Early to Middle Eocene vegetation dynamics at the Wilkes Land Margin (Antarctica)
The early Eocene epoch was characterized by extreme global warmth, which in terrestrial settings was characterized by an expansion of near-tropical vegetation belts into the high latitudes. During the middle to late Eocene, global cooling caused the retreat of tropical vegetation to lower latitudes....
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2013
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ftunivutrecht:oai:dspace.library.uu.nl:1874/307318 2023-12-10T09:40:17+01:00 Early to Middle Eocene vegetation dynamics at the Wilkes Land Margin (Antarctica) Contreras, L. Pross, J. Bijl, P.K. Koutsodendris, A. Raine, J.I. van de Schootbrugge, B. Brinkhuis, H. Marine Palynology NWO-NNPP: Reconstructing the evolution and dynamics of the Antarctic cryosphere from Ocean Drilling; a dinoflagellate perspective Marine palynology and palaeoceanography 2013-10-15 application/pdf https://dspace.library.uu.nl/handle/1874/307318 eng eng https://dspace.library.uu.nl/handle/1874/307318 info:eu-repo/semantics/OpenAccess 2013 ftunivutrecht 2023-11-15T23:12:16Z The early Eocene epoch was characterized by extreme global warmth, which in terrestrial settings was characterized by an expansion of near-tropical vegetation belts into the high latitudes. During the middle to late Eocene, global cooling caused the retreat of tropical vegetation to lower latitudes. In high-latitude settings, near-tropical vegetation was replaced by temperate floras. This floral change has recently been traced as far south as Antarctica, where along the Wilkes Land margin paratropical forests thrived during the early Eocene and temperate Nothofagus forests developed during the middle Eocene. Here we provide both qualitative and quantitative palynological data for this floral turnover based on a sporomorph record recovered at Integrated Ocean Drilling Program (IODP) Site U1356 off the Wilkes Land margin. Following the nearest living relative concept and based on a comparison with modern vegetation types, we examine the structure and diversity patterns of the Eocene vegetation along the Wilkes Land margin. Our results indicate that the early Eocene forests along the Wilkes Land margin were characterized by a diverse canopy composed of plants that today occur in tropical settings; their richness pattern was similar to that of present-day forests from New Caledonia. The middle Eocene forests were characterized by a canopy dominated by Nothofagus and exhibited richness patterns similar to modern Nothofagus forests from New Zealand. Other/Unknown Material Antarc* Antarctica Wilkes Land Utrecht University Repository New Zealand Wilkes Land ENVELOPE(120.000,120.000,-69.000,-69.000) |
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Open Polar |
collection |
Utrecht University Repository |
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ftunivutrecht |
language |
English |
description |
The early Eocene epoch was characterized by extreme global warmth, which in terrestrial settings was characterized by an expansion of near-tropical vegetation belts into the high latitudes. During the middle to late Eocene, global cooling caused the retreat of tropical vegetation to lower latitudes. In high-latitude settings, near-tropical vegetation was replaced by temperate floras. This floral change has recently been traced as far south as Antarctica, where along the Wilkes Land margin paratropical forests thrived during the early Eocene and temperate Nothofagus forests developed during the middle Eocene. Here we provide both qualitative and quantitative palynological data for this floral turnover based on a sporomorph record recovered at Integrated Ocean Drilling Program (IODP) Site U1356 off the Wilkes Land margin. Following the nearest living relative concept and based on a comparison with modern vegetation types, we examine the structure and diversity patterns of the Eocene vegetation along the Wilkes Land margin. Our results indicate that the early Eocene forests along the Wilkes Land margin were characterized by a diverse canopy composed of plants that today occur in tropical settings; their richness pattern was similar to that of present-day forests from New Caledonia. The middle Eocene forests were characterized by a canopy dominated by Nothofagus and exhibited richness patterns similar to modern Nothofagus forests from New Zealand. |
author2 |
Marine Palynology NWO-NNPP: Reconstructing the evolution and dynamics of the Antarctic cryosphere from Ocean Drilling; a dinoflagellate perspective Marine palynology and palaeoceanography |
author |
Contreras, L. Pross, J. Bijl, P.K. Koutsodendris, A. Raine, J.I. van de Schootbrugge, B. Brinkhuis, H. |
spellingShingle |
Contreras, L. Pross, J. Bijl, P.K. Koutsodendris, A. Raine, J.I. van de Schootbrugge, B. Brinkhuis, H. Early to Middle Eocene vegetation dynamics at the Wilkes Land Margin (Antarctica) |
author_facet |
Contreras, L. Pross, J. Bijl, P.K. Koutsodendris, A. Raine, J.I. van de Schootbrugge, B. Brinkhuis, H. |
author_sort |
Contreras, L. |
title |
Early to Middle Eocene vegetation dynamics at the Wilkes Land Margin (Antarctica) |
title_short |
Early to Middle Eocene vegetation dynamics at the Wilkes Land Margin (Antarctica) |
title_full |
Early to Middle Eocene vegetation dynamics at the Wilkes Land Margin (Antarctica) |
title_fullStr |
Early to Middle Eocene vegetation dynamics at the Wilkes Land Margin (Antarctica) |
title_full_unstemmed |
Early to Middle Eocene vegetation dynamics at the Wilkes Land Margin (Antarctica) |
title_sort |
early to middle eocene vegetation dynamics at the wilkes land margin (antarctica) |
publishDate |
2013 |
url |
https://dspace.library.uu.nl/handle/1874/307318 |
long_lat |
ENVELOPE(120.000,120.000,-69.000,-69.000) |
geographic |
New Zealand Wilkes Land |
geographic_facet |
New Zealand Wilkes Land |
genre |
Antarc* Antarctica Wilkes Land |
genre_facet |
Antarc* Antarctica Wilkes Land |
op_relation |
https://dspace.library.uu.nl/handle/1874/307318 |
op_rights |
info:eu-repo/semantics/OpenAccess |
_version_ |
1784892552279752704 |