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...
Published in: | Scientia Marina |
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Main Author: | |
Format: | Article in Journal/Newspaper |
Language: | English |
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Consejo Superior de Investigaciones Científicas
1999
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Online Access: | https://scientiamarina.revistas.csic.es/index.php/scientiamarina/article/view/901 https://doi.org/10.3989/scimar.1999.63s1171 |
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ftjscientiamarin:oai:scientiamarina.revistas.csic.es:article/901 |
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Open Polar |
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Scientia Marina (E-Journal) |
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ftjscientiamarin |
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, 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. 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 Orcadas, 46 en Elefante y 65 en Shetlands) a profundidades comprendidas entre 26 y 643 m. Entre los hechos mas interesantes que ponen de manifiesto los análisis multivariantes se encuentran la particularidad de Shag Rocks, el área más próxima a la región de Magallanes, y de las volcánicas islas Sandwich, así como la similaridad de Georgia del Sur y Orcadas y de las islas cercanas al continente antártico, en especial Elefante y Shetlands. Esta similaridad viene determinada por la mayor frecuencia y abundancia de los taxones más característicos del epibentos antártico, tanto suspensívoros sésiles (esponjas, briozoos calcáreos, pennatúlidos, crinoideos), como móviles y con variedad de estrategias tróficas (asteroideos, holoturoideos, picnogónidos, grandes isópodos y gammáridos). La información permite constatar la extensión de las comunidades de suspensívoros de larga vida, demosponjas y hexactinéllidas, características del epibentos antártico, hasta la plataforma este de Georgia, sin que alcancen el noroeste de esta isla, las islas Sandwich, ni los islotes Shag. Algunas de las zonas con ricas comunidades de filtradores sésiles, esponjas de larga vida o formaciones arrecifales de briozoos calcáreos o serpúlidos, podrían ser propuestas para su designación como Áreas Especialmente Protegidas. |
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 |
publisher |
Consejo Superior de Investigaciones Científicas |
publishDate |
1999 |
url |
https://scientiamarina.revistas.csic.es/index.php/scientiamarina/article/view/901 https://doi.org/10.3989/scimar.1999.63s1171 |
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(-62.933,-62.933,-64.883,-64.883) ENVELOPE(-60.383,-60.383,-62.660,-62.660) ENVELOPE(-60.767,-60.767,-62.467,-62.467) ENVELOPE(-44.717,-44.717,-60.750,-60.750) ENVELOPE(-55.167,-55.167,-61.167,-61.167) ENVELOPE(-42.033,-42.033,-53.550,-53.550) |
geographic |
Antarctic The Antarctic Sandwich Islands South Sandwich Islands South Shetland Islands South Georgia South Orkney Islands Elephant Island Magallanes Española Larga Orcadas Elefante Shag Rocks |
geographic_facet |
Antarctic The Antarctic Sandwich Islands South Sandwich Islands South Shetland Islands South Georgia South Orkney Islands Elephant Island Magallanes Española Larga Orcadas Elefante Shag Rocks |
genre |
Antarc* Antarctic Antártida Elephant Island South Orkney Islands South Sandwich Islands South Shetland Islands |
genre_facet |
Antarc* Antarctic Antártida Elephant Island South Orkney Islands South Sandwich Islands South Shetland Islands |
op_source |
Scientia Marina; Vol. 63 No. S1 (1999); 171-182 Scientia Marina; Vol. 63 Núm. S1 (1999); 171-182 1886-8134 0214-8358 10.3989/scimar.1999.63s1 |
op_relation |
https://scientiamarina.revistas.csic.es/index.php/scientiamarina/article/view/901/943 https://scientiamarina.revistas.csic.es/index.php/scientiamarina/article/view/901 doi:10.3989/scimar.1999.63s1171 |
