Improved Environmental Status: 50 Years of Declining Fish Mercury Levels in Boreal and Subarctic Fennoscandia
Temporally (1965–2015) and spatially (55°–70°N) extensive records of total mercury (Hg) in freshwater fish showed consistent declines in boreal and subarctic Fennoscandia. The database contains 54 560 fish entries (n: pike > perch ≫ brown trout > roach ≈ Arctic charr) from 3132 lakes across Sw...
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Online Access: | https://hdl.handle.net/11250/2678241 https://doi.org/10.1021/acs.est.8b06399 |
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fthsinnlandet:oai:brage.inn.no:11250/2678241 2024-03-03T08:40:19+00:00 Improved Environmental Status: 50 Years of Declining Fish Mercury Levels in Boreal and Subarctic Fennoscandia Braaten, Hans Fredrik Veiteberg Åkerblom, Staffan Kahilainen, Kimmo Kalevi Rask, Martti Vuorenmaa, Jussi Mannio, Jaakko Malinen, Tommi Lydersen, Espen Poste, Amanda Amundsen, Per-Arne Kashulin, Nikolai Kashulina, Tatiana Terentjev, Petr Christensen, Guttorm de Wit, Heleen 2019 application/pdf https://hdl.handle.net/11250/2678241 https://doi.org/10.1021/acs.est.8b06399 eng eng Norges forskningsråd: 243644 Environmental Science and Technology. 2019, 53 (4), 1834-1843. urn:issn:0013-936X https://hdl.handle.net/11250/2678241 https://doi.org/10.1021/acs.est.8b06399 cristin:1666045 1834-1843 53 Environmental Science and Technology 4 atmospheric pollution climate Convention on Long-Range Transboundary Air Pollution freshwater Minamata Convention point source pollution VDP::Landbruks- og Fiskerifag: 900::Fiskerifag: 920 Peer reviewed Journal article 2019 fthsinnlandet https://doi.org/10.1021/acs.est.8b06399 2024-02-02T12:42:26Z Temporally (1965–2015) and spatially (55°–70°N) extensive records of total mercury (Hg) in freshwater fish showed consistent declines in boreal and subarctic Fennoscandia. The database contains 54 560 fish entries (n: pike > perch ≫ brown trout > roach ≈ Arctic charr) from 3132 lakes across Sweden, Finland, Norway, and Russian Murmansk area. 74% of the lakes did not meet the 0.5 ppm limit to protect human health. However, after 2000 only 25% of the lakes exceeded this level, indicating improved environmental status. In lakes where local pollution sources were identified, pike and perch Hg concentrations were significantly higher between 1965 and 1990 compared to values after 1995, likely an effect of implemented reduction measures. In lakes where Hg originated from long-range transboundary air pollution (LRTAP), consistent Hg declines (3–7‰ per year) were found for perch and pike in both boreal and subarctic Fennoscandia, suggesting common environmental controls. Hg in perch and pike in LRTAP lakes showed minimal declines with latitude, suggesting that drivers affected by temperature, such as growth dilution, counteracted Hg loading and food web exposure. We recommend that future fish Hg monitoring sampling design should include repeated sampling and collection of pollution history, water chemistry, fish age, and stable isotopes to enable evaluation of emission reduction policies. Improved Environmental Status: 50 Years of Declining Fish Mercury Levels in Boreal and Subarctic Fennoscandia acceptedVersion Article in Journal/Newspaper Arctic charr Arctic Fennoscandia Human health Subarctic Høgskolen i Innlandet: Brage INN Arctic Murmansk Norway Environmental Science & Technology 53 4 1834 1843 |
institution |
Open Polar |
collection |
Høgskolen i Innlandet: Brage INN |
op_collection_id |
fthsinnlandet |
language |
English |
topic |
atmospheric pollution climate Convention on Long-Range Transboundary Air Pollution freshwater Minamata Convention point source pollution VDP::Landbruks- og Fiskerifag: 900::Fiskerifag: 920 |
spellingShingle |
atmospheric pollution climate Convention on Long-Range Transboundary Air Pollution freshwater Minamata Convention point source pollution VDP::Landbruks- og Fiskerifag: 900::Fiskerifag: 920 Braaten, Hans Fredrik Veiteberg Åkerblom, Staffan Kahilainen, Kimmo Kalevi Rask, Martti Vuorenmaa, Jussi Mannio, Jaakko Malinen, Tommi Lydersen, Espen Poste, Amanda Amundsen, Per-Arne Kashulin, Nikolai Kashulina, Tatiana Terentjev, Petr Christensen, Guttorm de Wit, Heleen Improved Environmental Status: 50 Years of Declining Fish Mercury Levels in Boreal and Subarctic Fennoscandia |
