Quantitative analysis of macrobenthic soft-bottom assemblages in South Shetland waters (Antarctica)
Macrobenthic assemblages were investigated at 26 stations located around Livingston Island, Deception Island and the Bransfield Strait at depths ranging from 42 to 671 m. Representatives of 30 major taxa were found. The maximal density was 5,260 specimens·m−2 at Livingston Island; the mean abundance...
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ftcsic:oai:digital.csic.es:10261/328143 2024-02-11T09:57:35+01:00 Quantitative analysis of macrobenthic soft-bottom assemblages in South Shetland waters (Antarctica) Saiz-Salinas, José Ignacio Ramos, Ana García, Francisco José Troncoso, Jesús San-Martín, Guillermo Palacín, Cruz Antarctic Ocean 1997-04 http://hdl.handle.net/10508/10029 http://hdl.handle.net/10261/328143 https://doi.org/10.1007/PL00013382 en eng 10000-01-01 Centro Oceanográfico de Vigo Publisher's version http://link.springer.com/article/10.1007%2FPL00013382 Polar Biology, 17(4). 1997: 393-400 0722-4060 http://hdl.handle.net/10508/10029 http://hdl.handle.net/10261/328143 doi:10.1007/PL00013382 21639 embargo_100000101 Pesquerías Centro Oceanográfico de Vigo artículo http://purl.org/coar/resource_type/c_6501 1997 ftcsic https://doi.org/10.1007/PL00013382 2024-01-16T11:49:14Z Macrobenthic assemblages were investigated at 26 stations located around Livingston Island, Deception Island and the Bransfield Strait at depths ranging from 42 to 671 m. Representatives of 30 major taxa were found. The maximal density was 5,260 specimens·m−2 at Livingston Island; the mean abundance per station ranged from 160 to 4,380 specimens·m−2. The total biomass of the macrozoobenthos declined with depth, with mean values of 3,201 g·m−2 at shallower depths (< 100 m) and 210 g·m−2 further down (> 100 m). After multivariate analysis (cluster analysis, MDS) based on Bray-Curtis dissimilarities, most stations could be assigned to one of three groups on the basis of distinct biomass differences between sites. The first cluster with a rich Ascidiacea biomass is common on shallower bottoms. The second, with Ophiuroidea as a characteristic group, is common on deeper bottoms. The absence of an ‘indicator’ taxon is characteristic of the remaining cluster of those stations with the lowest biomass values. No significant correlations were detected between macrobenthic biomass and any sediment parameters measured, probably because part of the benthos (i.e. the epifauna) could be better explained by the coupling with a highly productive water column. The role of the epi-infauna sensu Gallardo as the main factor structuring benthic assemblages in the investigated area is discussed. SI Article in Journal/Newspaper Antarc* Antarctic Antarctic Ocean Antarctica Bransfield Strait Deception Island Livingston Island Polar Biology Digital.CSIC (Spanish National Research Council) Antarctic Antarctic Ocean Bransfield Strait 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) Polar Biology 17 4 393 400 |
institution |
Open Polar |
collection |
Digital.CSIC (Spanish National Research Council) |
op_collection_id |
ftcsic |
language |
English |
topic |
Pesquerías Centro Oceanográfico de Vigo |
spellingShingle |
Pesquerías Centro Oceanográfico de Vigo Saiz-Salinas, José Ignacio Ramos, Ana García, Francisco José Troncoso, Jesús San-Martín, Guillermo Palacín, Cruz Quantitative analysis of macrobenthic soft-bottom assemblages in South Shetland waters (Antarctica) |
topic_facet |
Pesquerías Centro Oceanográfico de Vigo |
description |
Macrobenthic assemblages were investigated at 26 stations located around Livingston Island, Deception Island and the Bransfield Strait at depths ranging from 42 to 671 m. Representatives of 30 major taxa were found. The maximal density was 5,260 specimens·m−2 at Livingston Island; the mean abundance per station ranged from 160 to 4,380 specimens·m−2. The total biomass of the macrozoobenthos declined with depth, with mean values of 3,201 g·m−2 at shallower depths (< 100 m) and 210 g·m−2 further down (> 100 m). After multivariate analysis (cluster analysis, MDS) based on Bray-Curtis dissimilarities, most stations could be assigned to one of three groups on the basis of distinct biomass differences between sites. The first cluster with a rich Ascidiacea biomass is common on shallower bottoms. The second, with Ophiuroidea as a characteristic group, is common on deeper bottoms. The absence of an ‘indicator’ taxon is characteristic of the remaining cluster of those stations with the lowest biomass values. No significant correlations were detected between macrobenthic biomass and any sediment parameters measured, probably because part of the benthos (i.e. the epifauna) could be better explained by the coupling with a highly productive water column. The role of the epi-infauna sensu Gallardo as the main factor structuring benthic assemblages in the investigated area is discussed. SI |
format |
Article in Journal/Newspaper |
author |
Saiz-Salinas, José Ignacio Ramos, Ana García, Francisco José Troncoso, Jesús San-Martín, Guillermo Palacín, Cruz |
author_facet |
Saiz-Salinas, José Ignacio Ramos, Ana García, Francisco José Troncoso, Jesús San-Martín, Guillermo Palacín, Cruz |
author_sort |
Saiz-Salinas, José Ignacio |
title |
Quantitative analysis of macrobenthic soft-bottom assemblages in South Shetland waters (Antarctica) |
title_short |
Quantitative analysis of macrobenthic soft-bottom assemblages in South Shetland waters (Antarctica) |
title_full |
Quantitative analysis of macrobenthic soft-bottom assemblages in South Shetland waters (Antarctica) |
title_fullStr |
Quantitative analysis of macrobenthic soft-bottom assemblages in South Shetland waters (Antarctica) |
title_full_unstemmed |
Quantitative analysis of macrobenthic soft-bottom assemblages in South Shetland waters (Antarctica) |
title_sort |
quantitative analysis of macrobenthic soft-bottom assemblages in south shetland waters (antarctica) |
publishDate |
1997 |
url |
http://hdl.handle.net/10508/10029 http://hdl.handle.net/10261/328143 https://doi.org/10.1007/PL00013382 |
op_coverage |
Antarctic Ocean |
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 Bransfield Strait Bray Deception Island Livingston Island |
geographic_facet |
Antarctic Antarctic Ocean Bransfield Strait Bray Deception Island Livingston Island |
genre |
Antarc* Antarctic Antarctic Ocean Antarctica Bransfield Strait Deception Island Livingston Island Polar Biology |
genre_facet |
Antarc* Antarctic Antarctic Ocean Antarctica Bransfield Strait Deception Island Livingston Island Polar Biology |
op_relation |
10000-01-01 Centro Oceanográfico de Vigo Publisher's version http://link.springer.com/article/10.1007%2FPL00013382 Polar Biology, 17(4). 1997: 393-400 0722-4060 http://hdl.handle.net/10508/10029 http://hdl.handle.net/10261/328143 doi:10.1007/PL00013382 21639 |
op_rights |
embargo_100000101 |
op_doi |
https://doi.org/10.1007/PL00013382 |
container_title |
Polar Biology |
container_volume |
17 |
container_issue |
4 |
container_start_page |
393 |
op_container_end_page |
400 |
_version_ |
1790593127134789632 |