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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Centro Oceanográfico de Vigo
1999
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ftieo:oai:repositorio.ieo.es:10508/10034 2023-05-15T13:41:24+02:00 The megazoobenthos of the Scotia Arc islands Ramos, A. (Ana) Antarctic Ocean Antarctic Atlantic Scotia Sea 1999 http://hdl.handle.net/10508/10034 eng eng Centro Oceanográfico de Vigo http://scimar.icm.csic.es/scimar/index.php/secId/6/IdArt/434/ 0214-8358 http://hdl.handle.net/10508/10034 Scientia Marina, 63(Suppl.1). 1999: 171-182 Atribución-NoComercial-SinDerivadas 3.0 España http://creativecommons.org/licenses/by-nc-nd/3.0/es/ openAccess CC-BY-NC-ND Megabenthos Composition Distribution Scotia Arc Islands Megabentos Composición Distribución Islas del Arco de Escocia article 1999 ftieo 2022-07-26T23:48:52Z 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 Instituto Español de Oceanografía: e-IEO Antarctic Antarctic Ocean Elephant Island ENVELOPE(-55.184,-55.184,-61.085,-61.085) Española ENVELOPE(-60.383,-60.383,-62.660,-62.660) Sandwich Islands Scotia Sea Shag Rocks ENVELOPE(-42.033,-42.033,-53.550,-53.550) South Georgia ENVELOPE(-33.000,-33.000,-56.000,-56.000) South Orkney Islands ENVELOPE(-45.500,-45.500,-60.583,-60.583) South Sandwich Islands South Shetland Islands The Antarctic |
institution |
Open Polar |
collection |
Instituto Español de Oceanografía: e-IEO |
op_collection_id |
ftieo |
language |
English |
topic |
Megabenthos Composition Distribution Scotia Arc Islands Megabentos Composición Distribución Islas del Arco de Escocia |
spellingShingle |
Megabenthos Composition Distribution Scotia Arc Islands Megabentos Composición Distribución Islas del Arco de Escocia Ramos, A. (Ana) The megazoobenthos of the Scotia Arc islands |
topic_facet |
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, A. (Ana) |
author_facet |
Ramos, A. (Ana) |
author_sort |
Ramos, A. (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 |
publisher |
Centro Oceanográfico de Vigo |
publishDate |
1999 |
url |
http://hdl.handle.net/10508/10034 |
op_coverage |
Antarctic Ocean Antarctic Atlantic Scotia Sea |
long_lat |
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) ENVELOPE(-33.000,-33.000,-56.000,-56.000) ENVELOPE(-45.500,-45.500,-60.583,-60.583) |
geographic |
Antarctic Antarctic Ocean Elephant Island Española Sandwich Islands Scotia Sea Shag Rocks South Georgia South Orkney Islands South Sandwich Islands South Shetland Islands The Antarctic |
geographic_facet |
Antarctic Antarctic Ocean Elephant Island Española Sandwich Islands Scotia Sea Shag Rocks South Georgia South Orkney Islands South Sandwich Islands South Shetland Islands The Antarctic |
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 |
http://scimar.icm.csic.es/scimar/index.php/secId/6/IdArt/434/ 0214-8358 http://hdl.handle.net/10508/10034 Scientia Marina, 63(Suppl.1). 1999: 171-182 |
op_rights |
Atribución-NoComercial-SinDerivadas 3.0 España http://creativecommons.org/licenses/by-nc-nd/3.0/es/ openAccess |
op_rightsnorm |
CC-BY-NC-ND |
_version_ |
1766150462988353536 |