Cenozoic history of Antarctic benthic diatoms
Antarctic Cenozoic climate changes have influenced the development of the Southern Ocean benthic diatom flora. When Antarctica and South America separated in the late Eocene (37 Ma), giving rise to the proto-Antarctic Circumpolar Current (ACC), the environment gradually changed from temperate alpine...
Published in: | Alcheringa: An Australasian Journal of Palaeontology |
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Online Access: | https://doi.org/10.1080/03115510508619565 http://ecite.utas.edu.au/38468 |
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ftunivtasecite:oai:ecite.utas.edu.au:38468 2023-05-15T14:03:55+02:00 Cenozoic history of Antarctic benthic diatoms Whitehead, JM 2005 https://doi.org/10.1080/03115510508619565 http://ecite.utas.edu.au/38468 en eng Geological Society Australia Inc. http://dx.doi.org/10.1080/03115510508619565 http://purl.org/au-research/grants/arc/DP0345161 Whitehead, JM, Cenozoic history of Antarctic benthic diatoms, Alcheringa, 29, (1) pp. 151-169. ISSN 0311-5518 (2005) [Refereed Article] http://ecite.utas.edu.au/38468 Earth Sciences Geology Palaeontology (incl. Palynology) Refereed Article PeerReviewed 2005 ftunivtasecite https://doi.org/10.1080/03115510508619565 2019-12-13T21:16:12Z Antarctic Cenozoic climate changes have influenced the development of the Southern Ocean benthic diatom flora. When Antarctica and South America separated in the late Eocene (37 Ma), giving rise to the proto-Antarctic Circumpolar Current (ACC), the environment gradually changed from temperate alpine glacial to subpolar with ice sheet development. By the early Oligocene (30 Ma), at least thirteen new benthic diatom genera had appeared in the Antarctic. Many of the genera probably migrated from lower latitudes (e.g. New Zealand) prior to the ACC becoming fully established (23 2.5 Ma), which increased the physical separation of Antarctica. Further migration may have occurred during later periods of climate warming, but the Cenozoic was generally a time of progressive climate cooling, and increased glaciation that may have caused diatom extinctions. Some genera became extinct during the late Pliocene and Pleistocene, for example, when glaciers covered much of the Antarctic continental shelf. Many of the benthic diatom genera now extinct in Antarctica still occur in ice-free environments at lower latitudes. Most extant benthic Antarctic diatom taxa are eurytopic and probably survived Cenozoic glaciations by either inhabiting sea-ice or becoming planktic, as sea-floor habitats were restricted. AAP. Article in Journal/Newspaper Antarc* Antarctic Antarctica Ice Sheet Sea ice Southern Ocean eCite UTAS (University of Tasmania) Antarctic New Zealand Southern Ocean The Antarctic Alcheringa: An Australasian Journal of Palaeontology 29 1 151 169 |
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Open Polar |
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eCite UTAS (University of Tasmania) |
op_collection_id |
ftunivtasecite |
language |
English |
topic |
Earth Sciences Geology Palaeontology (incl. Palynology) |
spellingShingle |
Earth Sciences Geology Palaeontology (incl. Palynology) Whitehead, JM Cenozoic history of Antarctic benthic diatoms |
topic_facet |
Earth Sciences Geology Palaeontology (incl. Palynology) |
description |
Antarctic Cenozoic climate changes have influenced the development of the Southern Ocean benthic diatom flora. When Antarctica and South America separated in the late Eocene (37 Ma), giving rise to the proto-Antarctic Circumpolar Current (ACC), the environment gradually changed from temperate alpine glacial to subpolar with ice sheet development. By the early Oligocene (30 Ma), at least thirteen new benthic diatom genera had appeared in the Antarctic. Many of the genera probably migrated from lower latitudes (e.g. New Zealand) prior to the ACC becoming fully established (23 2.5 Ma), which increased the physical separation of Antarctica. Further migration may have occurred during later periods of climate warming, but the Cenozoic was generally a time of progressive climate cooling, and increased glaciation that may have caused diatom extinctions. Some genera became extinct during the late Pliocene and Pleistocene, for example, when glaciers covered much of the Antarctic continental shelf. Many of the benthic diatom genera now extinct in Antarctica still occur in ice-free environments at lower latitudes. Most extant benthic Antarctic diatom taxa are eurytopic and probably survived Cenozoic glaciations by either inhabiting sea-ice or becoming planktic, as sea-floor habitats were restricted. AAP. |
format |
Article in Journal/Newspaper |
author |
Whitehead, JM |
author_facet |
Whitehead, JM |
author_sort |
Whitehead, JM |
title |
Cenozoic history of Antarctic benthic diatoms |
title_short |
Cenozoic history of Antarctic benthic diatoms |
title_full |
Cenozoic history of Antarctic benthic diatoms |
title_fullStr |
Cenozoic history of Antarctic benthic diatoms |
title_full_unstemmed |
Cenozoic history of Antarctic benthic diatoms |
title_sort |
cenozoic history of antarctic benthic diatoms |
publisher |
Geological Society Australia Inc. |
publishDate |
2005 |
url |
https://doi.org/10.1080/03115510508619565 http://ecite.utas.edu.au/38468 |
geographic |
Antarctic New Zealand Southern Ocean The Antarctic |
geographic_facet |
Antarctic New Zealand Southern Ocean The Antarctic |
genre |
Antarc* Antarctic Antarctica Ice Sheet Sea ice Southern Ocean |
genre_facet |
Antarc* Antarctic Antarctica Ice Sheet Sea ice Southern Ocean |
op_relation |
http://dx.doi.org/10.1080/03115510508619565 http://purl.org/au-research/grants/arc/DP0345161 Whitehead, JM, Cenozoic history of Antarctic benthic diatoms, Alcheringa, 29, (1) pp. 151-169. ISSN 0311-5518 (2005) [Refereed Article] http://ecite.utas.edu.au/38468 |
op_doi |
https://doi.org/10.1080/03115510508619565 |
container_title |
Alcheringa: An Australasian Journal of Palaeontology |
container_volume |
29 |
container_issue |
1 |
container_start_page |
151 |
op_container_end_page |
169 |
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1766274793806495744 |