Response of nematode communities after large-scale ice-shelf collapse events in the Antarctic Larsen area
Owing to large-scale ice-shelf disintegration events, the Antarctic Larsen A and B areas recently became ice-free. During the ANT-XXIII/8 Polarstern campaign, this region was sampled for the first time. Our study is the first to investigate benthic communities in this area and their response to the...
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ftunivgent:oai:archive.ugent.be:1246211 2023-10-01T03:51:05+02:00 Response of nematode communities after large-scale ice-shelf collapse events in the Antarctic Larsen area Raes, Maarten Rose, Armin Vanreusel, Ann 2010 application/pdf https://biblio.ugent.be/publication/1246211 http://hdl.handle.net/1854/LU-1246211 https://doi.org/10.1111/j.1365-2486.2009.02137.x https://biblio.ugent.be/publication/1246211/file/1246212 eng eng https://biblio.ugent.be/publication/1246211 http://hdl.handle.net/1854/LU-1246211 http://dx.doi.org/10.1111/j.1365-2486.2009.02137.x https://biblio.ugent.be/publication/1246211/file/1246212 No license (in copyright) info:eu-repo/semantics/restrictedAccess GLOBAL CHANGE BIOLOGY ISSN: 1354-1013 Earth and Environmental Sciences ABYSSAL SITES MARINE NEMATODES PENINSULA BIODIVERSITY DIVERSITY Larsen nematodes FREE-LIVING NEMATODES WEDDELL SEA MEIOFAUNA COMMUNITIES BENTHIC COMMUNITIES SIGNY ISLAND Antarctica benthos ice-shelf collapse journalArticle info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion 2010 ftunivgent https://doi.org/10.1111/j.1365-2486.2009.02137.x 2023-09-06T22:26:01Z Owing to large-scale ice-shelf disintegration events, the Antarctic Larsen A and B areas recently became ice-free. During the ANT-XXIII/8 Polarstern campaign, this region was sampled for the first time. Our study is the first to investigate benthic communities in this area and their response to the collapse of ice shelves in the Antarctic. The nematofauna appears to be strongly influenced by the sudden ice-cover removal, although its response differs from that of the macro- and megabenthos. Our results indicate that precollapse, sub-ice communities were impoverished and characterized by low densities, low diversity and high dominance of a few taxa. This might still be visible at a station located deep inside the Larsen B embayment, where Halomonhystera was dominant. Post-collapse recolonization of the 'inner' stations, i.e. those located furthermost from the former ice-shelf edge, is believed to be a long-time process. At the time of sampling, community structure at the inner stations was not or only slightly influenced by colonization, and might be structured by local environmental conditions. Our results indicate that a locally increased food supply after ice-cover removal could provoke a faster, local response of the nematode assemblages compared with the response due to recolonization. Thalassomonhystera is recognized as an opportunist, taking advantage of increased food supply at inner stations A_South and B_North. Communities living close to the former ice-shelf edge are believed to be at an intermediate or late stage of succession, with a dominance of Microlaimus, a common Antarctic genus and quick colonizer. Densities here were comparable with those at other Antarctic stations, whereas they were considerably decreased at the inner stations. In general, the collapse of the Larsen ice shelves initially has a positive effect on the shelf nematode fauna in the area, both in terms of abundance and diversity. Article in Journal/Newspaper Antarc* Antarctic Antarctica Ice Shelf Ice Shelves Signy Island Weddell Sea Ghent University Academic Bibliography Antarctic Signy Island ENVELOPE(-45.595,-45.595,-60.708,-60.708) The Antarctic Weddell Weddell Sea Global Change Biology 16 5 1618 1631 |
institution |
Open Polar |
collection |
Ghent University Academic Bibliography |
op_collection_id |
ftunivgent |
language |
English |
topic |
Earth and Environmental Sciences ABYSSAL SITES MARINE NEMATODES PENINSULA BIODIVERSITY DIVERSITY Larsen nematodes FREE-LIVING NEMATODES WEDDELL SEA MEIOFAUNA COMMUNITIES BENTHIC COMMUNITIES SIGNY ISLAND Antarctica benthos ice-shelf collapse |
spellingShingle |
Earth and Environmental Sciences ABYSSAL SITES MARINE NEMATODES PENINSULA BIODIVERSITY DIVERSITY Larsen nematodes FREE-LIVING NEMATODES WEDDELL SEA MEIOFAUNA COMMUNITIES BENTHIC COMMUNITIES SIGNY ISLAND Antarctica benthos ice-shelf collapse Raes, Maarten Rose, Armin Vanreusel, Ann Response of nematode communities after large-scale ice-shelf collapse events in the Antarctic Larsen area |
