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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Consejo Superior de Investigaciones Científicas
1999
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ftdoajarticles:oai:doaj.org/article:ffb571e573ef40409bc546a34ffabd04 2023-05-15T14:01:48+02:00 The megazoobenthos of the Scotia Arc islands Ana Ramos 1999-12-01T00:00:00Z https://doi.org/10.3989/scimar.1999.63s1171 https://doaj.org/article/ffb571e573ef40409bc546a34ffabd04 EN eng Consejo Superior de Investigaciones Científicas http://scientiamarina.revistas.csic.es/index.php/scientiamarina/article/view/901 https://doaj.org/toc/0214-8358 https://doaj.org/toc/1886-8134 0214-8358 1886-8134 doi:10.3989/scimar.1999.63s1171 https://doaj.org/article/ffb571e573ef40409bc546a34ffabd04 Scientia Marina, Vol 63, Iss S1, Pp 171-182 (1999) megabenthos composition distribution scotia arc islands Aquaculture. Fisheries. Angling SH1-691 article 1999 ftdoajarticles https://doi.org/10.3989/scimar.1999.63s1171 2022-12-31T05:38:28Z 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. Article in Journal/Newspaper Antarc* Antarctic Elephant Island South Orkney Islands South Sandwich Islands South Shetland Islands Directory of Open Access Journals: DOAJ Articles Antarctic Elephant Island ENVELOPE(-55.184,-55.184,-61.085,-61.085) Sandwich Islands 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 Scientia Marina 63 S1 171 182 |
institution |
Open Polar |
collection |
Directory of Open Access Journals: DOAJ Articles |
op_collection_id |
ftdoajarticles |
language |
English |
topic |
megabenthos composition distribution scotia arc islands Aquaculture. Fisheries. Angling SH1-691 |
spellingShingle |
megabenthos composition distribution scotia arc islands Aquaculture. Fisheries. Angling SH1-691 Ana Ramos The megazoobenthos of the Scotia Arc islands |
topic_facet |
megabenthos composition distribution scotia arc islands Aquaculture. Fisheries. Angling SH1-691 |
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. |
format |
Article in Journal/Newspaper |
author |
Ana Ramos |
author_facet |
Ana Ramos |
author_sort |
Ana Ramos |
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://doi.org/10.3989/scimar.1999.63s1171 https://doaj.org/article/ffb571e573ef40409bc546a34ffabd04 |
long_lat |
ENVELOPE(-55.184,-55.184,-61.085,-61.085) 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 Elephant Island Sandwich Islands Shag Rocks South Georgia South Orkney Islands South Sandwich Islands South Shetland Islands The Antarctic |
geographic_facet |
Antarctic Elephant Island Sandwich Islands Shag Rocks South Georgia South Orkney Islands South Sandwich Islands South Shetland Islands The Antarctic |
genre |
Antarc* Antarctic Elephant Island South Orkney Islands South Sandwich Islands South Shetland Islands |
genre_facet |
Antarc* Antarctic Elephant Island South Orkney Islands South Sandwich Islands South Shetland Islands |
op_source |
Scientia Marina, Vol 63, Iss S1, Pp 171-182 (1999) |
op_relation |
http://scientiamarina.revistas.csic.es/index.php/scientiamarina/article/view/901 https://doaj.org/toc/0214-8358 https://doaj.org/toc/1886-8134 0214-8358 1886-8134 doi:10.3989/scimar.1999.63s1171 https://doaj.org/article/ffb571e573ef40409bc546a34ffabd04 |
op_doi |
https://doi.org/10.3989/scimar.1999.63s1171 |
container_title |
Scientia Marina |
container_volume |
63 |
container_issue |
S1 |
container_start_page |
171 |
op_container_end_page |
182 |
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1766271837547790336 |