Changes in calcareous nannoplankton assemblages around the Eocene-Oligocene climate transition in the Hungarian Palaeogene Basin (Central Paratethys)
The Eocene-Oligocene climate transition (EOT) is the last major greenhouse-icehouse climate state shift in Earth history, ending the warm, ice-free early Palaeogene world and ushering in the Antarctic glaciation. This study is focused on the Hungarian Palaeogene Basin within the Central Paratethys,...
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Online Access: | http://hdl.handle.net/10831/78022 https://doi.org/10.1080/08912963.2019.1705295 |
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fteotvoslorandun:oai:edit.elte.hu:10831/78022 2024-06-23T07:46:36+00:00 Changes in calcareous nannoplankton assemblages around the Eocene-Oligocene climate transition in the Hungarian Palaeogene Basin (Central Paratethys) Nyerges, A Kocsis, ÁT. Pálfy, J 2020 application/pdf http://hdl.handle.net/10831/78022 https://doi.org/10.1080/08912963.2019.1705295 unknown http://hdl.handle.net/10831/78022 doi:10.1080/08912963.2019.1705295 elte:000506339600001 elte:85077874264 elte:31133143 elte:9 elte:HIST BIOL elte:HISTORICAL BIOLOGY elte:33 elte:10019782 LOMS: https://edit.elte.hu/xmlui/bitstream/10831/78022/1/Nyerges2020.pdf info:eu-repo/semantics/openAccess info:eu-repo/semantics/article 2020 fteotvoslorandun https://doi.org/10.1080/08912963.2019.1705295 2024-06-04T14:10:29Z The Eocene-Oligocene climate transition (EOT) is the last major greenhouse-icehouse climate state shift in Earth history, ending the warm, ice-free early Palaeogene world and ushering in the Antarctic glaciation. This study is focused on the Hungarian Palaeogene Basin within the Central Paratethys, aiming to characterise the effect of the global cooling event in the calcareous nannoplankton assemblages and to reconstruct the palaeoenvironmental evolution of the region. Calcareous nannoplankton biostratigraphy is focused on documenting the NP21 Zone. Hierarchical cluster analysis allowed us to distinguish five successive assemblages. Thereby defined phases are compared with recently published trends in delta O-18 values and foraminiferal changes. Taxa with a preference for oligotrophic and warm surface waters dominate the lowest assemblage. The next assemblage contains taxa that indicate oligotrophic conditions but temperate surface water at the onset of the EOT. Nannoplankton abundance drops to a minimum in the third phase, when taxa adapted to cool surface waters gradually became dominant. A gradual rebound of nannoplankton abundance is observed in the fourth phase, possibly reflecting regional climate change related to the uplifting Alpine chain. After the end of the EOT, the youngest assemblage includes mostly eurytopic taxa which could tolerate an increased rate of freshwater and terrestrial influx. Article in Journal/Newspaper Antarc* Antarctic Eötvös Loránd University: ELTE Digital Institutional Repository (EDIT) Antarctic The Antarctic Historical Biology 33 9 1443 1456 |
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Open Polar |
collection |
Eötvös Loránd University: ELTE Digital Institutional Repository (EDIT) |
op_collection_id |
fteotvoslorandun |
language |
unknown |
description |
The Eocene-Oligocene climate transition (EOT) is the last major greenhouse-icehouse climate state shift in Earth history, ending the warm, ice-free early Palaeogene world and ushering in the Antarctic glaciation. This study is focused on the Hungarian Palaeogene Basin within the Central Paratethys, aiming to characterise the effect of the global cooling event in the calcareous nannoplankton assemblages and to reconstruct the palaeoenvironmental evolution of the region. Calcareous nannoplankton biostratigraphy is focused on documenting the NP21 Zone. Hierarchical cluster analysis allowed us to distinguish five successive assemblages. Thereby defined phases are compared with recently published trends in delta O-18 values and foraminiferal changes. Taxa with a preference for oligotrophic and warm surface waters dominate the lowest assemblage. The next assemblage contains taxa that indicate oligotrophic conditions but temperate surface water at the onset of the EOT. Nannoplankton abundance drops to a minimum in the third phase, when taxa adapted to cool surface waters gradually became dominant. A gradual rebound of nannoplankton abundance is observed in the fourth phase, possibly reflecting regional climate change related to the uplifting Alpine chain. After the end of the EOT, the youngest assemblage includes mostly eurytopic taxa which could tolerate an increased rate of freshwater and terrestrial influx. |
format |
Article in Journal/Newspaper |
author |
Nyerges, A Kocsis, ÁT. Pálfy, J |
spellingShingle |
Nyerges, A Kocsis, ÁT. Pálfy, J Changes in calcareous nannoplankton assemblages around the Eocene-Oligocene climate transition in the Hungarian Palaeogene Basin (Central Paratethys) |
author_facet |
Nyerges, A Kocsis, ÁT. Pálfy, J |
author_sort |
Nyerges, A |
title |
Changes in calcareous nannoplankton assemblages around the Eocene-Oligocene climate transition in the Hungarian Palaeogene Basin (Central Paratethys) |
title_short |
Changes in calcareous nannoplankton assemblages around the Eocene-Oligocene climate transition in the Hungarian Palaeogene Basin (Central Paratethys) |
title_full |
Changes in calcareous nannoplankton assemblages around the Eocene-Oligocene climate transition in the Hungarian Palaeogene Basin (Central Paratethys) |
title_fullStr |
Changes in calcareous nannoplankton assemblages around the Eocene-Oligocene climate transition in the Hungarian Palaeogene Basin (Central Paratethys) |
title_full_unstemmed |
Changes in calcareous nannoplankton assemblages around the Eocene-Oligocene climate transition in the Hungarian Palaeogene Basin (Central Paratethys) |
title_sort |
changes in calcareous nannoplankton assemblages around the eocene-oligocene climate transition in the hungarian palaeogene basin (central paratethys) |
publishDate |
2020 |
url |
http://hdl.handle.net/10831/78022 https://doi.org/10.1080/08912963.2019.1705295 |
geographic |
Antarctic The Antarctic |
geographic_facet |
Antarctic The Antarctic |
genre |
Antarc* Antarctic |
genre_facet |
Antarc* Antarctic |
op_relation |
http://hdl.handle.net/10831/78022 doi:10.1080/08912963.2019.1705295 elte:000506339600001 elte:85077874264 elte:31133143 elte:9 elte:HIST BIOL elte:HISTORICAL BIOLOGY elte:33 elte:10019782 LOMS: https://edit.elte.hu/xmlui/bitstream/10831/78022/1/Nyerges2020.pdf |
op_rights |
info:eu-repo/semantics/openAccess |
op_doi |
https://doi.org/10.1080/08912963.2019.1705295 |
container_title |
Historical Biology |
container_volume |
33 |
container_issue |
9 |
container_start_page |
1443 |
op_container_end_page |
1456 |
_version_ |
1802646969710018560 |