The megazoobenthos of the Scotia Arc islands

Megabenthic epifauna composition and distribution from the Scotia Arc islands based on data collected during the Antarctic summer of 1986-87 is presented. Samples were taken from bottom trawl catches at 345 stations (29 at Shag Rocks, 104 at South Georgia, 8 at the South Sandwich Islands, 93 at the...

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Main Author: Ramos, Ana
Format: Article in Journal/Newspaper
Language:English
Published: 1999
Subjects:
Online Access:http://hdl.handle.net/10508/10034
http://hdl.handle.net/10261/328905
id ftcsic:oai:digital.csic.es:10261/328905
record_format openpolar
spelling ftcsic:oai:digital.csic.es:10261/328905 2024-02-11T09:57:00+01:00 The megazoobenthos of the Scotia Arc islands Ramos, Ana Antarctic Ocean Antarctic Atlantic Scotia Sea 1999 http://hdl.handle.net/10508/10034 http://hdl.handle.net/10261/328905 en eng Centro Oceanográfico de Vigo VoR http://scimar.icm.csic.es/scimar/index.php/secId/6/IdArt/434/ Scientia Marina, 63(Suppl.1). 1999: 171-182 0214-8358 http://hdl.handle.net/10508/10034 http://hdl.handle.net/10261/328905 21644 open Centro Oceanográfico de Vigo Pesquerías Megabenthos Composition Distribution Scotia Arc Islands Megabentos Composición Distribución Islas del Arco de Escocia research article 1999 ftcsic 2024-01-16T11:49:32Z Megabenthic epifauna composition and distribution from the Scotia Arc islands based on data collected during the Antarctic summer of 1986-87 is presented. Samples were taken from bottom trawl catches at 345 stations (29 at Shag Rocks, 104 at South Georgia, 8 at the South Sandwich Islands, 93 at the South Orkney Islands, 46 at Elephant Island, and 65 at the South Shetland Islands), from 26 to 643 m depth. Among the most striking features of the faunistic composition of the area, pointed out by multivariate analysis, are the singularity of Shag Rocks, closer to the Magellan region, and of the volcanic South Sandwich Islands, as well as the similarity of South Georgia and the South Orkney Islands and that of the islands nearest to the Antarctic continent, especially Elephant Island and the South Shetlands Islands. This similarity is due to the higher frequency and abundance of the most characteristic taxa in the Antarctic epibenthos, such as sessile suspension feeders (sponges, calcareous bryozoans, pennatulids, crinoids), and motile fauna with a wide variety of trophic strategies (asteroids, holothurians, pycnogonids, large isopods and gammarids). These data confirm the fact that the long-lived suspension-feeder communities, demosponges and hexactinellids, characteristic of the Antarctic epibenthos stretch to the eastern shelf of South Georgia without reaching the north-west of this island, the South Sandwich Islands, and Shag Rocks. Some of the zones with rich communities of sessile filter-feeders, long-lived sponges or reef formations of calcareous bryozoans or serpulids should be proposed as Specially Protected Areas. EL MEGAZOOBENTOS EN LAS ISLAS DEL ARCO DE ESCOCIA. – En el presente trabajo se ofrece una visión de conjunto sobre la composición y distribución de la epifauna megabentónica en las islas del Arco de Escocia. Los datos proceden de las capturas de la campaña española ‘Antártida 8611’, que en 1986-87 realizó 345 arrastres de fondo en la zona (29 en Shag Rocks, 104 en Georgia, 8 en Sandwich, 93 en ... Article in Journal/Newspaper Antarc* Antarctic Antarctic Ocean Antártida Elephant Island Scotia Sea South Orkney Islands South Sandwich Islands South Shetland Islands Digital.CSIC (Spanish National Research Council) Antarctic The Antarctic Scotia Sea Sandwich Islands South Sandwich Islands South Shetland Islands Antarctic Ocean South Georgia ENVELOPE(-33.000,-33.000,-56.000,-56.000) South Orkney Islands ENVELOPE(-45.500,-45.500,-60.583,-60.583) Elephant Island ENVELOPE(-55.184,-55.184,-61.085,-61.085) Española ENVELOPE(-60.383,-60.383,-62.660,-62.660) Shag Rocks ENVELOPE(-42.033,-42.033,-53.550,-53.550)
institution Open Polar
collection Digital.CSIC (Spanish National Research Council)
op_collection_id ftcsic
language English
topic Centro Oceanográfico de Vigo
Pesquerías
Megabenthos
Composition
Distribution
Scotia Arc Islands
Megabentos
Composición
Distribución
