Semi-quantitative study of macrobenthic fauna in the region of the South Shetland Islands and the Antarctic Peninsula
During the BENTART 95 Expedition, 24 Agassiz trawls for macrozoobenthos sampling were carried out at depths of 40–850 m, from north of Livingston Island to the Antarctic Peninsula. The samples were analysed using a semi-quantitative method, and with the resulting numerical data, transformed into a s...
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ftcsic:oai:digital.csic.es:10261/328140 2024-02-11T09:57:35+01:00 Semi-quantitative study of macrobenthic fauna in the region of the South Shetland Islands and the Antarctic Peninsula Arnaud, Patrick López, Carlos Olaso-Toca, Luis Ignacio Ramil, Francisco Ramos-Esplá, A.A. Ramos, Ana Antarctic Ocean Atlantic Ocean South Atlantic Southwest Atlantic 1998-02 http://hdl.handle.net/10508/10030 http://hdl.handle.net/10261/328140 https://doi.org/10.1007/s003000050229 en eng 10000-01-01 Centro Oceanográfico de Vigo Publisher's version http://link.springer.com/article/10.1007%2Fs003000050229 Polar Biology, 19(3). 1998: 160-166 0722-4060 http://hdl.handle.net/10508/10030 http://hdl.handle.net/10261/328140 doi:10.1007/s003000050229 21640 embargo_100000101 Centro Oceanográfico de Vigo Pesquerías artículo http://purl.org/coar/resource_type/c_6501 1998 ftcsic https://doi.org/10.1007/s003000050229 2024-01-16T11:49:14Z During the BENTART 95 Expedition, 24 Agassiz trawls for macrozoobenthos sampling were carried out at depths of 40–850 m, from north of Livingston Island to the Antarctic Peninsula. The samples were analysed using a semi-quantitative method, and with the resulting numerical data, transformed into a six-point scale, we constructed a Bray-Curtis similarity matrix. A total of 74,624 specimens, belonging to 38 taxonomic groups, were collected. The most abundant group was Polychaeta Sedentaria, with 36% of the total, whereas the highest relative masses were from Ascidiacea (23%), Echinoidea Regularia (18%) and Ophiuroidea (16%). The maximum number of specimens recorded was 15,600 ind./50 l. Cluster analysis separated stations located in Foster Bay (Deception Island), characterised by low taxonomic richness and high relative mass (average: 26.7 kg). A zonation of ascidians, regular sea urchins and ophiuroids was observed at Deception Island, clearly related to depth and substratum type. The remaining stations were separated into two groups. The first one comprised the shallowest stations (40–130 m), dominated by sessile active filter-feeders, belonging to Ascidiacea, Demospongia and Bryozoa, and probably related to high primary production zones. The second group comprised deeper stations and was dominated by classes exhibiting a diversity of trophic strategies: Ophiuroidea and Asteroidea, to 400 m, and Polychaeta Sedentaria at greater depths. SI Article in Journal/Newspaper Antarc* Antarctic Antarctic Ocean Antarctic Peninsula Deception Island Foster Bay Livingston Island Polar Biology South Shetland Islands Digital.CSIC (Spanish National Research Council) Antarctic Antarctic Ocean Antarctic Peninsula Bray ENVELOPE(-114.067,-114.067,-74.833,-74.833) Deception Island ENVELOPE(-60.633,-60.633,-62.950,-62.950) Livingston Island ENVELOPE(-60.500,-60.500,-62.600,-62.600) South Shetland Islands The Antarctic Polar Biology 19 3 160 166 |
institution |
Open Polar |
collection |
Digital.CSIC (Spanish National Research Council) |
op_collection_id |
ftcsic |
language |
English |
topic |
Centro Oceanográfico de Vigo Pesquerías |
spellingShingle |
Centro Oceanográfico de Vigo Pesquerías Arnaud, Patrick López, Carlos Olaso-Toca, Luis Ignacio Ramil, Francisco Ramos-Esplá, A.A. Ramos, Ana Semi-quantitative study of macrobenthic fauna in the region of the South Shetland Islands and the Antarctic Peninsula |
topic_facet |
Centro Oceanográfico de Vigo Pesquerías |
description |