op_rights |
Copyright (c) 1999 Consejo Superior de Investigaciones Científicas (CSIC) https://creativecommons.org/licenses/by/4.0 |
op_rightsnorm |
CC-BY |
op_doi |
https://doi.org/10.3989/scimar.1999.63s1171 https://doi.org/10.3989/scimar.1999.63s1 |
container_title |
Scientia Marina |
container_volume |
63 |
container_issue |
S1 |
container_start_page |
171 |
op_container_end_page |
182 |
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1766159269890097152 |
spelling |
ftjscientiamarin:oai:scientiamarina.revistas.csic.es:article/901 2023-05-15T13:41:51+02:00 The megazoobenthos of the Scotia Arc islands El megazoobentos en las islas del Arco de Escocia. Ramos, Ana 1999-12-30 application/pdf https://scientiamarina.revistas.csic.es/index.php/scientiamarina/article/view/901 https://doi.org/10.3989/scimar.1999.63s1171 eng eng Consejo Superior de Investigaciones Científicas https://scientiamarina.revistas.csic.es/index.php/scientiamarina/article/view/901/943 https://scientiamarina.revistas.csic.es/index.php/scientiamarina/article/view/901 doi:10.3989/scimar.1999.63s1171 Copyright (c) 1999 Consejo Superior de Investigaciones Científicas (CSIC) https://creativecommons.org/licenses/by/4.0 CC-BY Scientia Marina; Vol. 63 No. S1 (1999); 171-182 Scientia Marina; Vol. 63 Núm. S1 (1999); 171-182 1886-8134 0214-8358 10.3989/scimar.1999.63s1 Megabenthos composition distribution Scotia Arc Islands Megabentos composición distribución islas del Arco de Escocia info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion Peer-reviewed article Artículo revisado por pares 1999 ftjscientiamarin https://doi.org/10.3989/scimar.1999.63s1171 https://doi.org/10.3989/scimar.1999.63s1 2022-03-20T16:30:49Z 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. 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 Orcadas, 46 en Elefante y 65 en Shetlands) a profundidades comprendidas entre 26 y 643 m. Entre los hechos mas interesantes que ponen de manifiesto los análisis multivariantes se encuentran la particularidad de Shag Rocks, el área más próxima a la región de Magallanes, y de las volcánicas islas Sandwich, así como la similaridad de Georgia del Sur y Orcadas y de las islas cercanas al continente antártico, en especial Elefante y Shetlands. Esta similaridad viene determinada por la mayor frecuencia y abundancia de los taxones más característicos del epibentos antártico, tanto suspensívoros sésiles (esponjas, briozoos calcáreos, pennatúlidos, crinoideos), como móviles y con variedad de estrategias tróficas (asteroideos, holoturoideos, picnogónidos, grandes isópodos y gammáridos). La información permite constatar la extensión de las comunidades de suspensívoros de larga vida, demosponjas y hexactinéllidas, características del epibentos antártico, hasta la plataforma este de Georgia, sin que alcancen el noroeste de esta isla, las islas Sandwich, ni los islotes Shag. Algunas de las zonas con ricas comunidades de filtradores sésiles, esponjas de larga vida o formaciones arrecifales de briozoos calcáreos o serpúlidos, podrían ser propuestas para su designación como Áreas Especialmente Protegidas. Article in Journal/Newspaper Antarc* Antarctic Antártida Elephant Island South Orkney Islands South Sandwich Islands South Shetland Islands Scientia Marina (E-Journal) Antarctic The Antarctic Sandwich Islands South Sandwich Islands South Shetland Islands 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) Magallanes ENVELOPE(-62.933,-62.933,-64.883,-64.883) Española ENVELOPE(-60.383,-60.383,-62.660,-62.660) Larga ENVELOPE(-60.767,-60.767,-62.467,-62.467) Orcadas ENVELOPE(-44.717,-44.717,-60.750,-60.750) Elefante ENVELOPE(-55.167,-55.167,-61.167,-61.167) Shag Rocks ENVELOPE(-42.033,-42.033,-53.550,-53.550) Scientia Marina 63 S1 171 182 |