Changes in the biomass and dominant feeding mode of benthic assemblages with depth off Livingston Island (Antarctica)
To elucidate spatial assemblage patterns during 2 consecutive austral summer seasons, we sampled intensively the macrofauna from 73 stations located at the southern coast of Livingston Island. Representatives of 28 higher taxonomic groups were used for the faunal analysis. While two faunal descripto...
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ftcsic:oai:digital.csic.es:10261/328142 2024-02-11T09:57:35+01:00 Changes in the biomass and dominant feeding mode of benthic assemblages with depth off Livingston Island (Antarctica) Saiz-Salinas, José Ignacio Ramos, Ana Munilla, Tomás Rauschert, Martin Antartic Ocean 1998-05 http://hdl.handle.net/10508/10032 http://hdl.handle.net/10261/328142 https://doi.org/10.1007/s003000050269 en eng 10000-01-01 Centro Oceanográfico de Vigo Publisher's version http://link.springer.com/article/10.1007%2Fs003000050269 Polar Biology, 19(6). 1998: 424-428 0722-4060 http://hdl.handle.net/10508/10032 http://hdl.handle.net/10261/328142 doi:10.1007/s003000050269 21642 embargo_100000101 Centro Oceanográfico de Vigo Pesquerías artículo http://purl.org/coar/resource_type/c_6501 1998 ftcsic https://doi.org/10.1007/s003000050269 2024-01-16T11:49:14Z To elucidate spatial assemblage patterns during 2 consecutive austral summer seasons, we sampled intensively the macrofauna from 73 stations located at the southern coast of Livingston Island. Representatives of 28 higher taxonomic groups were used for the faunal analysis. While two faunal descriptors (i.e. group richness and total biomass) changed markedly with increasing water depth, total density remained relatively constant. Sessile suspension-feeders belonging to the Ascidiacea and Porifera dominated at shallower depths (<100 m) with a mean biomass (wet weight) estimate of 3,238 g m−2. In contrast, deeper faunal assemblages were dominated by deposit-feeding polychaetes with lower biomass values of 538 g m−2. Mean body mass for dominant groups reflected two contrasting trophic strategies: ascidians at shallower depths (<100 m) attained a value of 6 g whereas a comparable density of polychaetes at deeper depths (>100 m) obtained 0.37 g. This faunal discontinuity, primarily influenced by depth-related variables, is suggested to be directly related to food availability. SI Article in Journal/Newspaper Antarc* Antarctica antartic* Livingston Island Polar Biology Digital.CSIC (Spanish National Research Council) Austral Livingston Island ENVELOPE(-60.500,-60.500,-62.600,-62.600) Polar Biology 19 6 424 428 |
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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 Saiz-Salinas, José Ignacio Ramos, Ana Munilla, Tomás Rauschert, Martin Changes in the biomass and dominant feeding mode of benthic assemblages with depth off Livingston Island (Antarctica) |
topic_facet |
Centro Oceanográfico de Vigo Pesquerías |
description |
To elucidate spatial assemblage patterns during 2 consecutive austral summer seasons, we sampled intensively the macrofauna from 73 stations located at the southern coast of Livingston Island. Representatives of 28 higher taxonomic groups were used for the faunal analysis. While two faunal descriptors (i.e. group richness and total biomass) changed markedly with increasing water depth, total density remained relatively constant. Sessile suspension-feeders belonging to the Ascidiacea and Porifera dominated at shallower depths (<100 m) with a mean biomass (wet weight) estimate of 3,238 g m−2. In contrast, deeper faunal assemblages were dominated by deposit-feeding polychaetes with lower biomass values of 538 g m−2. Mean body mass for dominant groups reflected two contrasting trophic strategies: ascidians at shallower depths (<100 m) attained a value of 6 g whereas a comparable density of polychaetes at deeper depths (>100 m) obtained 0.37 g. This faunal discontinuity, primarily influenced by depth-related variables, is suggested to be directly related to food availability. SI |
format |
Article in Journal/Newspaper |
author |
Saiz-Salinas, José Ignacio Ramos, Ana Munilla, Tomás Rauschert, Martin |
author_facet |
Saiz-Salinas, José Ignacio Ramos, Ana Munilla, Tomás Rauschert, Martin |
author_sort |
Saiz-Salinas, José Ignacio |
title |
Changes in the biomass and dominant feeding mode of benthic assemblages with depth off Livingston Island (Antarctica) |
title_short |
Changes in the biomass and dominant feeding mode of benthic assemblages with depth off Livingston Island (Antarctica) |
title_full |
Changes in the biomass and dominant feeding mode of benthic assemblages with depth off Livingston Island (Antarctica) |
title_fullStr |
Changes in the biomass and dominant feeding mode of benthic assemblages with depth off Livingston Island (Antarctica) |
title_full_unstemmed |
Changes in the biomass and dominant feeding mode of benthic assemblages with depth off Livingston Island (Antarctica) |
title_sort |
changes in the biomass and dominant feeding mode of benthic assemblages with depth off livingston island (antarctica) |
publishDate |
1998 |
url |
http://hdl.handle.net/10508/10032 http://hdl.handle.net/10261/328142 https://doi.org/10.1007/s003000050269 |
op_coverage |
Antartic Ocean |
long_lat |
ENVELOPE(-60.500,-60.500,-62.600,-62.600) |
geographic |
Austral Livingston Island |
geographic_facet |
Austral Livingston Island |
genre |
Antarc* Antarctica antartic* Livingston Island Polar Biology |
genre_facet |
Antarc* Antarctica antartic* Livingston Island Polar Biology |
op_relation |
10000-01-01 Centro Oceanográfico de Vigo Publisher's version http://link.springer.com/article/10.1007%2Fs003000050269 Polar Biology, 19(6). 1998: 424-428 0722-4060 http://hdl.handle.net/10508/10032 http://hdl.handle.net/10261/328142 doi:10.1007/s003000050269 21642 |
op_rights |
embargo_100000101 |
op_doi |
https://doi.org/10.1007/s003000050269 |
container_title |
Polar Biology |
container_volume |
19 |
container_issue |
6 |
container_start_page |
424 |
op_container_end_page |
428 |
_version_ |
1790593126926123008 |