Bioaccumulation and Biomagnification of Perfluoroalkyl Substances (PFAS) in a Subarctic Ringed Seal Food Web in Lake Melville, Northern Labrador, Canada
A study was carried out on the distribution, bioaccumulation, and biomagnification of perfluoroalkyl substances (PFAS) in water and ringed seal food web of Lake Melville. The results indicate that short-chain PFAS such as perfluorobutanoic acid (PFBA) predominates in Lake Melville water. Concentrati...
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University of Toronto
2021
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ftunivtoronto:oai:tspace.library.utoronto.ca:1807/108611 2023-05-15T17:06:08+02:00 Bioaccumulation and Biomagnification of Perfluoroalkyl Substances (PFAS) in a Subarctic Ringed Seal Food Web in Lake Melville, Northern Labrador, Canada Xiong, Dingyi Lehnherr, Igor Geography 2021-11-30T16:16:14Z application/pdf http://hdl.handle.net/1807/108611 unknown University of Toronto http://hdl.handle.net/1807/108611 0366 Thesis 2021 ftunivtoronto 2021-12-05T18:17:08Z A study was carried out on the distribution, bioaccumulation, and biomagnification of perfluoroalkyl substances (PFAS) in water and ringed seal food web of Lake Melville. The results indicate that short-chain PFAS such as perfluorobutanoic acid (PFBA) predominates in Lake Melville water. Concentrations of other PFAS are diluted by seawater intrusion from Labrador Sea along the freshwater-marine gradient of this estuary, with freshwater flowing seaward atop of seawater flowing landward. PFBA predominates in freshwater zooplankton, whereas perfluorooctane sulfonate (PFOS) predominates in marine zooplankton, and PFOS bioaccumulates in both freshwater and marine zooplankton. The results also indicate that perfluoroundecanoic acid (PFUnDA) predominates in fish livers and PFOS and perfluorononanoic acid (PFNA) predominate in ringed seal livers. Trophic magnification factor values > 1 (range from 1.66 to 7.44 log ng/ g w.w.) showed that long-chain PFCA, PFHxS, and PFOS biomagnify throughout ringed seal food web. M.Sc. Thesis Labrador Sea ringed seal Subarctic University of Toronto: Research Repository T-Space Canada Lake Melville ENVELOPE(-59.557,-59.557,53.728,53.728) |
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University of Toronto: Research Repository T-Space |
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0366 |
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0366 Xiong, Dingyi Bioaccumulation and Biomagnification of Perfluoroalkyl Substances (PFAS) in a Subarctic Ringed Seal Food Web in Lake Melville, Northern Labrador, Canada |
topic_facet |
0366 |
description |
A study was carried out on the distribution, bioaccumulation, and biomagnification of perfluoroalkyl substances (PFAS) in water and ringed seal food web of Lake Melville. The results indicate that short-chain PFAS such as perfluorobutanoic acid (PFBA) predominates in Lake Melville water. Concentrations of other PFAS are diluted by seawater intrusion from Labrador Sea along the freshwater-marine gradient of this estuary, with freshwater flowing seaward atop of seawater flowing landward. PFBA predominates in freshwater zooplankton, whereas perfluorooctane sulfonate (PFOS) predominates in marine zooplankton, and PFOS bioaccumulates in both freshwater and marine zooplankton. The results also indicate that perfluoroundecanoic acid (PFUnDA) predominates in fish livers and PFOS and perfluorononanoic acid (PFNA) predominate in ringed seal livers. Trophic magnification factor values > 1 (range from 1.66 to 7.44 log ng/ g w.w.) showed that long-chain PFCA, PFHxS, and PFOS biomagnify throughout ringed seal food web. M.Sc. |
author2 |
Lehnherr, Igor Geography |
format |
Thesis |
author |
Xiong, Dingyi |
author_facet |
Xiong, Dingyi |
author_sort |
Xiong, Dingyi |
title |
Bioaccumulation and Biomagnification of Perfluoroalkyl Substances (PFAS) in a Subarctic Ringed Seal Food Web in Lake Melville, Northern Labrador, Canada |
title_short |
Bioaccumulation and Biomagnification of Perfluoroalkyl Substances (PFAS) in a Subarctic Ringed Seal Food Web in Lake Melville, Northern Labrador, Canada |
title_full |
Bioaccumulation and Biomagnification of Perfluoroalkyl Substances (PFAS) in a Subarctic Ringed Seal Food Web in Lake Melville, Northern Labrador, Canada |
title_fullStr |
Bioaccumulation and Biomagnification of Perfluoroalkyl Substances (PFAS) in a Subarctic Ringed Seal Food Web in Lake Melville, Northern Labrador, Canada |
title_full_unstemmed |
Bioaccumulation and Biomagnification of Perfluoroalkyl Substances (PFAS) in a Subarctic Ringed Seal Food Web in Lake Melville, Northern Labrador, Canada |
title_sort |
bioaccumulation and biomagnification of perfluoroalkyl substances (pfas) in a subarctic ringed seal food web in lake melville, northern labrador, canada |
publisher |
University of Toronto |
publishDate |
2021 |
url |
http://hdl.handle.net/1807/108611 |
long_lat |
ENVELOPE(-59.557,-59.557,53.728,53.728) |
geographic |
Canada Lake Melville |
geographic_facet |
Canada Lake Melville |
genre |
Labrador Sea ringed seal Subarctic |
genre_facet |
Labrador Sea ringed seal Subarctic |
op_relation |
http://hdl.handle.net/1807/108611 |
_version_ |
1766061145173524480 |