Meiofauna communities from the Straits of Magellan and the Beagle Channel
Meiofauna from 20 stations (ranging between 8 and 550 m) in the Magellan Straits and the Beagle Channel revealed 28 small sized taxa of higher categories including the temporary meiofauna. Nematoda, Copepoda Harpacticoidea and Polychaeta occurred in all samples; Turbellaria, Bivalvia, Kinorhyncha an...
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Consejo Superior de Investigaciones Científicas
1999
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ftdoajarticles:oai:doaj.org/article:b481d42ff69b44449843d38b756338b7 2023-05-15T13:40:37+02:00 Meiofauna communities from the Straits of Magellan and the Beagle Channel G. C. Chen R. L. Herman M. Vincx 1999-12-01T00:00:00Z https://doi.org/10.3989/scimar.1999.63s1123 https://doaj.org/article/b481d42ff69b44449843d38b756338b7 EN eng Consejo Superior de Investigaciones Científicas http://scientiamarina.revistas.csic.es/index.php/scientiamarina/article/view/895 https://doaj.org/toc/0214-8358 https://doaj.org/toc/1886-8134 0214-8358 1886-8134 doi:10.3989/scimar.1999.63s1123 https://doaj.org/article/b481d42ff69b44449843d38b756338b7 Scientia Marina, Vol 63, Iss S1, Pp 123-132 (1999) meiofauna density community straits of magellan beagle channel antarctic Aquaculture. Fisheries. Angling SH1-691 article 1999 ftdoajarticles https://doi.org/10.3989/scimar.1999.63s1123 2022-12-31T13:51:48Z Meiofauna from 20 stations (ranging between 8 and 550 m) in the Magellan Straits and the Beagle Channel revealed 28 small sized taxa of higher categories including the temporary meiofauna. Nematoda, Copepoda Harpacticoidea and Polychaeta occurred in all samples; Turbellaria, Bivalvia, Kinorhyncha and Ostracoda were regularly present. Nematodes represented between 68% and 94% of the meiofauna at each station, followed by the copepods (2.3% to 14.5%) and polychaetes (1.1% to 11.5%). Maximal total density, 9700 individuals 10 cm-2, was found in the surroundings of Picton Island, while the mean abundance per station was 3374 individuals 10 cm-2. The vertical pattern within the sediment showed that 87% of meiofauna components concentrated in the upper 0-5 cm sediment layers and 13% in the lower ( > 5cm) layers. More than 95% of copepods, as well as the temporary meiofauna occurred in the top 5 cm layers. The proportion of nematodes and copepods shows opposite trends in the vertical distribution. Multivariate analysis using the total density and the 10 `true´ meiofauna taxa densities discriminates between communities in the Straits of Magellan and the Beagle Channel area. Meiofaunal density was much higher in the Beagle Channel, but the diversity was lower than that in the Straits of Magellan. The Southern Magellan meiofauna communities are compared with those found at the Antarctic Peninsula and in the Weddell Sea (high Antarctic). It is considered that hydrodynamic features (tidal currents with strong winds), geographical characteristics, together with sediment composition are the key parameters structuring the meiofauna community in the Straits of Magellan and in the Beagle Channel. Article in Journal/Newspaper Antarc* Antarctic Antarctic Peninsula Weddell Sea Copepods Directory of Open Access Journals: DOAJ Articles Antarctic The Antarctic Antarctic Peninsula Weddell Sea Weddell Scientia Marina 63 S1 123 132 |
institution |
Open Polar |
collection |
Directory of Open Access Journals: DOAJ Articles |
op_collection_id |
ftdoajarticles |
language |
English |
topic |
meiofauna density community straits of magellan beagle channel antarctic Aquaculture. Fisheries. Angling SH1-691 |
spellingShingle |
meiofauna density community straits of magellan beagle channel antarctic Aquaculture. Fisheries. Angling SH1-691 G. C. Chen R. L. Herman M. Vincx Meiofauna communities from the Straits of Magellan and the Beagle Channel |
