Late Quaternary Ostracode From a Core in the Weddel Sea, Antartica
Fifty-nine samples from a 560cm gravity core of late Quaternary age (PS1003-2), collected at a depth of 2796m in the Weddell Sea, were examined for Ostracoda. The fauna was sparse but, from a total of 556 valves, the rather low diversity fauna of 19 species belonging to 11 genera and 3 families was...
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Language: | Portuguese |
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Instituto de Geociências /Universidade Federal do Rio Grande do Sul
1999
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Online Access: | https://seer.ufrgs.br/index.php/PesquisasemGeociencias/article/view/21130 |
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ftunivfrgsojs:oai:seer.ufrgs.br:article/21130 2023-07-16T03:52:19+02:00 Late Quaternary Ostracode From a Core in the Weddel Sea, Antartica WHATLEY, ROBIN ROBERTS, RAYMOND 1999-06-30 application/pdf https://seer.ufrgs.br/index.php/PesquisasemGeociencias/article/view/21130 por por Instituto de Geociências /Universidade Federal do Rio Grande do Sul https://seer.ufrgs.br/index.php/PesquisasemGeociencias/article/view/21130/pdf https://seer.ufrgs.br/index.php/PesquisasemGeociencias/article/view/21130 Pesquisas em Geociências; v. 26 n. 1 (1999): Pesquisas; 11-19 1807-9806 1518-2398 Ostracode late Quaternary Weddel Sea Geociências info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion 1999 ftunivfrgsojs 2023-06-25T21:31:55Z Fifty-nine samples from a 560cm gravity core of late Quaternary age (PS1003-2), collected at a depth of 2796m in the Weddell Sea, were examined for Ostracoda. The fauna was sparse but, from a total of 556 valves, the rather low diversity fauna of 19 species belonging to 11 genera and 3 families was identified. The study is principally concerned with species diversity, originations and extinctions, inter-relationships between species and the relationship of the fauna to different water masses. With respect to species diversity and origination/extinction patterns, two distinct phases are apparent: an initial diversification (originations only), followed by a phase of overall stable diversity (originations approximately matched by extinctions). The ostracod fauna is closely comparable to that described by authors as typical of North Atlantic Deep Water but is actually from the Antarctic Bottom Water (AABW). Two of the principal constituent species Henryhowella dasyderma (Brady) and H. asperrima (Ruess) seem to be mutually exclusive within the core. Changes in the fauna through the core seem to be related to climatic cycles. Article in Journal/Newspaper Antarc* Antarctic antartic* North Atlantic Deep Water North Atlantic Weddel Sea Weddell Sea Periódicos Científicos da UFRGS (Universidade Federal do Rio Grande do Sul) Antarctic The Antarctic Weddell Weddell Sea Pesquisas em Geociências 26 1 11 |
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Open Polar |
collection |
Periódicos Científicos da UFRGS (Universidade Federal do Rio Grande do Sul) |
op_collection_id |
ftunivfrgsojs |
language |
Portuguese |
topic |
Ostracode late Quaternary Weddel Sea Geociências |
spellingShingle |
Ostracode late Quaternary Weddel Sea Geociências WHATLEY, ROBIN ROBERTS, RAYMOND Late Quaternary Ostracode From a Core in the Weddel Sea, Antartica |
topic_facet |
Ostracode late Quaternary Weddel Sea Geociências |
description |
Fifty-nine samples from a 560cm gravity core of late Quaternary age (PS1003-2), collected at a depth of 2796m in the Weddell Sea, were examined for Ostracoda. The fauna was sparse but, from a total of 556 valves, the rather low diversity fauna of 19 species belonging to 11 genera and 3 families was identified. The study is principally concerned with species diversity, originations and extinctions, inter-relationships between species and the relationship of the fauna to different water masses. With respect to species diversity and origination/extinction patterns, two distinct phases are apparent: an initial diversification (originations only), followed by a phase of overall stable diversity (originations approximately matched by extinctions). The ostracod fauna is closely comparable to that described by authors as typical of North Atlantic Deep Water but is actually from the Antarctic Bottom Water (AABW). Two of the principal constituent species Henryhowella dasyderma (Brady) and H. asperrima (Ruess) seem to be mutually exclusive within the core. Changes in the fauna through the core seem to be related to climatic cycles. |
format |
Article in Journal/Newspaper |
author |
WHATLEY, ROBIN ROBERTS, RAYMOND |
author_facet |
WHATLEY, ROBIN ROBERTS, RAYMOND |
author_sort |
WHATLEY, ROBIN |
title |
Late Quaternary Ostracode From a Core in the Weddel Sea, Antartica |
title_short |
Late Quaternary Ostracode From a Core in the Weddel Sea, Antartica |
title_full |
Late Quaternary Ostracode From a Core in the Weddel Sea, Antartica |
title_fullStr |
Late Quaternary Ostracode From a Core in the Weddel Sea, Antartica |
title_full_unstemmed |
Late Quaternary Ostracode From a Core in the Weddel Sea, Antartica |
title_sort |
late quaternary ostracode from a core in the weddel sea, antartica |
publisher |
Instituto de Geociências /Universidade Federal do Rio Grande do Sul |
publishDate |
1999 |
url |
https://seer.ufrgs.br/index.php/PesquisasemGeociencias/article/view/21130 |
geographic |
Antarctic The Antarctic Weddell Weddell Sea |
geographic_facet |
Antarctic The Antarctic Weddell Weddell Sea |
genre |
Antarc* Antarctic antartic* North Atlantic Deep Water North Atlantic Weddel Sea Weddell Sea |
genre_facet |
Antarc* Antarctic antartic* North Atlantic Deep Water North Atlantic Weddel Sea Weddell Sea |
op_source |
Pesquisas em Geociências; v. 26 n. 1 (1999): Pesquisas; 11-19 1807-9806 1518-2398 |
op_relation |
https://seer.ufrgs.br/index.php/PesquisasemGeociencias/article/view/21130/pdf https://seer.ufrgs.br/index.php/PesquisasemGeociencias/article/view/21130 |
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Pesquisas em Geociências |
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26 |
container_issue |
1 |
container_start_page |
11 |
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1771545194050617344 |