Multi-decadal trends in biomarkers in harp seal teeth from the North Atlantic reveal the influence of prey availability on seal trophic position.
Arctic food webs are being impacted by borealisation and environmental change. To quantify the impact of these multiple forcings, it is crucial to accurately determine the temporal change in key ecosystem metrics, such as trophic position of top predators. Here, we measured stable nitrogen isotopes...
Published in: | Global Change Biology |
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Language: | English |
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Wiley
2023
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Online Access: | http://livrepository.liverpool.ac.uk/3171715/ https://doi.org/10.1111/gcb.16889 http://livrepository.liverpool.ac.uk/3171715/1/GCB_delavega_accepted_05072023.pdf |
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ftunivliverpool:oai:livrepository.liverpool.ac.uk:3171715 2023-08-27T04:07:55+02:00 Multi-decadal trends in biomarkers in harp seal teeth from the North Atlantic reveal the influence of prey availability on seal trophic position. de la Vega, Camille Kershaw, Joanna Stenson, Garry B Frie, Anne Kirstine Biuw, Martin Haug, Tore Norman, Louisa Mahaffey, Claire Smout, Sophie Jeffreys, Rachel M 2023-07 text http://livrepository.liverpool.ac.uk/3171715/ https://doi.org/10.1111/gcb.16889 http://livrepository.liverpool.ac.uk/3171715/1/GCB_delavega_accepted_05072023.pdf en eng eng Wiley http://livrepository.liverpool.ac.uk/3171715/1/GCB_delavega_accepted_05072023.pdf de la Vega, Camille orcid:0000-0002-7302-7306 , Kershaw, Joanna orcid:0000-0003-2244-3198 , Stenson, Garry B, Frie, Anne Kirstine, Biuw, Martin, Haug, Tore, Norman, Louisa, Mahaffey, Claire, Smout, Sophie and Jeffreys, Rachel M orcid:0000-0001-6114-2334 (2023) Multi-decadal trends in biomarkers in harp seal teeth from the North Atlantic reveal the influence of prey availability on seal trophic position. Global change biology. Article NonPeerReviewed 2023 ftunivliverpool https://doi.org/10.1111/gcb.16889 2023-08-03T22:28:05Z Arctic food webs are being impacted by borealisation and environmental change. To quantify the impact of these multiple forcings, it is crucial to accurately determine the temporal change in key ecosystem metrics, such as trophic position of top predators. Here, we measured stable nitrogen isotopes (δ 15 N) in amino acids in harp seal teeth from across the North Atlantic spanning a period of 60 years to robustly assess multi-decadal trends in harp seal trophic position, accounting for changes in δ 15 N at the base of the food web. We reveal long-term variations in trophic position of harp seals which are likely to reflect fluctuations in prey availability, specifically fish- or invertebrate-dominated diets. We show that the temporal trends in harp seal trophic position differ between the Northwest Atlantic, Greenland Sea and Barents Sea, suggesting divergent changes in each local ecosystem. Our results provide invaluable data for population dynamic and ecotoxicology studies. Article in Journal/Newspaper Arctic Barents Sea Greenland Greenland Sea Harp Seal North Atlantic Northwest Atlantic The University of Liverpool Repository Arctic Barents Sea Greenland Global Change Biology |
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The University of Liverpool Repository |
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ftunivliverpool |
language |
English |
description |
Arctic food webs are being impacted by borealisation and environmental change. To quantify the impact of these multiple forcings, it is crucial to accurately determine the temporal change in key ecosystem metrics, such as trophic position of top predators. Here, we measured stable nitrogen isotopes (δ 15 N) in amino acids in harp seal teeth from across the North Atlantic spanning a period of 60 years to robustly assess multi-decadal trends in harp seal trophic position, accounting for changes in δ 15 N at the base of the food web. We reveal long-term variations in trophic position of harp seals which are likely to reflect fluctuations in prey availability, specifically fish- or invertebrate-dominated diets. We show that the temporal trends in harp seal trophic position differ between the Northwest Atlantic, Greenland Sea and Barents Sea, suggesting divergent changes in each local ecosystem. Our results provide invaluable data for population dynamic and ecotoxicology studies. |
format |
Article in Journal/Newspaper |
author |
de la Vega, Camille Kershaw, Joanna Stenson, Garry B Frie, Anne Kirstine Biuw, Martin Haug, Tore Norman, Louisa Mahaffey, Claire Smout, Sophie Jeffreys, Rachel M |
spellingShingle |
de la Vega, Camille Kershaw, Joanna Stenson, Garry B Frie, Anne Kirstine Biuw, Martin Haug, Tore Norman, Louisa Mahaffey, Claire Smout, Sophie Jeffreys, Rachel M Multi-decadal trends in biomarkers in harp seal teeth from the North Atlantic reveal the influence of prey availability on seal trophic position. |
author_facet |
de la Vega, Camille Kershaw, Joanna Stenson, Garry B Frie, Anne Kirstine Biuw, Martin Haug, Tore Norman, Louisa Mahaffey, Claire Smout, Sophie Jeffreys, Rachel M |
author_sort |
de la Vega, Camille |
title |
Multi-decadal trends in biomarkers in harp seal teeth from the North Atlantic reveal the influence of prey availability on seal trophic position. |
title_short |
Multi-decadal trends in biomarkers in harp seal teeth from the North Atlantic reveal the influence of prey availability on seal trophic position. |
title_full |
Multi-decadal trends in biomarkers in harp seal teeth from the North Atlantic reveal the influence of prey availability on seal trophic position. |
title_fullStr |
Multi-decadal trends in biomarkers in harp seal teeth from the North Atlantic reveal the influence of prey availability on seal trophic position. |
title_full_unstemmed |
Multi-decadal trends in biomarkers in harp seal teeth from the North Atlantic reveal the influence of prey availability on seal trophic position. |
title_sort |
multi-decadal trends in biomarkers in harp seal teeth from the north atlantic reveal the influence of prey availability on seal trophic position. |
publisher |
Wiley |
publishDate |
2023 |
url |
http://livrepository.liverpool.ac.uk/3171715/ https://doi.org/10.1111/gcb.16889 http://livrepository.liverpool.ac.uk/3171715/1/GCB_delavega_accepted_05072023.pdf |
geographic |
Arctic Barents Sea Greenland |
geographic_facet |
Arctic Barents Sea Greenland |
genre |
Arctic Barents Sea Greenland Greenland Sea Harp Seal North Atlantic Northwest Atlantic |
genre_facet |
Arctic Barents Sea Greenland Greenland Sea Harp Seal North Atlantic Northwest Atlantic |
op_relation |
http://livrepository.liverpool.ac.uk/3171715/1/GCB_delavega_accepted_05072023.pdf de la Vega, Camille orcid:0000-0002-7302-7306 , Kershaw, Joanna orcid:0000-0003-2244-3198 , Stenson, Garry B, Frie, Anne Kirstine, Biuw, Martin, Haug, Tore, Norman, Louisa, Mahaffey, Claire, Smout, Sophie and Jeffreys, Rachel M orcid:0000-0001-6114-2334 (2023) Multi-decadal trends in biomarkers in harp seal teeth from the North Atlantic reveal the influence of prey availability on seal trophic position. Global change biology. |
op_doi |
https://doi.org/10.1111/gcb.16889 |
container_title |
Global Change Biology |
_version_ |
1775348633023021056 |