Weddell Sea benthic communities under the influence of different ice regimes
Ice in its different forms affects benthic communities in Polar Regions directly and indirectly. In order to recognize effects of ice on benthic communities we analyzed benthos in four regions of the Weddell Sea: a) the southeastern Weddell Sea shelf (SEWSS); b) the Filchner-Rønne Outflow System (FR...
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ftawi:oai:epic.awi.de:45282 2023-05-15T13:45:21+02:00 Weddell Sea benthic communities under the influence of different ice regimes Pineda Metz, Santiago Kuvshinova, Olga Gerdes, Dieter 2017-07-13 application/pdf https://epic.awi.de/id/eprint/45282/ https://epic.awi.de/id/eprint/45282/1/PinedaMetzLeuven2017.pdf https://hdl.handle.net/10013/epic.51437 https://hdl.handle.net/10013/epic.51437.d001 unknown https://epic.awi.de/id/eprint/45282/1/PinedaMetzLeuven2017.pdf https://hdl.handle.net/10013/epic.51437.d001 Pineda Metz, S. orcid:0000-0001-7780-6449 , Kuvshinova, O. and Gerdes, D. (2017) Weddell Sea benthic communities under the influence of different ice regimes , XIIth SCAR Biology Symposium, Leuven, Belgium, 10 July 2017 - 14 July 2017 . hdl:10013/epic.51437 EPIC3XIIth SCAR Biology Symposium, Leuven, Belgium, 2017-07-10-2017-07-14 Conference notRev 2017 ftawi 2021-12-24T15:43:11Z Ice in its different forms affects benthic communities in Polar Regions directly and indirectly. In order to recognize effects of ice on benthic communities we analyzed benthos in four regions of the Weddell Sea: a) the southeastern Weddell Sea shelf (SEWSS); b) the Filchner-Rønne Outflow System (FROS); c) the Larsen A/B embayments; and d) the tip of the Antarctic Peninsula. These regions differ considerably in their ice regimes: The SEWSS is a typical high Antarctic habitat, influenced by seasonal sea ice coverage; the FROS is influenced by seasonal ice on its eastern edge, but under heavy year round ice conditions on its western edge; the Larsen A/B embayments were covered for hundreds of years by thick ice shelves, which recently disintegrated providing large areas for recolonization by benthos; and the shelf around the tip of the Antarctic Peninsula which can be considered as being unaffected by ice. Benthos in these four regions revealed distinct differences in abundance, biomass, and production values. Highest abundance values were found at the tip of the Antarctic Peninsula and along the SEWSS (2,767 and 2,535ind.m-2, respectively), whereas the lowest abundance corresponded to the Larsen A/B region (682ind.m-2). In terms of both, biomass and production, the southeastern Weddell Sea region showed the highest values (3,944.2g wet weight.m-2 and 10.3g C.y-1m-2, respectively), whereas the lowest values were found at Larsen A/B (71.08g.m-2 and 1.62g C.y-1.m-2) and FROS regions (71.08g.m-2 and 1.62 g C.y-1.m-2). A PERMANOVA showed the differences among regions to be significant in all three terms: abundance (Pseudo F=7.10; p=0.001), biomass (Pseudo F=6.01; p=0.001), and production (Pseudo F=6.28; p=0.001). These differences were mainly caused by sponges, ophiuroids and polychaetes. This study also shows pronounced differences in the structure, composition of the benthic communities in the four regions. We hypothesize that these differences are primarily due to the different sea-ice regimes in the regions. Conference Object Antarc* Antarctic Antarctic Peninsula Ice Shelves Sea ice Weddell Sea Alfred Wegener Institute for Polar- and Marine Research (AWI): ePIC (electronic Publication Information Center) Antarctic Antarctic Peninsula The Antarctic Weddell Weddell Sea |
institution |
Open Polar |
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Alfred Wegener Institute for Polar- and Marine Research (AWI): ePIC (electronic Publication Information Center) |
op_collection_id |
ftawi |
language |
unknown |
description |
