Increased sea ice cover alters food web structure in East Antarctica
In recent years, sea ice cover along coasts of East Antarctica has tended to increase. To understand ecological implications of these environmental changes, we studied benthic food web structure on the coasts of Adélie Land during an event of unusually high sea ice cover (i.e. two successive austral...
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Springer Science and Business Media LLC
2019
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ftarchimer:oai:archimer.ifremer.fr:61194 2023-05-15T13:47:36+02:00 Increased sea ice cover alters food web structure in East Antarctica Michel, Loic Danis, Bruno Dubois, Philippe Eleaume, Marc Fournier, Jerome Gallut, Cyril Jane, Philip Lepoint, Gilles 2019-05 application/pdf https://archimer.ifremer.fr/doc/00500/61194/64726.pdf https://archimer.ifremer.fr/doc/00500/61194/64728.pdf https://archimer.ifremer.fr/doc/00500/61194/64729.mp4 https://doi.org/10.1038/s41598-019-44605-5 https://archimer.ifremer.fr/doc/00500/61194/ eng eng Springer Science and Business Media LLC https://archimer.ifremer.fr/doc/00500/61194/64726.pdf https://archimer.ifremer.fr/doc/00500/61194/64728.pdf https://archimer.ifremer.fr/doc/00500/61194/64729.mp4 doi:10.1038/s41598-019-44605-5 https://archimer.ifremer.fr/doc/00500/61194/ info:eu-repo/semantics/openAccess restricted use Scientific Reports (2045-2322) (Springer Science and Business Media LLC), 2019-05 , Vol. 9 , N. 1 , P. 8062 (11p.) text Publication info:eu-repo/semantics/article 2019 ftarchimer https://doi.org/10.1038/s41598-019-44605-5 2021-09-23T20:32:57Z In recent years, sea ice cover along coasts of East Antarctica has tended to increase. To understand ecological implications of these environmental changes, we studied benthic food web structure on the coasts of Adélie Land during an event of unusually high sea ice cover (i.e. two successive austral summers without seasonal breakup). We used integrative trophic markers (stable isotope ratios of carbon, nitrogen and sulfur) to build ecological models and explored feeding habits of macroinvertebrates. In total, 28 taxa spanning most present animal groups and functional guilds were investigated. Our results indicate that the absence of seasonal sea ice breakup deeply influenced benthic food webs. Sympagic algae dominated the diet of many key consumers, and the trophic levels of invertebrates were low, suggesting omnivore consumers did not rely much on predation and/or scavenging. Our results provide insights about how Antarctic benthic consumers, which typically live in an extremely stable environment, might adapt their feeding habits in response to sudden changes in environmental conditions and trophic resource availability. They also show that local and/or global trends of sea ice increase in Antarctica have the potential to cause drastic changes in food web structure, and therefore to impact benthic communities. Article in Journal/Newspaper Antarc* Antarctic Antarctica East Antarctica Sea ice Archimer (Archive Institutionnelle de l'Ifremer - Institut français de recherche pour l'exploitation de la mer) Antarctic Austral East Antarctica Scientific Reports 9 1 |
institution |
Open Polar |
collection |
Archimer (Archive Institutionnelle de l'Ifremer - Institut français de recherche pour l'exploitation de la mer) |
op_collection_id |
ftarchimer |
language |
English |
description |
In recent years, sea ice cover along coasts of East Antarctica has tended to increase. To understand ecological implications of these environmental changes, we studied benthic food web structure on the coasts of Adélie Land during an event of unusually high sea ice cover (i.e. two successive austral summers without seasonal breakup). We used integrative trophic markers (stable isotope ratios of carbon, nitrogen and sulfur) to build ecological models and explored feeding habits of macroinvertebrates. In total, 28 taxa spanning most present animal groups and functional guilds were investigated. Our results indicate that the absence of seasonal sea ice breakup deeply influenced benthic food webs. Sympagic algae dominated the diet of many key consumers, and the trophic levels of invertebrates were low, suggesting omnivore consumers did not rely much on predation and/or scavenging. Our results provide insights about how Antarctic benthic consumers, which typically live in an extremely stable environment, might adapt their feeding habits in response to sudden changes in environmental conditions and trophic resource availability. They also show that local and/or global trends of sea ice increase in Antarctica have the potential to cause drastic changes in food web structure, and therefore to impact benthic communities. |
format |
Article in Journal/Newspaper |
author |
Michel, Loic Danis, Bruno Dubois, Philippe Eleaume, Marc Fournier, Jerome Gallut, Cyril Jane, Philip Lepoint, Gilles |
spellingShingle |
Michel, Loic Danis, Bruno Dubois, Philippe Eleaume, Marc Fournier, Jerome Gallut, Cyril Jane, Philip Lepoint, Gilles Increased sea ice cover alters food web structure in East Antarctica |
author_facet |
Michel, Loic Danis, Bruno Dubois, Philippe Eleaume, Marc Fournier, Jerome Gallut, Cyril Jane, Philip Lepoint, Gilles |
author_sort |
Michel, Loic |
title |
Increased sea ice cover alters food web structure in East Antarctica |
title_short |
Increased sea ice cover alters food web structure in East Antarctica |
title_full |
Increased sea ice cover alters food web structure in East Antarctica |
title_fullStr |
Increased sea ice cover alters food web structure in East Antarctica |
title_full_unstemmed |
Increased sea ice cover alters food web structure in East Antarctica |
title_sort |
increased sea ice cover alters food web structure in east antarctica |
publisher |
Springer Science and Business Media LLC |
publishDate |
2019 |
url |
https://archimer.ifremer.fr/doc/00500/61194/64726.pdf https://archimer.ifremer.fr/doc/00500/61194/64728.pdf https://archimer.ifremer.fr/doc/00500/61194/64729.mp4 https://doi.org/10.1038/s41598-019-44605-5 https://archimer.ifremer.fr/doc/00500/61194/ |
geographic |
Antarctic Austral East Antarctica |
geographic_facet |
Antarctic Austral East Antarctica |
genre |
Antarc* Antarctic Antarctica East Antarctica Sea ice |
genre_facet |
Antarc* Antarctic Antarctica East Antarctica Sea ice |
op_source |
Scientific Reports (2045-2322) (Springer Science and Business Media LLC), 2019-05 , Vol. 9 , N. 1 , P. 8062 (11p.) |
op_relation |
https://archimer.ifremer.fr/doc/00500/61194/64726.pdf https://archimer.ifremer.fr/doc/00500/61194/64728.pdf https://archimer.ifremer.fr/doc/00500/61194/64729.mp4 doi:10.1038/s41598-019-44605-5 https://archimer.ifremer.fr/doc/00500/61194/ |
op_rights |
info:eu-repo/semantics/openAccess restricted use |
op_doi |
https://doi.org/10.1038/s41598-019-44605-5 |
container_title |
Scientific Reports |
container_volume |
9 |
container_issue |
1 |
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1766247511583883264 |