During the BENTART 95 Expedition, 24 Agassiz trawls for macrozoobenthos sampling were carried out at depths of 40–850 m, from north of Livingston Island to the Antarctic Peninsula. The samples were analysed using a semi-quantitative method, and with the resulting numerical data, transformed into a six-point scale, we constructed a Bray-Curtis similarity matrix. A total of 74,624 specimens, belonging to 38 taxonomic groups, were collected. The most abundant group was Polychaeta Sedentaria, with 36% of the total, whereas the highest relative masses were from Ascidiacea (23%), Echinoidea Regularia (18%) and Ophiuroidea (16%). The maximum number of specimens recorded was 15,600 ind./50 l. Cluster analysis separated stations located in Foster Bay (Deception Island), characterised by low taxonomic richness and high relative mass (average: 26.7 kg). A zonation of ascidians, regular sea urchins and ophiuroids was observed at Deception Island, clearly related to depth and substratum type. The remaining stations were separated into two groups. The first one comprised the shallowest stations (40–130 m), dominated by sessile active filter-feeders, belonging to Ascidiacea, Demospongia and Bryozoa, and probably related to high primary production zones. The second group comprised deeper stations and was dominated by classes exhibiting a diversity of trophic strategies: Ophiuroidea and Asteroidea, to 400 m, and Polychaeta Sedentaria at greater depths. SI |
format |
Article in Journal/Newspaper |
author |
Arnaud, Patrick López, Carlos Olaso-Toca, Luis Ignacio Ramil, Francisco Ramos-Esplá, A.A. Ramos, Ana |
author_facet |
Arnaud, Patrick López, Carlos Olaso-Toca, Luis Ignacio Ramil, Francisco Ramos-Esplá, A.A. Ramos, Ana |
author_sort |
Arnaud, Patrick |
title |
Semi-quantitative study of macrobenthic fauna in the region of the South Shetland Islands and the Antarctic Peninsula |
title_short |
Semi-quantitative study of macrobenthic fauna in the region of the South Shetland Islands and the Antarctic Peninsula |
title_full |
Semi-quantitative study of macrobenthic fauna in the region of the South Shetland Islands and the Antarctic Peninsula |
title_fullStr |
Semi-quantitative study of macrobenthic fauna in the region of the South Shetland Islands and the Antarctic Peninsula |
title_full_unstemmed |
Semi-quantitative study of macrobenthic fauna in the region of the South Shetland Islands and the Antarctic Peninsula |
title_sort |
semi-quantitative study of macrobenthic fauna in the region of the south shetland islands and the antarctic peninsula |
publishDate |
1998 |
url |
http://hdl.handle.net/10508/10030 http://hdl.handle.net/10261/328140 https://doi.org/10.1007/s003000050229 |
op_coverage |
Antarctic Ocean Atlantic Ocean South Atlantic Southwest Atlantic |
long_lat |
ENVELOPE(-114.067,-114.067,-74.833,-74.833) ENVELOPE(-60.633,-60.633,-62.950,-62.950) ENVELOPE(-60.500,-60.500,-62.600,-62.600) |
geographic |
Antarctic Antarctic Ocean Antarctic Peninsula Bray Deception Island Livingston Island South Shetland Islands The Antarctic |
geographic_facet |
Antarctic Antarctic Ocean Antarctic Peninsula Bray Deception Island Livingston Island South Shetland Islands The Antarctic |
genre |
Antarc* Antarctic Antarctic Ocean Antarctic Peninsula Deception Island Foster Bay Livingston Island Polar Biology South Shetland Islands |
genre_facet |
Antarc* Antarctic Antarctic Ocean Antarctic Peninsula Deception Island Foster Bay Livingston Island Polar Biology South Shetland Islands |
op_relation |
10000-01-01 Centro Oceanográfico de Vigo Publisher's version http://link.springer.com/article/10.1007%2Fs003000050229 Polar Biology, 19(3). 1998: 160-166 0722-4060 http://hdl.handle.net/10508/10030 http://hdl.handle.net/10261/328140 doi:10.1007/s003000050229 21640 |
op_rights |
embargo_100000101 |
op_doi |
https://doi.org/10.1007/s003000050229 |
container_title |
Polar Biology |
container_volume |
19 |
container_issue |
3 |
container_start_page |
160 |
op_container_end_page |
166 |
_version_ |
1790593127335067648 |