topic_facet |
Earth and Environmental Sciences ABYSSAL SITES MARINE NEMATODES PENINSULA BIODIVERSITY DIVERSITY Larsen nematodes FREE-LIVING NEMATODES WEDDELL SEA MEIOFAUNA COMMUNITIES BENTHIC COMMUNITIES SIGNY ISLAND Antarctica benthos ice-shelf collapse |
description |
Owing to large-scale ice-shelf disintegration events, the Antarctic Larsen A and B areas recently became ice-free. During the ANT-XXIII/8 Polarstern campaign, this region was sampled for the first time. Our study is the first to investigate benthic communities in this area and their response to the collapse of ice shelves in the Antarctic. The nematofauna appears to be strongly influenced by the sudden ice-cover removal, although its response differs from that of the macro- and megabenthos. Our results indicate that precollapse, sub-ice communities were impoverished and characterized by low densities, low diversity and high dominance of a few taxa. This might still be visible at a station located deep inside the Larsen B embayment, where Halomonhystera was dominant. Post-collapse recolonization of the 'inner' stations, i.e. those located furthermost from the former ice-shelf edge, is believed to be a long-time process. At the time of sampling, community structure at the inner stations was not or only slightly influenced by colonization, and might be structured by local environmental conditions. Our results indicate that a locally increased food supply after ice-cover removal could provoke a faster, local response of the nematode assemblages compared with the response due to recolonization. Thalassomonhystera is recognized as an opportunist, taking advantage of increased food supply at inner stations A_South and B_North. Communities living close to the former ice-shelf edge are believed to be at an intermediate or late stage of succession, with a dominance of Microlaimus, a common Antarctic genus and quick colonizer. Densities here were comparable with those at other Antarctic stations, whereas they were considerably decreased at the inner stations. In general, the collapse of the Larsen ice shelves initially has a positive effect on the shelf nematode fauna in the area, both in terms of abundance and diversity. |
format |
Article in Journal/Newspaper |
author |
Raes, Maarten Rose, Armin Vanreusel, Ann |
author_facet |
Raes, Maarten Rose, Armin Vanreusel, Ann |
author_sort |
Raes, Maarten |
title |
Response of nematode communities after large-scale ice-shelf collapse events in the Antarctic Larsen area |
title_short |
Response of nematode communities after large-scale ice-shelf collapse events in the Antarctic Larsen area |
title_full |
Response of nematode communities after large-scale ice-shelf collapse events in the Antarctic Larsen area |
title_fullStr |
Response of nematode communities after large-scale ice-shelf collapse events in the Antarctic Larsen area |
title_full_unstemmed |
Response of nematode communities after large-scale ice-shelf collapse events in the Antarctic Larsen area |
title_sort |
response of nematode communities after large-scale ice-shelf collapse events in the antarctic larsen area |
publishDate |
2010 |
url |
https://biblio.ugent.be/publication/1246211 http://hdl.handle.net/1854/LU-1246211 https://doi.org/10.1111/j.1365-2486.2009.02137.x https://biblio.ugent.be/publication/1246211/file/1246212 |
long_lat |
ENVELOPE(-45.595,-45.595,-60.708,-60.708) |
geographic |
Antarctic Signy Island The Antarctic Weddell Weddell Sea |
geographic_facet |
Antarctic Signy Island The Antarctic Weddell Weddell Sea |
genre |
Antarc* Antarctic Antarctica Ice Shelf Ice Shelves Signy Island Weddell Sea |
genre_facet |
Antarc* Antarctic Antarctica Ice Shelf Ice Shelves Signy Island Weddell Sea |
op_source |
GLOBAL CHANGE BIOLOGY ISSN: 1354-1013 |
op_relation |
https://biblio.ugent.be/publication/1246211 http://hdl.handle.net/1854/LU-1246211 http://dx.doi.org/10.1111/j.1365-2486.2009.02137.x https://biblio.ugent.be/publication/1246211/file/1246212 |
op_rights |
No license (in copyright) info:eu-repo/semantics/restrictedAccess |
op_doi |
https://doi.org/10.1111/j.1365-2486.2009.02137.x |
container_title |
Global Change Biology |
container_volume |
16 |
container_issue |
5 |
container_start_page |
1618 |
op_container_end_page |
1631 |
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1778531445561622528 |