Macro- and megabenthic assemblages in the bathyal and abyssal Weddell Sea (Southern Ocean)
The assemblages inhabiting the continental shelf around Antarctica are known to be very patchy, in large part due to deep iceberg impacts. The present study shows that richness and abundance of much deeper benthos, at slope and abyssal depths, also vary greatly in the Southern and South Atlantic oce...
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ftunivbruxelles:oai:dipot.ulb.ac.be:2013/188657 2023-05-15T13:55:32+02:00 Macro- and megabenthic assemblages in the bathyal and abyssal Weddell Sea (Southern Ocean) Linse, Katrin Brandt, Angelika Bohn, Jens Michael Danis, Bruno de Broyer, Claude Ebbe, Brigitte Heterier, Vincent Janussen, Dorte López González, Pablo José Schüller, Myriam Schwabe, Enrico Thomson, Michael R A 2007-08 1 full-text file(s): application/pdf http://hdl.handle.net/2013/ULB-DIPOT:oai:dipot.ulb.ac.be:2013/188657 https://dipot.ulb.ac.be/dspace/bitstream/2013/188657/1/Elsevier_172284.pdf en eng uri/info:doi/10.1016/j.dsr2.2007.07.011 uri/info:pii/S0967064507001427 uri/info:scp/34948820705 https://dipot.ulb.ac.be/dspace/bitstream/2013/188657/1/Elsevier_172284.pdf http://hdl.handle.net/2013/ULB-DIPOT:oai:dipot.ulb.ac.be:2013/188657 1 full-text file(s): info:eu-repo/semantics/restrictedAccess Deep-sea research. Part 2. Topical studies in oceanography, 54 (16-17 Océanographie physique et chimique Antarctica Benthos Deep-sea Macrofauna Megafauna South Atlantic info:eu-repo/semantics/article info:ulb-repo/semantics/articlePeerReview info:ulb-repo/semantics/openurl/article 2007 ftunivbruxelles 2022-06-12T20:40:02Z The assemblages inhabiting the continental shelf around Antarctica are known to be very patchy, in large part due to deep iceberg impacts. The present study shows that richness and abundance of much deeper benthos, at slope and abyssal depths, also vary greatly in the Southern and South Atlantic oceans. On the ANDEEP III expedition, we deployed 16 Agassiz trawls to sample the zoobenthos at depths from 1055 to 4930 m across the northern Weddell Sea and two South Atlantic basins. A total of 5933 specimens, belonging to 44 higher taxonomic groups, were collected. Overall the most frequent taxa were Ophiuroidea, Bivalvia, Polychaeta and Asteroidea, and the most abundant taxa were Malacostraca, Polychaeta and Bivalvia. Species richness per station varied from 6 to 148. The taxonomic composition of assemblages, based on relative taxon richness, varied considerably between sites but showed no relation to depth. The former three most abundant taxa accounted for 10-30% each of all taxa present. Standardised abundances based on trawl catches varied between 1 and 252 individuals per 1000 m2. Abundance significantly decreased with increasing depth, and assemblages showed high patchiness in their distribution. Cluster analysis based on relative abundance showed changes of community structure that were not linked to depth, area, sediment grain size or temperature. Generally abundances of zoobenthos in the abyssal Weddell Sea are lower than shelf abundances by several orders of magnitude. © 2007 Elsevier Ltd. All rights reserved. SCOPUS: ar.j info:eu-repo/semantics/published Article in Journal/Newspaper Antarc* Antarctica Southern Ocean Weddell Sea DI-fusion : dépôt institutionnel de l'Université libre de Bruxelles (ULB) Southern Ocean Weddell Weddell Sea |
institution |
Open Polar |
collection |
DI-fusion : dépôt institutionnel de l'Université libre de Bruxelles (ULB) |
op_collection_id |
ftunivbruxelles |
language |
English |
topic |
Océanographie physique et chimique Antarctica Benthos Deep-sea Macrofauna Megafauna South Atlantic |
spellingShingle |
Océanographie physique et chimique Antarctica Benthos Deep-sea Macrofauna Megafauna South Atlantic Linse, Katrin Brandt, Angelika Bohn, Jens Michael Danis, Bruno de Broyer, Claude Ebbe, Brigitte Heterier, Vincent Janussen, Dorte López González, Pablo José Schüller, Myriam Schwabe, Enrico Thomson, Michael R A Macro- and megabenthic assemblages in the bathyal and abyssal Weddell Sea (Southern Ocean) |
