Pollen analysis and age model of sediment core GIK-16856-2
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| Format: | Dataset Open Access |
| Sprache: | en |
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PANGAEA
1996
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| _version_ | 1867170461725491200 |
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| author | Dupont, Lydie M Weinelt, Mara |
| author_facet | Dupont, Lydie M Weinelt, Mara |
| collection | Datos científicos de ciencias marinas y ambientales |
| contents | Pollen and spores from a deep-sea core located west of the Niger Delta record an uninterrupted area of lowland rain forest in West Africa from Guinea to Cameroon during the last Interglacial and the early Holocene. During other periods of the last 150 ka, a savanna corridor between the western -- Guinean -- and the eastern -- Congolian -- part of the African lowland rain forest existed. This so-called Dahomey Gap had its largest extension during Glacial Stages 6, 4, 3, and 2. Reduced surface salinity in the eastern Gulf of Guinea as recorded by dinoflagellate cysts indicates sufficient precipitation for extensive forest growth during Stages 5 and 1. The large modern extension of dry forest and savanna in West Africa cannot be solely explained by climatic factors. Mangrove expansion in and west of the Niger Delta was largest during the phases of sea-level rise of Stages 5 and 1. During Stages 6, 4, 3, and 2, shelf areas were exposed and the area of the mangrove swamps was minimal. |
| format | Dataset Open Access |
| id | pangaea_https___doi_org_10_1594_PANGAEA_776472 |
| institution | PANGAEA |
| language | en |
| publishDate | 1996 |
| publisher | PANGAEA |
| record_format | pangaea |
| spellingShingle | Pollen analysis and age model of sediment core GIK-16856-2 Dupont, Lydie M Weinelt, Mara GIK/IfG; GIK16856-2; Institute for Geosciences, Christian Albrechts University, Kiel; KOL; M6/5; Meteor (1986); off Nigeria; Piston corer (Kiel type) Pollen and spores from a deep-sea core located west of the Niger Delta record an uninterrupted area of lowland rain forest in West Africa from Guinea to Cameroon during the last Interglacial and the early Holocene. During other periods of the last 150 ka, a savanna corridor between the western -- Guinean -- and the eastern -- Congolian -- part of the African lowland rain forest existed. This so-called Dahomey Gap had its largest extension during Glacial Stages 6, 4, 3, and 2. Reduced surface salinity in the eastern Gulf of Guinea as recorded by dinoflagellate cysts indicates sufficient precipitation for extensive forest growth during Stages 5 and 1. The large modern extension of dry forest and savanna in West Africa cannot be solely explained by climatic factors. Mangrove expansion in and west of the Niger Delta was largest during the phases of sea-level rise of Stages 5 and 1. During Stages 6, 4, 3, and 2, shelf areas were exposed and the area of the mangrove swamps was minimal. |
| title | Pollen analysis and age model of sediment core GIK-16856-2 |
| topic | GIK/IfG; GIK16856-2; Institute for Geosciences, Christian Albrechts University, Kiel; KOL; M6/5; Meteor (1986); off Nigeria; Piston corer (Kiel type) |
| url | https://doi.org/10.1594/PANGAEA.776472 |