Deep-Sea Biodiversity Response to Abrupt Climate Changes for the Last 20,000 Years
Session 28: Exceptional Records: Evolution and ecology of microfossils High-resolution records of microfossil assemblages from deep-sea sediment cores covering the last 20,000 years in the North Atlantic Ocean were investigated to understand biodiversity dynamics over decadal–centennial timescales....
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ftunivhongkonghu:oai:hub.hku.hk:10722/197753 2023-05-15T17:32:44+02:00 Deep-Sea Biodiversity Response to Abrupt Climate Changes for the Last 20,000 Years Yasuhara, M 2014 http://hdl.handle.net/10722/197753 eng eng Paleontological Society. United States The Paleontological Society. Papers The 10th North American Paleontological Convention (NAPC), Florida, USA, 15-18 February 2014. In the Paleontological Society. Papers (Special Publication), 2014, v. 13, p. 140, abstract no. Session 28-15 140, abstract no. Session 28-15 228853 1089-3326 http://hdl.handle.net/10722/197753 13 Conference_Paper 2014 ftunivhongkonghu 2023-01-14T16:01:43Z Session 28: Exceptional Records: Evolution and ecology of microfossils High-resolution records of microfossil assemblages from deep-sea sediment cores covering the last 20,000 years in the North Atlantic Ocean were investigated to understand biodiversity dynamics over decadal–centennial timescales. The results show pervasive control of deep-sea benthic species diversity by rapidly changing climate. Species diversity rapidly increased during abrupt stadial events during the last deglacial and the Holocene interglacial periods. These included the well-known Heinrich 1, the Younger Dryas, and the 8.2 ka events when the strength of Atlantic Meridional Overturning Circulation (AMOC) decreased. In addition, there is evidence for quasi-cyclic changes in biodiversity at a 1500-year periodicity. Statistical analyses revealed that AMOC-driven bottom-water temperature variability is a primary influence on deep-sea biodiversity. Our results based on the exceptionally highly resolved fossil records highlight possible pervasive, synchronous, and sudden ecosystem response to humaninduced climate and ocean-circulation changes in this century. Conference Object North Atlantic University of Hong Kong: HKU Scholars Hub |
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University of Hong Kong: HKU Scholars Hub |
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ftunivhongkonghu |
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English |
description |
Session 28: Exceptional Records: Evolution and ecology of microfossils High-resolution records of microfossil assemblages from deep-sea sediment cores covering the last 20,000 years in the North Atlantic Ocean were investigated to understand biodiversity dynamics over decadal–centennial timescales. The results show pervasive control of deep-sea benthic species diversity by rapidly changing climate. Species diversity rapidly increased during abrupt stadial events during the last deglacial and the Holocene interglacial periods. These included the well-known Heinrich 1, the Younger Dryas, and the 8.2 ka events when the strength of Atlantic Meridional Overturning Circulation (AMOC) decreased. In addition, there is evidence for quasi-cyclic changes in biodiversity at a 1500-year periodicity. Statistical analyses revealed that AMOC-driven bottom-water temperature variability is a primary influence on deep-sea biodiversity. Our results based on the exceptionally highly resolved fossil records highlight possible pervasive, synchronous, and sudden ecosystem response to humaninduced climate and ocean-circulation changes in this century. |
format |
Conference Object |
author |
Yasuhara, M |
spellingShingle |
Yasuhara, M Deep-Sea Biodiversity Response to Abrupt Climate Changes for the Last 20,000 Years |
author_facet |
Yasuhara, M |
author_sort |
Yasuhara, M |
title |
Deep-Sea Biodiversity Response to Abrupt Climate Changes for the Last 20,000 Years |
title_short |
Deep-Sea Biodiversity Response to Abrupt Climate Changes for the Last 20,000 Years |
title_full |
Deep-Sea Biodiversity Response to Abrupt Climate Changes for the Last 20,000 Years |
title_fullStr |
Deep-Sea Biodiversity Response to Abrupt Climate Changes for the Last 20,000 Years |
title_full_unstemmed |
Deep-Sea Biodiversity Response to Abrupt Climate Changes for the Last 20,000 Years |
title_sort |
deep-sea biodiversity response to abrupt climate changes for the last 20,000 years |
publisher |
Paleontological Society. |
publishDate |
2014 |
url |
http://hdl.handle.net/10722/197753 |
genre |
North Atlantic |
genre_facet |
North Atlantic |
op_relation |
The Paleontological Society. Papers The 10th North American Paleontological Convention (NAPC), Florida, USA, 15-18 February 2014. In the Paleontological Society. Papers (Special Publication), 2014, v. 13, p. 140, abstract no. Session 28-15 140, abstract no. Session 28-15 228853 1089-3326 http://hdl.handle.net/10722/197753 13 |
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1766130986472439808 |