Climatic influences on deep-sea ostracode (Crustacea) diversity for the last three million years
Ostracodes are small, bivalved crustaceans with the finest-scale fossil resolution of any metazoan, rivaled only by the fossil record of the protistan Foraminifera. This article presents a synthesis of the patterns and possible causes of alpha species diversity variation in benthic deep-sea ostracod...
Published in: | Ecology |
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Ecological Society of America. The Journal's web site is located at http://www.esajournals.org/loi/ecol
2008
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Online Access: | https://doi.org/10.1890/07-1021.1 http://hdl.handle.net/10722/132788 |
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ftunivhongkonghu:oai:hub.hku.hk:10722/132788 2023-05-15T15:15:41+02:00 Climatic influences on deep-sea ostracode (Crustacea) diversity for the last three million years Cronin, TM Yasuhara, M 2008 https://doi.org/10.1890/07-1021.1 http://hdl.handle.net/10722/132788 eng eng Ecological Society of America. The Journal's web site is located at http://www.esajournals.org/loi/ecol United States Ecology http://www.scopus.com/mlt/select.url?eid=2-s2.0-58949088978&selection=ref&src=s&origin=recordpage Ecology, 2008, v. 89 n. 11 SUPPL., p. S53-S65 doi:10.1890/07-1021.1 S65 WOS:000260719000005 0012-9658 11 SUPPL. 19097484 eid_2-s2.0-58949088978 S53 http://hdl.handle.net/10722/132788 89 Ostracoda Paleoclimate Paleoceanography Pliocene Species diversity Quaternary Productivity Deep sea Macroecology Temperature Metazoan benthos Conference_Paper 2008 ftunivhongkonghu https://doi.org/10.1890/07-1021.1 2023-01-14T15:36:33Z Ostracodes are small, bivalved crustaceans with the finest-scale fossil resolution of any metazoan, rivaled only by the fossil record of the protistan Foraminifera. This article presents a synthesis of the patterns and possible causes of alpha species diversity variation in benthic deep-sea ostracodes at drilling sites in the North Atlantic and Arctic Oceans. Taken together, these sites represent a period of great climatic variability covering the past three million years. Sediment cores taken from the Mid-Atlantic Ridge show a positive correlation between warm temperatures and high species diversity. These Mid-Atlantic Ridge cores, at the same latitude as northern Spain, show the same positive correlation during the last two glacial-interglacial cycles (200-0 ka [thousands of years ago]) as they do during the pre-glacial Pliocene 2.85-2.4 Ma (millions of years ago). This positive correlation is also found in Pliocene cores from the Rockall Plateau, at the same latitude as Ireland. During the last 200 thousand years, however, this correlation is reversed in cores taken from both the Rockall and Iceland Plateaus. The discovery of high diversity during colder periods in recent high-latitude Rockall and Iceland cores seems to be explained by spikes in diversity caused by ice-rafting events, which would not affect the lower-latitude Mid-Atlantic Ridge. The Heinrich ice-rafting events reduce North Atlantic surface temperatures and salinity every ∼6-12 ka, dramatically decreasing surface productivity. This increase in diversity during Heinrich events may be explained either by a negative correlation between surface productivity and benthic diversity or by increase in diversity caused by moderate disturbance when ice rafted debris fall to the bottom of the ocean. © 2008 by the Ecological Society of America. link_to_subscribed_fulltext Conference Object Arctic Foraminifera* Iceland North Atlantic University of Hong Kong: HKU Scholars Hub Arctic Mid-Atlantic Ridge Rockall Plateau ENVELOPE(-18.833,-18.833,56.333,56.333) Ecology 89 sp11 S53 S65 |
institution |
Open Polar |
collection |
University of Hong Kong: HKU Scholars Hub |
op_collection_id |
ftunivhongkonghu |
language |
English |
topic |
Ostracoda Paleoclimate Paleoceanography Pliocene Species diversity Quaternary Productivity Deep sea Macroecology Temperature Metazoan benthos |
spellingShingle |
