Seasonal trophic linkages in Arctic marine invertebrates assessed via fatty acids and compound‐specific stable isotopes
Abstract Climate change is having profound impacts on Arctic ecosystems with important implications for coastal productivity and food web dynamics. We investigated seasonal variations in resource use of 16 invertebrate taxa in lagoon ecosystems along the Alaska Beaufort Sea coast using a combination...
Published in: | Ecosphere |
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Online Access: | http://dx.doi.org/10.1002/ecs2.1429 https://api.wiley.com/onlinelibrary/tdm/v1/articles/10.1002%2Fecs2.1429 https://onlinelibrary.wiley.com/doi/pdf/10.1002/ecs2.1429 https://onlinelibrary.wiley.com/doi/full-xml/10.1002/ecs2.1429 http://api.wiley.com/onlinelibrary/chorus/v1/articles/10.1002%2Fecs2.1429 https://esajournals.onlinelibrary.wiley.com/doi/pdf/10.1002/ecs2.1429 |
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crwiley:10.1002/ecs2.1429 2024-09-15T17:58:49+00:00 Seasonal trophic linkages in Arctic marine invertebrates assessed via fatty acids and compound‐specific stable isotopes Mohan, Stephanie D. Connelly, Tara L. Harris, Carolynn M. Dunton, Kenneth H. McClelland, James W. National Science Foundation 2016 http://dx.doi.org/10.1002/ecs2.1429 https://api.wiley.com/onlinelibrary/tdm/v1/articles/10.1002%2Fecs2.1429 https://onlinelibrary.wiley.com/doi/pdf/10.1002/ecs2.1429 https://onlinelibrary.wiley.com/doi/full-xml/10.1002/ecs2.1429 http://api.wiley.com/onlinelibrary/chorus/v1/articles/10.1002%2Fecs2.1429 https://esajournals.onlinelibrary.wiley.com/doi/pdf/10.1002/ecs2.1429 en eng Wiley http://creativecommons.org/licenses/by/3.0/ http://creativecommons.org/licenses/by/3.0/ Ecosphere volume 7, issue 8 ISSN 2150-8925 2150-8925 journal-article 2016 crwiley https://doi.org/10.1002/ecs2.1429 2024-08-20T04:14:28Z Abstract Climate change is having profound impacts on Arctic ecosystems with important implications for coastal productivity and food web dynamics. We investigated seasonal variations in resource use of 16 invertebrate taxa in lagoon ecosystems along the Alaska Beaufort Sea coast using a combination of fatty acid (FA) biomarkers, bulk stable carbon isotope measurements of whole animals, and compound‐specific stable carbon isotope measurements of total lipid extracts and individual FAs. Invertebrates were collected during full‐ice cover (April), ice breakup (June), and open water (August) periods. Amphipods ( Onisimus glacialis ) had higher proportions of 18:2n‐6 and 18:3n‐3 FAs in April than in the other months. These elevated markers were accompanied by relatively low bulk and 18:2n‐6 δ 13 C values, indicating proportionally higher contributions from terrestrial/freshwater sources in April. A wider range of invertebrates examined during June and August showed increases in algae‐specific markers and higher proportions of essential FAs (e.g., 22:6n‐3 [docosahexaenoic acid] and 20:5n‐3 [eicosapentaenoic acid]) later in the summer. There were also marked differences in FA characteristics among invertebrates that highlighted differential feeding modes. For example, proportions of bacterial FAs were generally higher in deposit‐feeding invertebrates than in suspension feeders. These results highlight the current role of diverse carbon sources to Arctic coastal food webs, which may change with future warming. Article in Journal/Newspaper Beaufort Sea Climate change Alaska Wiley Online Library Ecosphere 7 8 |
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Wiley Online Library |
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crwiley |
language |
English |
description |