Islas del Arco de Escocia
spellingShingle Centro Oceanográfico de Vigo
Pesquerías
Megabenthos
Composition
Distribution
Scotia Arc Islands
Megabentos
Composición
Distribución
Islas del Arco de Escocia
Ramos, Ana
The megazoobenthos of the Scotia Arc islands
topic_facet Centro Oceanográfico de Vigo
Pesquerías
Megabenthos
Composition
Distribution
Scotia Arc Islands
Megabentos
Composición
Distribución
Islas del Arco de Escocia
description Megabenthic epifauna composition and distribution from the Scotia Arc islands based on data collected during the Antarctic summer of 1986-87 is presented. Samples were taken from bottom trawl catches at 345 stations (29 at Shag Rocks, 104 at South Georgia, 8 at the South Sandwich Islands, 93 at the South Orkney Islands, 46 at Elephant Island, and 65 at the South Shetland Islands), from 26 to 643 m depth. Among the most striking features of the faunistic composition of the area, pointed out by multivariate analysis, are the singularity of Shag Rocks, closer to the Magellan region, and of the volcanic South Sandwich Islands, as well as the similarity of South Georgia and the South Orkney Islands and that of the islands nearest to the Antarctic continent, especially Elephant Island and the South Shetlands Islands. This similarity is due to the higher frequency and abundance of the most characteristic taxa in the Antarctic epibenthos, such as sessile suspension feeders (sponges, calcareous bryozoans, pennatulids, crinoids), and motile fauna with a wide variety of trophic strategies (asteroids, holothurians, pycnogonids, large isopods and gammarids). These data confirm the fact that the long-lived suspension-feeder communities, demosponges and hexactinellids, characteristic of the Antarctic epibenthos stretch to the eastern shelf of South Georgia without reaching the north-west of this island, the South Sandwich Islands, and Shag Rocks. Some of the zones with rich communities of sessile filter-feeders, long-lived sponges or reef formations of calcareous bryozoans or serpulids should be proposed as Specially Protected Areas. EL MEGAZOOBENTOS EN LAS ISLAS DEL ARCO DE ESCOCIA. – En el presente trabajo se ofrece una visión de conjunto sobre la composición y distribución de la epifauna megabentónica en las islas del Arco de Escocia. Los datos proceden de las capturas de la campaña española ‘Antártida 8611’, que en 1986-87 realizó 345 arrastres de fondo en la zona (29 en Shag Rocks, 104 en Georgia, 8 en Sandwich, 93 en ...
format Article in Journal/Newspaper
author Ramos, Ana
author_facet Ramos, Ana
author_sort Ramos, Ana
title The megazoobenthos of the Scotia Arc islands
title_short The megazoobenthos of the Scotia Arc islands
title_full The megazoobenthos of the Scotia Arc islands
title_fullStr The megazoobenthos of the Scotia Arc islands
title_full_unstemmed The megazoobenthos of the Scotia Arc islands
title_sort megazoobenthos of the scotia arc islands
publishDate 1999
url http://hdl.handle.net/10508/10034
http://hdl.handle.net/10261/328905
op_coverage Antarctic Ocean
Antarctic Atlantic
Scotia Sea
long_lat ENVELOPE(-33.000,-33.000,-56.000,-56.000)
ENVELOPE(-45.500,-45.500,-60.583,-60.583)
ENVELOPE(-55.184,-55.184,-61.085,-61.085)
ENVELOPE(-60.383,-60.383,-62.660,-62.660)
ENVELOPE(-42.033,-42.033,-53.550,-53.550)
geographic Antarctic
The Antarctic
Scotia Sea
Sandwich Islands
South Sandwich Islands
South Shetland Islands
Antarctic Ocean
South Georgia
South Orkney Islands
Elephant Island
Española
Shag Rocks
geographic_facet Antarctic
The Antarctic
Scotia Sea
Sandwich Islands
South Sandwich Islands
South Shetland Islands
Antarctic Ocean
South Georgia
South Orkney Islands
Elephant Island
Española
Shag Rocks
genre Antarc*
Antarctic
Antarctic Ocean
Antártida
Elephant Island
Scotia Sea
South Orkney Islands
South Sandwich Islands
South Shetland Islands
genre_facet Antarc*
Antarctic
Antarctic Ocean
Antártida
Elephant Island
Scotia Sea
South Orkney Islands
South Sandwich Islands
South Shetland Islands
op_relation Centro Oceanográfico de Vigo
VoR
http://scimar.icm.csic.es/scimar/index.php/secId/6/IdArt/434/
Scientia Marina, 63(Suppl.1). 1999: 171-182
0214-8358
http://hdl.handle.net/10508/10034
http://hdl.handle.net/10261/328905
21644
op_rights open
_version_ 1790607680607354880