topic_facet |
atmospheric pollution climate Convention on Long-Range Transboundary Air Pollution freshwater Minamata Convention point source pollution VDP::Landbruks- og Fiskerifag: 900::Fiskerifag: 920 |
description |
Temporally (1965–2015) and spatially (55°–70°N) extensive records of total mercury (Hg) in freshwater fish showed consistent declines in boreal and subarctic Fennoscandia. The database contains 54 560 fish entries (n: pike > perch ≫ brown trout > roach ≈ Arctic charr) from 3132 lakes across Sweden, Finland, Norway, and Russian Murmansk area. 74% of the lakes did not meet the 0.5 ppm limit to protect human health. However, after 2000 only 25% of the lakes exceeded this level, indicating improved environmental status. In lakes where local pollution sources were identified, pike and perch Hg concentrations were significantly higher between 1965 and 1990 compared to values after 1995, likely an effect of implemented reduction measures. In lakes where Hg originated from long-range transboundary air pollution (LRTAP), consistent Hg declines (3–7‰ per year) were found for perch and pike in both boreal and subarctic Fennoscandia, suggesting common environmental controls. Hg in perch and pike in LRTAP lakes showed minimal declines with latitude, suggesting that drivers affected by temperature, such as growth dilution, counteracted Hg loading and food web exposure. We recommend that future fish Hg monitoring sampling design should include repeated sampling and collection of pollution history, water chemistry, fish age, and stable isotopes to enable evaluation of emission reduction policies. Improved Environmental Status: 50 Years of Declining Fish Mercury Levels in Boreal and Subarctic Fennoscandia acceptedVersion |
format |
Article in Journal/Newspaper |
author |
Braaten, Hans Fredrik Veiteberg Åkerblom, Staffan Kahilainen, Kimmo Kalevi Rask, Martti Vuorenmaa, Jussi Mannio, Jaakko Malinen, Tommi Lydersen, Espen Poste, Amanda Amundsen, Per-Arne Kashulin, Nikolai Kashulina, Tatiana Terentjev, Petr Christensen, Guttorm de Wit, Heleen |
author_facet |
Braaten, Hans Fredrik Veiteberg Åkerblom, Staffan Kahilainen, Kimmo Kalevi Rask, Martti Vuorenmaa, Jussi Mannio, Jaakko Malinen, Tommi Lydersen, Espen Poste, Amanda Amundsen, Per-Arne Kashulin, Nikolai Kashulina, Tatiana Terentjev, Petr Christensen, Guttorm de Wit, Heleen |
author_sort |
Braaten, Hans Fredrik Veiteberg |
title |
Improved Environmental Status: 50 Years of Declining Fish Mercury Levels in Boreal and Subarctic Fennoscandia |
title_short |
Improved Environmental Status: 50 Years of Declining Fish Mercury Levels in Boreal and Subarctic Fennoscandia |
title_full |
Improved Environmental Status: 50 Years of Declining Fish Mercury Levels in Boreal and Subarctic Fennoscandia |
title_fullStr |
Improved Environmental Status: 50 Years of Declining Fish Mercury Levels in Boreal and Subarctic Fennoscandia |
title_full_unstemmed |
Improved Environmental Status: 50 Years of Declining Fish Mercury Levels in Boreal and Subarctic Fennoscandia |
title_sort |
improved environmental status: 50 years of declining fish mercury levels in boreal and subarctic fennoscandia |
publishDate |
2019 |
url |
https://hdl.handle.net/11250/2678241 https://doi.org/10.1021/acs.est.8b06399 |
geographic |
Arctic Murmansk Norway |
geographic_facet |
Arctic Murmansk Norway |
genre |
Arctic charr Arctic Fennoscandia Human health Subarctic |
genre_facet |
Arctic charr Arctic Fennoscandia Human health Subarctic |
op_source |
1834-1843 53 Environmental Science and Technology 4 |
op_relation |
Norges forskningsråd: 243644 Environmental Science and Technology. 2019, 53 (4), 1834-1843. urn:issn:0013-936X https://hdl.handle.net/11250/2678241 https://doi.org/10.1021/acs.est.8b06399 cristin:1666045 |
op_doi |
https://doi.org/10.1021/acs.est.8b06399 |
container_title |
Environmental Science & Technology |
container_volume |
53 |
container_issue |
4 |
container_start_page |
1834 |
op_container_end_page |
1843 |
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1792496040854683648 |