topic_facet |
Océanographie physique et chimique Antarctica Benthos Deep-sea Macrofauna Megafauna South Atlantic |
description |
The assemblages inhabiting the continental shelf around Antarctica are known to be very patchy, in large part due to deep iceberg impacts. The present study shows that richness and abundance of much deeper benthos, at slope and abyssal depths, also vary greatly in the Southern and South Atlantic oceans. On the ANDEEP III expedition, we deployed 16 Agassiz trawls to sample the zoobenthos at depths from 1055 to 4930 m across the northern Weddell Sea and two South Atlantic basins. A total of 5933 specimens, belonging to 44 higher taxonomic groups, were collected. Overall the most frequent taxa were Ophiuroidea, Bivalvia, Polychaeta and Asteroidea, and the most abundant taxa were Malacostraca, Polychaeta and Bivalvia. Species richness per station varied from 6 to 148. The taxonomic composition of assemblages, based on relative taxon richness, varied considerably between sites but showed no relation to depth. The former three most abundant taxa accounted for 10-30% each of all taxa present. Standardised abundances based on trawl catches varied between 1 and 252 individuals per 1000 m2. Abundance significantly decreased with increasing depth, and assemblages showed high patchiness in their distribution. Cluster analysis based on relative abundance showed changes of community structure that were not linked to depth, area, sediment grain size or temperature. Generally abundances of zoobenthos in the abyssal Weddell Sea are lower than shelf abundances by several orders of magnitude. © 2007 Elsevier Ltd. All rights reserved. SCOPUS: ar.j info:eu-repo/semantics/published |
format |
Article in Journal/Newspaper |
author |
Linse, Katrin Brandt, Angelika Bohn, Jens Michael Danis, Bruno de Broyer, Claude Ebbe, Brigitte Heterier, Vincent Janussen, Dorte López González, Pablo José Schüller, Myriam Schwabe, Enrico Thomson, Michael R A |
author_facet |
Linse, Katrin Brandt, Angelika Bohn, Jens Michael Danis, Bruno de Broyer, Claude Ebbe, Brigitte Heterier, Vincent Janussen, Dorte López González, Pablo José Schüller, Myriam Schwabe, Enrico Thomson, Michael R A |
author_sort |
Linse, Katrin |
title |
Macro- and megabenthic assemblages in the bathyal and abyssal Weddell Sea (Southern Ocean) |
title_short |
Macro- and megabenthic assemblages in the bathyal and abyssal Weddell Sea (Southern Ocean) |
title_full |
Macro- and megabenthic assemblages in the bathyal and abyssal Weddell Sea (Southern Ocean) |
title_fullStr |
Macro- and megabenthic assemblages in the bathyal and abyssal Weddell Sea (Southern Ocean) |
title_full_unstemmed |
Macro- and megabenthic assemblages in the bathyal and abyssal Weddell Sea (Southern Ocean) |
title_sort |
macro- and megabenthic assemblages in the bathyal and abyssal weddell sea (southern ocean) |
publishDate |
2007 |
url |
http://hdl.handle.net/2013/ULB-DIPOT:oai:dipot.ulb.ac.be:2013/188657 https://dipot.ulb.ac.be/dspace/bitstream/2013/188657/1/Elsevier_172284.pdf |
geographic |
Southern Ocean Weddell Weddell Sea |
geographic_facet |
Southern Ocean Weddell Weddell Sea |
genre |
Antarc* Antarctica Southern Ocean Weddell Sea |
genre_facet |
Antarc* Antarctica Southern Ocean Weddell Sea |
op_source |
Deep-sea research. Part 2. Topical studies in oceanography, 54 (16-17 |
op_relation |
uri/info:doi/10.1016/j.dsr2.2007.07.011 uri/info:pii/S0967064507001427 uri/info:scp/34948820705 https://dipot.ulb.ac.be/dspace/bitstream/2013/188657/1/Elsevier_172284.pdf http://hdl.handle.net/2013/ULB-DIPOT:oai:dipot.ulb.ac.be:2013/188657 |
op_rights |
1 full-text file(s): info:eu-repo/semantics/restrictedAccess |
_version_ |
1766262203943485440 |