The origin of modern oceanic foraminiferal faunas and Neogene climate change
Planktonic and benthic foraminifera are the most significant providers of information on the state of surface and deep oceans in the past. Many foraminiferal proxies rely on the knowledge of ecological preferences of individual species and the assumption that these remained similar through time. Con...
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ftoceanrep:oai:oceanrep.geomar.de:3376 2024-09-15T17:42:33+00:00 The origin of modern oceanic foraminiferal faunas and Neogene climate change Kucera, M. Schönfeld, Joachim Williams, M. Haywood, A. M. Gregory, J. Schmidt, D. N. 2007 https://oceanrep.geomar.de/id/eprint/3376/ unknown Geological Society Publishing House Kucera, M. and Schönfeld, J. (2007) The origin of modern oceanic foraminiferal faunas and Neogene climate change. In: Deep-Time Perspectives on Climate Change: Marrying the Signal from Computer Models and Biological Proxies. , ed. by Williams, M., Haywood, A. M., Gregory, J. and Schmidt, D. N. The Micropalaeontological Society Special Publications . Geological Society Publishing House, London, pp. 409-425. ISBN 978-1-86239-240-3 info:eu-repo/semantics/closedAccess Book chapter PeerReviewed 2007 ftoceanrep 2024-09-04T05:04:40Z Planktonic and benthic foraminifera are the most significant providers of information on the state of surface and deep oceans in the past. Many foraminiferal proxies rely on the knowledge of ecological preferences of individual species and the assumption that these remained similar through time. Consequently, the applicability of such proxies is limited in time by the extent of the modern fauna. By analysing extensive datasets of species occurrences, we show that the modern oceanic foraminifer fauna originated during the Neogene. This occurred during two distinct diversification pulses: one in the Middle Miocene (17–14 Ma) and the second at the Miocene/Pliocene transition (7–4 Ma). The first diversification coincides with the time of a major change in the frequency of the dominant climate cycles during the Miocene Climatic Optimum. The environmental driver of the second diversification could be related to an increased provincialism induced by the closure of the Panama Seaway, but the exact link is not clear, particularly for the plankton. Surprisingly, major changes of ocean circulation due to the growth of Antarctic ice-sheet and closure of low-latitude seaways appear to have caused mainly extinctions. Given the age of the latest diversification and extinction pulses that shaped the modern foraminiferal fauna, we conclude that calibrated proxies based on assemblage properties should not be interpreted quantitatively in sediments older than the late Pliocene. Book Part Antarc* Antarctic Ice Sheet OceanRep (GEOMAR Helmholtz Centre für Ocean Research Kiel) |
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OceanRep (GEOMAR Helmholtz Centre für Ocean Research Kiel) |
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ftoceanrep |
language |
unknown |
description |
Planktonic and benthic foraminifera are the most significant providers of information on the state of surface and deep oceans in the past. Many foraminiferal proxies rely on the knowledge of ecological preferences of individual species and the assumption that these remained similar through time. Consequently, the applicability of such proxies is limited in time by the extent of the modern fauna. By analysing extensive datasets of species occurrences, we show that the modern oceanic foraminifer fauna originated during the Neogene. This occurred during two distinct diversification pulses: one in the Middle Miocene (17–14 Ma) and the second at the Miocene/Pliocene transition (7–4 Ma). The first diversification coincides with the time of a major change in the frequency of the dominant climate cycles during the Miocene Climatic Optimum. The environmental driver of the second diversification could be related to an increased provincialism induced by the closure of the Panama Seaway, but the exact link is not clear, particularly for the plankton. Surprisingly, major changes of ocean circulation due to the growth of Antarctic ice-sheet and closure of low-latitude seaways appear to have caused mainly extinctions. Given the age of the latest diversification and extinction pulses that shaped the modern foraminiferal fauna, we conclude that calibrated proxies based on assemblage properties should not be interpreted quantitatively in sediments older than the late Pliocene. |
author2 |
Williams, M. Haywood, A. M. Gregory, J. Schmidt, D. N. |
format |
Book Part |
author |
Kucera, M. Schönfeld, Joachim |
spellingShingle |
Kucera, M. Schönfeld, Joachim The origin of modern oceanic foraminiferal faunas and Neogene climate change |
author_facet |
Kucera, M. Schönfeld, Joachim |
author_sort |
Kucera, M. |
title |
The origin of modern oceanic foraminiferal faunas and Neogene climate change |
title_short |
The origin of modern oceanic foraminiferal faunas and Neogene climate change |
title_full |
The origin of modern oceanic foraminiferal faunas and Neogene climate change |
title_fullStr |
The origin of modern oceanic foraminiferal faunas and Neogene climate change |
title_full_unstemmed |
The origin of modern oceanic foraminiferal faunas and Neogene climate change |
title_sort |
origin of modern oceanic foraminiferal faunas and neogene climate change |
publisher |
Geological Society Publishing House |
publishDate |
2007 |
url |
https://oceanrep.geomar.de/id/eprint/3376/ |
genre |
Antarc* Antarctic Ice Sheet |
genre_facet |
Antarc* Antarctic Ice Sheet |
op_relation |
Kucera, M. and Schönfeld, J. (2007) The origin of modern oceanic foraminiferal faunas and Neogene climate change. In: Deep-Time Perspectives on Climate Change: Marrying the Signal from Computer Models and Biological Proxies. , ed. by Williams, M., Haywood, A. M., Gregory, J. and Schmidt, D. N. The Micropalaeontological Society Special Publications . Geological Society Publishing House, London, pp. 409-425. ISBN 978-1-86239-240-3 |
op_rights |
info:eu-repo/semantics/closedAccess |
_version_ |
1810489165669728256 |