Ostracoda Paleoclimate Paleoceanography Pliocene Species diversity Quaternary Productivity Deep sea Macroecology Temperature Metazoan benthos Cronin, TM Yasuhara, M Climatic influences on deep-sea ostracode (Crustacea) diversity for the last three million years |
topic_facet |
Ostracoda Paleoclimate Paleoceanography Pliocene Species diversity Quaternary Productivity Deep sea Macroecology Temperature Metazoan benthos |
description |
Ostracodes are small, bivalved crustaceans with the finest-scale fossil resolution of any metazoan, rivaled only by the fossil record of the protistan Foraminifera. This article presents a synthesis of the patterns and possible causes of alpha species diversity variation in benthic deep-sea ostracodes at drilling sites in the North Atlantic and Arctic Oceans. Taken together, these sites represent a period of great climatic variability covering the past three million years. Sediment cores taken from the Mid-Atlantic Ridge show a positive correlation between warm temperatures and high species diversity. These Mid-Atlantic Ridge cores, at the same latitude as northern Spain, show the same positive correlation during the last two glacial-interglacial cycles (200-0 ka [thousands of years ago]) as they do during the pre-glacial Pliocene 2.85-2.4 Ma (millions of years ago). This positive correlation is also found in Pliocene cores from the Rockall Plateau, at the same latitude as Ireland. During the last 200 thousand years, however, this correlation is reversed in cores taken from both the Rockall and Iceland Plateaus. The discovery of high diversity during colder periods in recent high-latitude Rockall and Iceland cores seems to be explained by spikes in diversity caused by ice-rafting events, which would not affect the lower-latitude Mid-Atlantic Ridge. The Heinrich ice-rafting events reduce North Atlantic surface temperatures and salinity every ∼6-12 ka, dramatically decreasing surface productivity. This increase in diversity during Heinrich events may be explained either by a negative correlation between surface productivity and benthic diversity or by increase in diversity caused by moderate disturbance when ice rafted debris fall to the bottom of the ocean. © 2008 by the Ecological Society of America. link_to_subscribed_fulltext |
format |
Conference Object |
author |
Cronin, TM Yasuhara, M |
author_facet |
Cronin, TM Yasuhara, M |
author_sort |
Cronin, TM |
title |
Climatic influences on deep-sea ostracode (Crustacea) diversity for the last three million years |
title_short |
Climatic influences on deep-sea ostracode (Crustacea) diversity for the last three million years |
title_full |
Climatic influences on deep-sea ostracode (Crustacea) diversity for the last three million years |
title_fullStr |
Climatic influences on deep-sea ostracode (Crustacea) diversity for the last three million years |
title_full_unstemmed |
Climatic influences on deep-sea ostracode (Crustacea) diversity for the last three million years |
title_sort |
climatic influences on deep-sea ostracode (crustacea) diversity for the last three million years |
publisher |
Ecological Society of America. The Journal's web site is located at http://www.esajournals.org/loi/ecol |
publishDate |
2008 |
url |
https://doi.org/10.1890/07-1021.1 http://hdl.handle.net/10722/132788 |
long_lat |
ENVELOPE(-18.833,-18.833,56.333,56.333) |
geographic |
Arctic Mid-Atlantic Ridge Rockall Plateau |
geographic_facet |
Arctic Mid-Atlantic Ridge Rockall Plateau |
genre |
Arctic Foraminifera* Iceland North Atlantic |
genre_facet |
Arctic Foraminifera* Iceland North Atlantic |
op_relation |
Ecology http://www.scopus.com/mlt/select.url?eid=2-s2.0-58949088978&selection=ref&src=s&origin=recordpage Ecology, 2008, v. 89 n. 11 SUPPL., p. S53-S65 doi:10.1890/07-1021.1 S65 WOS:000260719000005 0012-9658 11 SUPPL. 19097484 eid_2-s2.0-58949088978 S53 http://hdl.handle.net/10722/132788 89 |
op_doi |
https://doi.org/10.1890/07-1021.1 |
container_title |
Ecology |
container_volume |
89 |
container_issue |
sp11 |
container_start_page |
S53 |
op_container_end_page |
S65 |
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1766346029573079040 |