topic_facet |
meiofauna density community straits of magellan beagle channel antarctic Aquaculture. Fisheries. Angling SH1-691 |
description |
Meiofauna from 20 stations (ranging between 8 and 550 m) in the Magellan Straits and the Beagle Channel revealed 28 small sized taxa of higher categories including the temporary meiofauna. Nematoda, Copepoda Harpacticoidea and Polychaeta occurred in all samples; Turbellaria, Bivalvia, Kinorhyncha and Ostracoda were regularly present. Nematodes represented between 68% and 94% of the meiofauna at each station, followed by the copepods (2.3% to 14.5%) and polychaetes (1.1% to 11.5%). Maximal total density, 9700 individuals 10 cm-2, was found in the surroundings of Picton Island, while the mean abundance per station was 3374 individuals 10 cm-2. The vertical pattern within the sediment showed that 87% of meiofauna components concentrated in the upper 0-5 cm sediment layers and 13% in the lower ( > 5cm) layers. More than 95% of copepods, as well as the temporary meiofauna occurred in the top 5 cm layers. The proportion of nematodes and copepods shows opposite trends in the vertical distribution. Multivariate analysis using the total density and the 10 `true´ meiofauna taxa densities discriminates between communities in the Straits of Magellan and the Beagle Channel area. Meiofaunal density was much higher in the Beagle Channel, but the diversity was lower than that in the Straits of Magellan. The Southern Magellan meiofauna communities are compared with those found at the Antarctic Peninsula and in the Weddell Sea (high Antarctic). It is considered that hydrodynamic features (tidal currents with strong winds), geographical characteristics, together with sediment composition are the key parameters structuring the meiofauna community in the Straits of Magellan and in the Beagle Channel. |
format |
Article in Journal/Newspaper |
author |
G. C. Chen R. L. Herman M. Vincx |
author_facet |
G. C. Chen R. L. Herman M. Vincx |
author_sort |
G. C. Chen |
title |
Meiofauna communities from the Straits of Magellan and the Beagle Channel |
title_short |
Meiofauna communities from the Straits of Magellan and the Beagle Channel |
title_full |
Meiofauna communities from the Straits of Magellan and the Beagle Channel |
title_fullStr |
Meiofauna communities from the Straits of Magellan and the Beagle Channel |
title_full_unstemmed |
Meiofauna communities from the Straits of Magellan and the Beagle Channel |
title_sort |
meiofauna communities from the straits of magellan and the beagle channel |
publisher |
Consejo Superior de Investigaciones Científicas |
publishDate |
1999 |
url |
https://doi.org/10.3989/scimar.1999.63s1123 https://doaj.org/article/b481d42ff69b44449843d38b756338b7 |
geographic |
Antarctic The Antarctic Antarctic Peninsula Weddell Sea Weddell |
geographic_facet |
Antarctic The Antarctic Antarctic Peninsula Weddell Sea Weddell |
genre |
Antarc* Antarctic Antarctic Peninsula Weddell Sea Copepods |
genre_facet |
Antarc* Antarctic Antarctic Peninsula Weddell Sea Copepods |
op_source |
Scientia Marina, Vol 63, Iss S1, Pp 123-132 (1999) |
op_relation |
http://scientiamarina.revistas.csic.es/index.php/scientiamarina/article/view/895 https://doaj.org/toc/0214-8358 https://doaj.org/toc/1886-8134 0214-8358 1886-8134 doi:10.3989/scimar.1999.63s1123 https://doaj.org/article/b481d42ff69b44449843d38b756338b7 |
op_doi |
https://doi.org/10.3989/scimar.1999.63s1123 |
container_title |
Scientia Marina |
container_volume |
63 |
container_issue |
S1 |
container_start_page |
123 |
op_container_end_page |
132 |
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1766137645917798400 |