Multi-decadal environmental change in the Barents Sea recorded by seal teeth
Multiple environmental forcings, such as warming and changes in ocean circulation and nutrient supply, are affecting the base of Arctic marine ecosystems, with cascading effects on the entire food web through bottom-up control. Stable nitrogen isotopes (δ15N) can be used to detect and unravel the im...
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Online Access: | https://hdl.handle.net/11250/3011607 https://doi.org/10.1111/gcb.16138 |
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ftimr:oai:imr.brage.unit.no:11250/3011607 2023-05-15T14:46:37+02:00 Multi-decadal environmental change in the Barents Sea recorded by seal teeth de la Vega, Camille Buchanan, Pearse J. Tagliabue, Alessandro Hopkins, Joanne E. Jeffreys, Rachel M. Frie, Anne Kirstine Højholt Biuw, Martin Kershaw, Joanna Grecian, James Norman, Louisa Smout, Sophie Haug, Tore Mahaffey, Claire 2022 application/pdf https://hdl.handle.net/11250/3011607 https://doi.org/10.1111/gcb.16138 eng eng Global Change Biology. 2022, 28 (9), 3054-3065. urn:issn:1354-1013 https://hdl.handle.net/11250/3011607 https://doi.org/10.1111/gcb.16138 cristin:2027219 3054-3065 28 Global Change Biology 9 Peer reviewed Journal article 2022 ftimr https://doi.org/10.1111/gcb.16138 2022-08-17T22:41:35Z Multiple environmental forcings, such as warming and changes in ocean circulation and nutrient supply, are affecting the base of Arctic marine ecosystems, with cascading effects on the entire food web through bottom-up control. Stable nitrogen isotopes (δ15N) can be used to detect and unravel the impact of these forcings on this unique ecosystem, if the many processes that affect the δ15N values are constrained. Combining unique 60-year records from compound specific δ15N biomarkers on harp seal teeth alongside state-of-the-art ocean modelling, we observed a significant decline in the δ15N values at the base of the Barents Sea food web from 1951 to 2012. This strong and persistent decadal trend emerges due to the combination of anthropogenic atmospheric nitrogen deposition in the Atlantic, increased northward transport of Atlantic water through Arctic gateways and local feedbacks from increasing Arctic primary production. Our results suggest that the Arctic ecosystem has been responding to anthropogenically induced local and remote drivers, linked to changing ocean biology, chemistry and physics, for at least 60 years. Accounting for these trends in δ15N values at the base of the food web is essential to accurately detect ecosystem restructuring in this rapidly changing environment. publishedVersion Article in Journal/Newspaper Arctic Barents Sea Harp Seal Institute for Marine Research: Brage IMR Arctic Barents Sea Global Change Biology 28 9 3054 3065 |
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Open Polar |
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Institute for Marine Research: Brage IMR |
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ftimr |
language |
English |
description |
Multiple environmental forcings, such as warming and changes in ocean circulation and nutrient supply, are affecting the base of Arctic marine ecosystems, with cascading effects on the entire food web through bottom-up control. Stable nitrogen isotopes (δ15N) can be used to detect and unravel the impact of these forcings on this unique ecosystem, if the many processes that affect the δ15N values are constrained. Combining unique 60-year records from compound specific δ15N biomarkers on harp seal teeth alongside state-of-the-art ocean modelling, we observed a significant decline in the δ15N values at the base of the Barents Sea food web from 1951 to 2012. This strong and persistent decadal trend emerges due to the combination of anthropogenic atmospheric nitrogen deposition in the Atlantic, increased northward transport of Atlantic water through Arctic gateways and local feedbacks from increasing Arctic primary production. Our results suggest that the Arctic ecosystem has been responding to anthropogenically induced local and remote drivers, linked to changing ocean biology, chemistry and physics, for at least 60 years. Accounting for these trends in δ15N values at the base of the food web is essential to accurately detect ecosystem restructuring in this rapidly changing environment. publishedVersion |
format |
Article in Journal/Newspaper |
author |
de la Vega, Camille Buchanan, Pearse J. Tagliabue, Alessandro Hopkins, Joanne E. Jeffreys, Rachel M. Frie, Anne Kirstine Højholt Biuw, Martin Kershaw, Joanna Grecian, James Norman, Louisa Smout, Sophie Haug, Tore Mahaffey, Claire |
spellingShingle |
de la Vega, Camille Buchanan, Pearse J. Tagliabue, Alessandro Hopkins, Joanne E. Jeffreys, Rachel M. Frie, Anne Kirstine Højholt Biuw, Martin Kershaw, Joanna Grecian, James Norman, Louisa Smout, Sophie Haug, Tore Mahaffey, Claire Multi-decadal environmental change in the Barents Sea recorded by seal teeth |
author_facet |
de la Vega, Camille Buchanan, Pearse J. Tagliabue, Alessandro Hopkins, Joanne E. Jeffreys, Rachel M. Frie, Anne Kirstine Højholt Biuw, Martin Kershaw, Joanna Grecian, James Norman, Louisa Smout, Sophie Haug, Tore Mahaffey, Claire |
author_sort |
de la Vega, Camille |
title |
Multi-decadal environmental change in the Barents Sea recorded by seal teeth |
title_short |
Multi-decadal environmental change in the Barents Sea recorded by seal teeth |
title_full |
Multi-decadal environmental change in the Barents Sea recorded by seal teeth |
title_fullStr |
Multi-decadal environmental change in the Barents Sea recorded by seal teeth |
title_full_unstemmed |
Multi-decadal environmental change in the Barents Sea recorded by seal teeth |
title_sort |
multi-decadal environmental change in the barents sea recorded by seal teeth |
publishDate |
2022 |
url |
https://hdl.handle.net/11250/3011607 https://doi.org/10.1111/gcb.16138 |
geographic |
Arctic Barents Sea |
geographic_facet |
Arctic Barents Sea |
genre |
Arctic Barents Sea Harp Seal |
genre_facet |
Arctic Barents Sea Harp Seal |
op_source |
3054-3065 28 Global Change Biology 9 |
op_relation |
Global Change Biology. 2022, 28 (9), 3054-3065. urn:issn:1354-1013 https://hdl.handle.net/11250/3011607 https://doi.org/10.1111/gcb.16138 cristin:2027219 |
op_doi |
https://doi.org/10.1111/gcb.16138 |
container_title |
Global Change Biology |
container_volume |
28 |
container_issue |
9 |
container_start_page |
3054 |
op_container_end_page |
3065 |
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1766317822683643904 |