Spatial distribution of mercury in seawater, sediment, and seafood from the Hardangerfjord ecosystem, Norway
Hardangerfjord is one of the longest fjords in the world and has historical mercury (Hg) contamination from a zinc plant in its inner sector. In order to investigate the extent of Hg transferred to abiotic and biotic ecosystem compartments, Hg and monomethylmercury (MeHg) concentrations were measure...
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ftimr:oai:imr.brage.unit.no:11250/2637265 2024-09-15T18:05:17+00:00 Spatial distribution of mercury in seawater, sediment, and seafood from the Hardangerfjord ecosystem, Norway Mahjour Azad, Atabak Frantzen, Sylvia Bank, Michael Johnsen, Ingrid Askeland Tessier, Emmanuel Amouroux, David Madsen, Lise Måge, Amund 2019 application/pdf http://hdl.handle.net/11250/2637265 https://doi.org/10.1016/j.scitotenv.2019.02.352 eng eng Science of the Total Environment. 2019, 667 622-637. urn:issn:0048-9697 http://hdl.handle.net/11250/2637265 https://doi.org/10.1016/j.scitotenv.2019.02.352 cristin:1703411 622-637 667 Science of the Total Environment Journal article Peer reviewed 2019 ftimr https://doi.org/10.1016/j.scitotenv.2019.02.352 2024-07-31T03:37:25Z Hardangerfjord is one of the longest fjords in the world and has historical mercury (Hg) contamination from a zinc plant in its inner sector. In order to investigate the extent of Hg transferred to abiotic and biotic ecosystem compartments, Hg and monomethylmercury (MeHg) concentrations were measured in seawater, sediment, and seafood commonly consumed by humans. Although total mercury in seawater has been described previously, this investigation reports novel MeHg data for seawater from Norwegian fjords. Total Hg and MeHg concentrations in seawater, sediment, and biota increased towards the point source of pollution (PSP) and multiple lines of evidence show a clear PSP effect in seawater and sediment concentrations. In fish, however, similar high concentrations were found in the inner part of another branch adjacent to the PSP. We postulate that, in addition to PSP, atmospheric Hg, terrestrial run-off and hydroelectric power stations are also important sources of Hg in this fjord ecosystem. Hg contamination gradually increased towards the inner part of the fjord for most fish species and crustaceans. Since the PSP and the atmospheric Hg pools were greater towards the inner part of the fjord, it is not entirely possible to discriminate the full extent of the PSP and the atmospheric Hg contribution to the fjord food web. The European Union (EU) Hg maximum level for consumption was exceeded in demersal fish species including tusk (Brosme brosme), blue ling (Molva dypterygia) and common ling (Molva molva) from the inner fjord (1.08 to 1.89 mg kg−1 ww) and from the outer fjord (0.49 to 1.07 mg kg−1 ww). Crustaceans were less contaminated and only European lobster (Homarus gammarus) from inner fjord exceeded the EU limit (0.62 mg kg−1 ww). Selenium (Se) concentrations were also measured in seafood species and Se-Hg co-exposure dynamics are also discussed. publishedVersion Article in Journal/Newspaper European lobster Homarus gammarus Molva dypterygia Institute for Marine Research: Brage IMR Science of The Total Environment 667 622 637 |
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Open Polar |
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Institute for Marine Research: Brage IMR |
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ftimr |
language |
English |
description |
Hardangerfjord is one of the longest fjords in the world and has historical mercury (Hg) contamination from a zinc plant in its inner sector. In order to investigate the extent of Hg transferred to abiotic and biotic ecosystem compartments, Hg and monomethylmercury (MeHg) concentrations were measured in seawater, sediment, and seafood commonly consumed by humans. Although total mercury in seawater has been described previously, this investigation reports novel MeHg data for seawater from Norwegian fjords. Total Hg and MeHg concentrations in seawater, sediment, and biota increased towards the point source of pollution (PSP) and multiple lines of evidence show a clear PSP effect in seawater and sediment concentrations. In fish, however, similar high concentrations were found in the inner part of another branch adjacent to the PSP. We postulate that, in addition to PSP, atmospheric Hg, terrestrial run-off and hydroelectric power stations are also important sources of Hg in this fjord ecosystem. Hg contamination gradually increased towards the inner part of the fjord for most fish species and crustaceans. Since the PSP and the atmospheric Hg pools were greater towards the inner part of the fjord, it is not entirely possible to discriminate the full extent of the PSP and the atmospheric Hg contribution to the fjord food web. The European Union (EU) Hg maximum level for consumption was exceeded in demersal fish species including tusk (Brosme brosme), blue ling (Molva dypterygia) and common ling (Molva molva) from the inner fjord (1.08 to 1.89 mg kg−1 ww) and from the outer fjord (0.49 to 1.07 mg kg−1 ww). Crustaceans were less contaminated and only European lobster (Homarus gammarus) from inner fjord exceeded the EU limit (0.62 mg kg−1 ww). Selenium (Se) concentrations were also measured in seafood species and Se-Hg co-exposure dynamics are also discussed. publishedVersion |
format |
Article in Journal/Newspaper |
author |
Mahjour Azad, Atabak Frantzen, Sylvia Bank, Michael Johnsen, Ingrid Askeland Tessier, Emmanuel Amouroux, David Madsen, Lise Måge, Amund |
spellingShingle |
Mahjour Azad, Atabak Frantzen, Sylvia Bank, Michael Johnsen, Ingrid Askeland Tessier, Emmanuel Amouroux, David Madsen, Lise Måge, Amund Spatial distribution of mercury in seawater, sediment, and seafood from the Hardangerfjord ecosystem, Norway |
author_facet |
Mahjour Azad, Atabak Frantzen, Sylvia Bank, Michael Johnsen, Ingrid Askeland Tessier, Emmanuel Amouroux, David Madsen, Lise Måge, Amund |
author_sort |
Mahjour Azad, Atabak |
title |
Spatial distribution of mercury in seawater, sediment, and seafood from the Hardangerfjord ecosystem, Norway |
title_short |
Spatial distribution of mercury in seawater, sediment, and seafood from the Hardangerfjord ecosystem, Norway |
title_full |
Spatial distribution of mercury in seawater, sediment, and seafood from the Hardangerfjord ecosystem, Norway |
title_fullStr |
Spatial distribution of mercury in seawater, sediment, and seafood from the Hardangerfjord ecosystem, Norway |
title_full_unstemmed |
Spatial distribution of mercury in seawater, sediment, and seafood from the Hardangerfjord ecosystem, Norway |
title_sort |
spatial distribution of mercury in seawater, sediment, and seafood from the hardangerfjord ecosystem, norway |
publishDate |
2019 |
url |
http://hdl.handle.net/11250/2637265 https://doi.org/10.1016/j.scitotenv.2019.02.352 |
genre |
European lobster Homarus gammarus Molva dypterygia |
genre_facet |
European lobster Homarus gammarus Molva dypterygia |
op_source |
622-637 667 Science of the Total Environment |
op_relation |
Science of the Total Environment. 2019, 667 622-637. urn:issn:0048-9697 http://hdl.handle.net/11250/2637265 https://doi.org/10.1016/j.scitotenv.2019.02.352 cristin:1703411 |
op_doi |
https://doi.org/10.1016/j.scitotenv.2019.02.352 |
container_title |
Science of The Total Environment |
container_volume |
667 |
container_start_page |
622 |
op_container_end_page |
637 |
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1810442866265161728 |