Changing environmental conditions have altered the feeding ecology of two keystone Arctic marine predators
Environmental change in the Arctic has impacted the composition and structure of marine food webs. Tracking feeding ecology changes of culturally-valued Arctic char (Salvelinus alpinus) and ringed seals (Pusa hispida) can provide an indication of the ecological significance of climate change in a vu...
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ftpubmed:oai:pubmedcentral.nih.gov:10462653 2023-10-01T03:53:09+02:00 Changing environmental conditions have altered the feeding ecology of two keystone Arctic marine predators Anderson, Matthew A. Fisk, Aaron T. Laing, Rodd Noël, Marie Angnatok, Joey Kirk, Jane Evans, Marlene Pijogge, Liz Brown, Tanya M. 2023-08-28 http://www.ncbi.nlm.nih.gov/pmc/articles/PMC10462653/ http://www.ncbi.nlm.nih.gov/pubmed/37640733 https://doi.org/10.1038/s41598-023-39091-9 en eng Nature Publishing Group UK http://www.ncbi.nlm.nih.gov/pmc/articles/PMC10462653/ http://www.ncbi.nlm.nih.gov/pubmed/37640733 http://dx.doi.org/10.1038/s41598-023-39091-9 © Springer Nature Limited 2023 https://creativecommons.org/licenses/by/4.0/Open Access This article is licensed under a Creative Commons Attribution 4.0 International License, which permits use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons licence, and indicate if changes were made. The images or other third party material in this article are included in the article's Creative Commons licence, unless indicated otherwise in a credit line to the material. If material is not included in the article's Creative Commons licence and your intended use is not permitted by statutory regulation or exceeds the permitted use, you will need to obtain permission directly from the copyright holder. To view a copy of this licence, visit http://creativecommons.org/licenses/by/4.0/ (https://creativecommons.org/licenses/by/4.0/) . Sci Rep Article Text 2023 ftpubmed https://doi.org/10.1038/s41598-023-39091-9 2023-09-03T01:15:53Z Environmental change in the Arctic has impacted the composition and structure of marine food webs. Tracking feeding ecology changes of culturally-valued Arctic char (Salvelinus alpinus) and ringed seals (Pusa hispida) can provide an indication of the ecological significance of climate change in a vulnerable region. We characterized how changes in sea ice conditions, sea surface temperature (SST), and primary productivity affected the feeding ecology of these two keystone species over a 13- and 18-year period, respectively, in northern Labrador, Canada. Arctic char fed consistently on pelagic resources (δ(13)C) but shifted over time to feeding at a higher trophic level (δ(15)N) and on more marine/offshore resources (δ(34)S), which correlated with decreases in chlorophyll a concentration. A reduction in Arctic char condition factor and lipid content was associated with higher trophic position. Ringed seals also shifted to feeding at a higher trophic level, but on more pelagic resources, which was associated with lower SST and higher chlorophyll a concentrations. Years with abnormally high SSTs and reduced sea ice concentrations resulted in large isotopic niche sizes for both species, suggesting abrupt change can result in more variable feeding. Changes in abundance and distribution of species long valued by the Inuit of Labrador could diminish food security. Text Arctic Climate change inuit Pusa hispida Salvelinus alpinus Sea ice PubMed Central (PMC) Arctic Canada Scientific Reports 13 1 |
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Article Anderson, Matthew A. Fisk, Aaron T. Laing, Rodd Noël, Marie Angnatok, Joey Kirk, Jane Evans, Marlene Pijogge, Liz Brown, Tanya M. Changing environmental conditions have altered the feeding ecology of two keystone Arctic marine predators |
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Article |
description |
Environmental change in the Arctic has impacted the composition and structure of marine food webs. Tracking feeding ecology changes of culturally-valued Arctic char (Salvelinus alpinus) and ringed seals (Pusa hispida) can provide an indication of the ecological significance of climate change in a vulnerable region. We characterized how changes in sea ice conditions, sea surface temperature (SST), and primary productivity affected the feeding ecology of these two keystone species over a 13- and 18-year period, respectively, in northern Labrador, Canada. Arctic char fed consistently on pelagic resources (δ(13)C) but shifted over time to feeding at a higher trophic level (δ(15)N) and on more marine/offshore resources (δ(34)S), which correlated with decreases in chlorophyll a concentration. A reduction in Arctic char condition factor and lipid content was associated with higher trophic position. Ringed seals also shifted to feeding at a higher trophic level, but on more pelagic resources, which was associated with lower SST and higher chlorophyll a concentrations. Years with abnormally high SSTs and reduced sea ice concentrations resulted in large isotopic niche sizes for both species, suggesting abrupt change can result in more variable feeding. Changes in abundance and distribution of species long valued by the Inuit of Labrador could diminish food security. |
format |
Text |
author |
Anderson, Matthew A. Fisk, Aaron T. Laing, Rodd Noël, Marie Angnatok, Joey Kirk, Jane Evans, Marlene Pijogge, Liz Brown, Tanya M. |
author_facet |
Anderson, Matthew A. Fisk, Aaron T. Laing, Rodd Noël, Marie Angnatok, Joey Kirk, Jane Evans, Marlene Pijogge, Liz Brown, Tanya M. |
author_sort |
Anderson, Matthew A. |
title |
Changing environmental conditions have altered the feeding ecology of two keystone Arctic marine predators |
title_short |
Changing environmental conditions have altered the feeding ecology of two keystone Arctic marine predators |
title_full |
Changing environmental conditions have altered the feeding ecology of two keystone Arctic marine predators |
title_fullStr |
Changing environmental conditions have altered the feeding ecology of two keystone Arctic marine predators |
title_full_unstemmed |
Changing environmental conditions have altered the feeding ecology of two keystone Arctic marine predators |
title_sort |
changing environmental conditions have altered the feeding ecology of two keystone arctic marine predators |
publisher |
Nature Publishing Group UK |
publishDate |
2023 |
url |
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC10462653/ http://www.ncbi.nlm.nih.gov/pubmed/37640733 https://doi.org/10.1038/s41598-023-39091-9 |
geographic |
Arctic Canada |
geographic_facet |
Arctic Canada |
genre |
Arctic Climate change inuit Pusa hispida Salvelinus alpinus Sea ice |
genre_facet |
Arctic Climate change inuit Pusa hispida Salvelinus alpinus Sea ice |
op_source |
Sci Rep |
op_relation |
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC10462653/ http://www.ncbi.nlm.nih.gov/pubmed/37640733 http://dx.doi.org/10.1038/s41598-023-39091-9 |
op_rights |
© Springer Nature Limited 2023 https://creativecommons.org/licenses/by/4.0/Open Access This article is licensed under a Creative Commons Attribution 4.0 International License, which permits use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons licence, and indicate if changes were made. The images or other third party material in this article are included in the article's Creative Commons licence, unless indicated otherwise in a credit line to the material. If material is not included in the article's Creative Commons licence and your intended use is not permitted by statutory regulation or exceeds the permitted use, you will need to obtain permission directly from the copyright holder. To view a copy of this licence, visit http://creativecommons.org/licenses/by/4.0/ (https://creativecommons.org/licenses/by/4.0/) . |
op_doi |
https://doi.org/10.1038/s41598-023-39091-9 |
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Scientific Reports |
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13 |
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1 |
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