ± 6.7 L kg−1), and α-endosulfan (log BAF = 6.5 ± 6.0 L kg−1). The largest biomagnification factors (BMFs) were found for dacthal in the capelin:plankton trophic relationship (BMF = 13 ± 5.0) at Cumberland Sound (Nunvavut), and for β-endosulfan (BMF = 16 ± 4.9) and α-endosulfan (BMF = 9.3 ± 2.8) in the polar bear—ringed seal relationship at Barrow and Rae Strait (NU), respectively. Concentrations of endosulfan sulfate exhibited trophic magnification (increasing concentrations with increasing trophic level) in the poikilothermic portion of the food web (trophic magnification factor = 1.4), but all of the CUPs underwent trophic dilution in the marine mammal food web, despite some trophic level–specific biomagnification. Together, these observations are most likely indicative of metabolism of these CUPs in mammals. Environ Toxicol Chem 2016;35:1695–1707. © 2016 SETAC. Text Arctic Cumberland Sound ringed seal University of Windsor, Ontario: Scholarship at UWindsor Arctic Cumberland Sound ENVELOPE(-66.014,-66.014,65.334,65.334) Rae Strait ENVELOPE(-94.926,-94.926,68.843,68.843) Rae ENVELOPE(-116.053,-116.053,62.834,62.834) Environmental Toxicology and Chemistry 35 7 1695 1707 |
institution |
Open Polar |
collection |
University of Windsor, Ontario: Scholarship at UWindsor |
op_collection_id |
ftunivwindsor |
language |
unknown |
topic |
Bioaccumulation Current-use pesticide Food chain Marine mammal Trophic dilution |
spellingShingle |
Bioaccumulation Current-use pesticide Food chain Marine mammal Trophic dilution Morris, Adam D. Muir, Derek C.G. Solomon, Keith R. Letcher, Robert J. McKinney, Melissa A. Fisk, Aaron T. McMeans, Bailey C. Tomy, Gregg T. Teixeira, Camilla Wang, Xiaowa Duric, Mark Current-use pesticides in seawater and their bioaccumulation in polar bear–ringed seal food chains of the Canadian Arctic |
topic_facet |
Bioaccumulation Current-use pesticide Food chain Marine mammal Trophic dilution |
description |
The distribution of current-use pesticides (CUPs) in seawater and their trophodynamics were investigated in 3 Canadian Arctic marine food chains. The greatest ranges of dissolved-phase concentrations in seawater for each CUP were endosulfan sulfate (less than method detection limit (MDL) to 19 pg L−1) > dacthal (0.76–15 pg L−1) > chlorpyrifos (less than MDL to 8.1 pg L−1) > pentachloronitrobenzene (less than MDL to 2.6 pg L−1) > α-endosulfan (0.20–2.3 pg L−1). Bioaccumulation factors (BAFs, water-respiring organisms) were greatest in plankton, including chlorothalonil (log BAF = 7.4 ± 7.1 L kg−1, mean ± standard error), chlorpyrifos (log BAF = 6.9 ± 6.7 L kg−1), and α-endosulfan (log BAF = 6.5 ± 6.0 L kg−1). The largest biomagnification factors (BMFs) were found for dacthal in the capelin:plankton trophic relationship (BMF = 13 ± 5.0) at Cumberland Sound (Nunvavut), and for β-endosulfan (BMF = 16 ± 4.9) and α-endosulfan (BMF = 9.3 ± 2.8) in the polar bear—ringed seal relationship at Barrow and Rae Strait (NU), respectively. Concentrations of endosulfan sulfate exhibited trophic magnification (increasing concentrations with increasing trophic level) in the poikilothermic portion of the food web (trophic magnification factor = 1.4), but all of the CUPs underwent trophic dilution in the marine mammal food web, despite some trophic level–specific biomagnification. Together, these observations are most likely indicative of metabolism of these CUPs in mammals. Environ Toxicol Chem 2016;35:1695–1707. © 2016 SETAC. |
format |
Text |
author |
Morris, Adam D. Muir, Derek C.G. Solomon, Keith R. Letcher, Robert J. McKinney, Melissa A. Fisk, Aaron T. McMeans, Bailey C. Tomy, Gregg T. Teixeira, Camilla Wang, Xiaowa Duric, Mark |
author_facet |
Morris, Adam D. Muir, Derek C.G. Solomon, Keith R. Letcher, Robert J. McKinney, Melissa A. Fisk, Aaron T. McMeans, Bailey C. Tomy, Gregg T. Teixeira, Camilla Wang, Xiaowa Duric, Mark |
author_sort |
Morris, Adam D. |
title |
Current-use pesticides in seawater and their bioaccumulation in polar bear–ringed seal food chains of the Canadian Arctic |
title_short |
Current-use pesticides in seawater and their bioaccumulation in polar bear–ringed seal food chains of the Canadian Arctic |
title_full |
Current-use pesticides in seawater and their bioaccumulation in polar bear–ringed seal food chains of the Canadian Arctic |
title_fullStr |
Current-use pesticides in seawater and their bioaccumulation in polar bear–ringed seal food chains of the Canadian Arctic |
title_full_unstemmed |
Current-use pesticides in seawater and their bioaccumulation in polar bear–ringed seal food chains of the Canadian Arctic |
title_sort |
current-use pesticides in seawater and their bioaccumulation in polar bear–ringed seal food chains of the canadian arctic |
publisher |
Scholarship at UWindsor |
publishDate |
2016 |
url |
https://scholar.uwindsor.ca/glierpub/341 https://doi.org/10.1002/etc.3427 |
long_lat |
ENVELOPE(-66.014,-66.014,65.334,65.334) ENVELOPE(-94.926,-94.926,68.843,68.843) ENVELOPE(-116.053,-116.053,62.834,62.834) |
geographic |
Arctic Cumberland Sound Rae Strait Rae |
geographic_facet |
Arctic Cumberland Sound Rae Strait Rae |
genre |
Arctic Cumberland Sound ringed seal |
genre_facet |
Arctic Cumberland Sound ringed seal |
op_source |
Great Lakes Institute for Environmental Research Publications |
op_relation |
https://scholar.uwindsor.ca/glierpub/341 doi:10.1002/etc.3427 https://doi.org/10.1002/etc.3427 |
op_doi |
https://doi.org/10.1002/etc.3427 |
container_title |
Environmental Toxicology and Chemistry |
container_volume |
35 |
container_issue |
7 |
container_start_page |
1695 |
op_container_end_page |
1707 |
_version_ |
1768382981914755072 |