Abstract Climate change is having profound impacts on Arctic ecosystems with important implications for coastal productivity and food web dynamics. We investigated seasonal variations in resource use of 16 invertebrate taxa in lagoon ecosystems along the Alaska Beaufort Sea coast using a combination of fatty acid (FA) biomarkers, bulk stable carbon isotope measurements of whole animals, and compound‐specific stable carbon isotope measurements of total lipid extracts and individual FAs. Invertebrates were collected during full‐ice cover (April), ice breakup (June), and open water (August) periods. Amphipods ( Onisimus glacialis ) had higher proportions of 18:2n‐6 and 18:3n‐3 FAs in April than in the other months. These elevated markers were accompanied by relatively low bulk and 18:2n‐6 δ 13 C values, indicating proportionally higher contributions from terrestrial/freshwater sources in April. A wider range of invertebrates examined during June and August showed increases in algae‐specific markers and higher proportions of essential FAs (e.g., 22:6n‐3 [docosahexaenoic acid] and 20:5n‐3 [eicosapentaenoic acid]) later in the summer. There were also marked differences in FA characteristics among invertebrates that highlighted differential feeding modes. For example, proportions of bacterial FAs were generally higher in deposit‐feeding invertebrates than in suspension feeders. These results highlight the current role of diverse carbon sources to Arctic coastal food webs, which may change with future warming. |
author2 |
National Science Foundation |
format |
Article in Journal/Newspaper |
author |
Mohan, Stephanie D. Connelly, Tara L. Harris, Carolynn M. Dunton, Kenneth H. McClelland, James W. |
spellingShingle |
Mohan, Stephanie D. Connelly, Tara L. Harris, Carolynn M. Dunton, Kenneth H. McClelland, James W. Seasonal trophic linkages in Arctic marine invertebrates assessed via fatty acids and compound‐specific stable isotopes |
author_facet |
Mohan, Stephanie D. Connelly, Tara L. Harris, Carolynn M. Dunton, Kenneth H. McClelland, James W. |
author_sort |
Mohan, Stephanie D. |
title |
Seasonal trophic linkages in Arctic marine invertebrates assessed via fatty acids and compound‐specific stable isotopes |
title_short |
Seasonal trophic linkages in Arctic marine invertebrates assessed via fatty acids and compound‐specific stable isotopes |
title_full |
Seasonal trophic linkages in Arctic marine invertebrates assessed via fatty acids and compound‐specific stable isotopes |
title_fullStr |
Seasonal trophic linkages in Arctic marine invertebrates assessed via fatty acids and compound‐specific stable isotopes |
title_full_unstemmed |
Seasonal trophic linkages in Arctic marine invertebrates assessed via fatty acids and compound‐specific stable isotopes |
title_sort |
seasonal trophic linkages in arctic marine invertebrates assessed via fatty acids and compound‐specific stable isotopes |
publisher |
Wiley |
publishDate |
2016 |
url |
http://dx.doi.org/10.1002/ecs2.1429 https://api.wiley.com/onlinelibrary/tdm/v1/articles/10.1002%2Fecs2.1429 https://onlinelibrary.wiley.com/doi/pdf/10.1002/ecs2.1429 https://onlinelibrary.wiley.com/doi/full-xml/10.1002/ecs2.1429 http://api.wiley.com/onlinelibrary/chorus/v1/articles/10.1002%2Fecs2.1429 https://esajournals.onlinelibrary.wiley.com/doi/pdf/10.1002/ecs2.1429 |
genre |
Beaufort Sea Climate change Alaska |
genre_facet |
Beaufort Sea Climate change Alaska |
op_source |
Ecosphere volume 7, issue 8 ISSN 2150-8925 2150-8925 |
op_rights |
http://creativecommons.org/licenses/by/3.0/ http://creativecommons.org/licenses/by/3.0/ |
op_doi |
https://doi.org/10.1002/ecs2.1429 |
container_title |
Ecosphere |
container_volume |
7 |
container_issue |
8 |
_version_ |
1810435783131136000 |