Ice in its different forms affects benthic communities in Polar Regions directly and indirectly. In order to recognize effects of ice on benthic communities we analyzed benthos in four regions of the Weddell Sea: a) the southeastern Weddell Sea shelf (SEWSS); b) the Filchner-Rønne Outflow System (FROS); c) the Larsen A/B embayments; and d) the tip of the Antarctic Peninsula. These regions differ considerably in their ice regimes: The SEWSS is a typical high Antarctic habitat, influenced by seasonal sea ice coverage; the FROS is influenced by seasonal ice on its eastern edge, but under heavy year round ice conditions on its western edge; the Larsen A/B embayments were covered for hundreds of years by thick ice shelves, which recently disintegrated providing large areas for recolonization by benthos; and the shelf around the tip of the Antarctic Peninsula which can be considered as being unaffected by ice. Benthos in these four regions revealed distinct differences in abundance, biomass, and production values. Highest abundance values were found at the tip of the Antarctic Peninsula and along the SEWSS (2,767 and 2,535ind.m-2, respectively), whereas the lowest abundance corresponded to the Larsen A/B region (682ind.m-2). In terms of both, biomass and production, the southeastern Weddell Sea region showed the highest values (3,944.2g wet weight.m-2 and 10.3g C.y-1m-2, respectively), whereas the lowest values were found at Larsen A/B (71.08g.m-2 and 1.62g C.y-1.m-2) and FROS regions (71.08g.m-2 and 1.62 g C.y-1.m-2). A PERMANOVA showed the differences among regions to be significant in all three terms: abundance (Pseudo F=7.10; p=0.001), biomass (Pseudo F=6.01; p=0.001), and production (Pseudo F=6.28; p=0.001). These differences were mainly caused by sponges, ophiuroids and polychaetes. This study also shows pronounced differences in the structure, composition of the benthic communities in the four regions. We hypothesize that these differences are primarily due to the different sea-ice regimes in the regions. |
format |
Conference Object |
author |
Pineda Metz, Santiago Kuvshinova, Olga Gerdes, Dieter |
spellingShingle |
Pineda Metz, Santiago Kuvshinova, Olga Gerdes, Dieter Weddell Sea benthic communities under the influence of different ice regimes |
author_facet |
Pineda Metz, Santiago Kuvshinova, Olga Gerdes, Dieter |
author_sort |
Pineda Metz, Santiago |
title |
Weddell Sea benthic communities under the influence of different ice regimes |
title_short |
Weddell Sea benthic communities under the influence of different ice regimes |
title_full |
Weddell Sea benthic communities under the influence of different ice regimes |
title_fullStr |
Weddell Sea benthic communities under the influence of different ice regimes |
title_full_unstemmed |
Weddell Sea benthic communities under the influence of different ice regimes |
title_sort |
weddell sea benthic communities under the influence of different ice regimes |
publishDate |
2017 |
url |
https://epic.awi.de/id/eprint/45282/ https://epic.awi.de/id/eprint/45282/1/PinedaMetzLeuven2017.pdf https://hdl.handle.net/10013/epic.51437 https://hdl.handle.net/10013/epic.51437.d001 |
geographic |
Antarctic Antarctic Peninsula The Antarctic Weddell Weddell Sea |
geographic_facet |
Antarctic Antarctic Peninsula The Antarctic Weddell Weddell Sea |
genre |
Antarc* Antarctic Antarctic Peninsula Ice Shelves Sea ice Weddell Sea |
genre_facet |
Antarc* Antarctic Antarctic Peninsula Ice Shelves Sea ice Weddell Sea |
op_source |
EPIC3XIIth SCAR Biology Symposium, Leuven, Belgium, 2017-07-10-2017-07-14 |
op_relation |
https://epic.awi.de/id/eprint/45282/1/PinedaMetzLeuven2017.pdf https://hdl.handle.net/10013/epic.51437.d001 Pineda Metz, S. orcid:0000-0001-7780-6449 , Kuvshinova, O. and Gerdes, D. (2017) Weddell Sea benthic communities under the influence of different ice regimes , XIIth SCAR Biology Symposium, Leuven, Belgium, 10 July 2017 - 14 July 2017 . hdl:10013/epic.51437 |
_version_ |
1766220921406750720 |