Declining Trends of Polychlorinated Naphthalenes in Seabird Eggs from the Canadian Arctic, 1975-2014
There are relatively few studies of polychlorinated naphthalenes (PCNs) for biota in polar regions and even fewer reports of temporal trends. We determined concentrations of PCNs in eggs of thick-billed murres (Uria lomvia) collected from the Canadian high Arctic between 1975 and 2014 and calculated...
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Online Access: | https://ir.library.carleton.ca/pub/14203 https://doi.org/10.1021/acs.est.7b00431 |
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ftcarletonunivir:oai:carleton.ca:14203 2023-05-15T14:51:41+02:00 Declining Trends of Polychlorinated Naphthalenes in Seabird Eggs from the Canadian Arctic, 1975-2014 Braune, B.M. (Birgit M.) Muir, D.C.G. (Derek C. G.) 2017-04-04 https://ir.library.carleton.ca/pub/14203 https://doi.org/10.1021/acs.est.7b00431 en eng https://ir.library.carleton.ca/pub/14203 doi:10.1021/acs.est.7b00431 Environmental Science and Technology vol. 51 no. 7, pp. 3802-3808 info:eu-repo/semantics/article 2017 ftcarletonunivir https://doi.org/10.1021/acs.est.7b00431 2022-02-06T21:51:55Z There are relatively few studies of polychlorinated naphthalenes (PCNs) for biota in polar regions and even fewer reports of temporal trends. We determined concentrations of PCNs in eggs of thick-billed murres (Uria lomvia) collected from the Canadian high Arctic between 1975 and 2014 and calculated their associated toxic equivalents (TEQs). Concentrations of Σ67PCN decreased significantly in the murre eggs between 1975 and 2014 at an average annual rate of -14.9 pg g-1 wet weight. Although the penta- and tetra-CNs (predominantly CN-52/60 and CN-42) dominated the PCN profile, the hexa-CNs (mainly CN-66/67) accounted for the majority of the Σ67TEQ-PCN, concentrations of which also decreased significantly between 1975 to 2014. On average, Σ67TEQ-PCN in the murre eggs accounted for only 1.9% of the total toxicity calculated for dioxin-like compounds measured in the murre eggs. As such, the TEQ-PCN concentrations calculated for the murre eggs in this study are several orders of magnitude lower than TEQ levels associated with reproductive effects in birds. This is the first published study of temporal trends of PCNs in Canadian Arctic biota. Article in Journal/Newspaper Arctic Uria lomvia uria Carleton University's Institutional Repository Arctic Environmental Science & Technology 51 7 3802 3808 |
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Carleton University's Institutional Repository |
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ftcarletonunivir |
language |
English |
description |
There are relatively few studies of polychlorinated naphthalenes (PCNs) for biota in polar regions and even fewer reports of temporal trends. We determined concentrations of PCNs in eggs of thick-billed murres (Uria lomvia) collected from the Canadian high Arctic between 1975 and 2014 and calculated their associated toxic equivalents (TEQs). Concentrations of Σ67PCN decreased significantly in the murre eggs between 1975 and 2014 at an average annual rate of -14.9 pg g-1 wet weight. Although the penta- and tetra-CNs (predominantly CN-52/60 and CN-42) dominated the PCN profile, the hexa-CNs (mainly CN-66/67) accounted for the majority of the Σ67TEQ-PCN, concentrations of which also decreased significantly between 1975 to 2014. On average, Σ67TEQ-PCN in the murre eggs accounted for only 1.9% of the total toxicity calculated for dioxin-like compounds measured in the murre eggs. As such, the TEQ-PCN concentrations calculated for the murre eggs in this study are several orders of magnitude lower than TEQ levels associated with reproductive effects in birds. This is the first published study of temporal trends of PCNs in Canadian Arctic biota. |
format |
Article in Journal/Newspaper |
author |
Braune, B.M. (Birgit M.) Muir, D.C.G. (Derek C. G.) |
spellingShingle |
Braune, B.M. (Birgit M.) Muir, D.C.G. (Derek C. G.) Declining Trends of Polychlorinated Naphthalenes in Seabird Eggs from the Canadian Arctic, 1975-2014 |
author_facet |
Braune, B.M. (Birgit M.) Muir, D.C.G. (Derek C. G.) |
author_sort |
Braune, B.M. (Birgit M.) |
title |
Declining Trends of Polychlorinated Naphthalenes in Seabird Eggs from the Canadian Arctic, 1975-2014 |
title_short |
Declining Trends of Polychlorinated Naphthalenes in Seabird Eggs from the Canadian Arctic, 1975-2014 |
title_full |
Declining Trends of Polychlorinated Naphthalenes in Seabird Eggs from the Canadian Arctic, 1975-2014 |
title_fullStr |
Declining Trends of Polychlorinated Naphthalenes in Seabird Eggs from the Canadian Arctic, 1975-2014 |
title_full_unstemmed |
Declining Trends of Polychlorinated Naphthalenes in Seabird Eggs from the Canadian Arctic, 1975-2014 |
title_sort |
declining trends of polychlorinated naphthalenes in seabird eggs from the canadian arctic, 1975-2014 |
publishDate |
2017 |
url |
https://ir.library.carleton.ca/pub/14203 https://doi.org/10.1021/acs.est.7b00431 |
geographic |
Arctic |
geographic_facet |
Arctic |
genre |
Arctic Uria lomvia uria |
genre_facet |
Arctic Uria lomvia uria |
op_source |
Environmental Science and Technology vol. 51 no. 7, pp. 3802-3808 |
op_relation |
https://ir.library.carleton.ca/pub/14203 doi:10.1021/acs.est.7b00431 |
op_doi |
https://doi.org/10.1021/acs.est.7b00431 |
container_title |
Environmental Science & Technology |
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51 |
container_issue |
7 |
container_start_page |
3802 |
op_container_end_page |
3808 |
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1766322801783865344 |