The impact of climate changes during the Holocene on vegetation in northern French Guiana
The impact of climatic changes that occurred during the last glacial maximum and the Holocene on vegetation changes in the Amazon Basin and the Guiana Shield are still widely debated. The aim of our study was to investigate whether major changes in vegetation (i.e. transitions between rainforests an...
| Main Authors: | , , , , |
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| Format: | Journal Article |
| Language: | Inglés |
| Published: |
2010
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| Subjects: | |
| Online Access: | https://hdl.handle.net/10568/20349 |
| _version_ | 1855513788781953024 |
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| author | Freycon, V. Krencker, M. Schwartz, D. Nasi, Robert Bonal, D. |
| author_browse | Bonal, D. Freycon, V. Krencker, M. Nasi, Robert Schwartz, D. |
| author_facet | Freycon, V. Krencker, M. Schwartz, D. Nasi, Robert Bonal, D. |
| author_sort | Freycon, V. |
| collection | Repository of Agricultural Research Outputs (CGSpace) |
| description | The impact of climatic changes that occurred during the last glacial maximum and the Holocene on vegetation changes in the Amazon Basin and the Guiana Shield are still widely debated. The aim of our study was to investigate whether major changes in vegetation (i.e. transitions between rainforests and C4 savannas) occurred in northern French Guiana during the Holocene. We measured variations in the d13C of soil organic matter at eight sites now occupied by forest or savannah. The forest sites were selected to cover two regions (forest refugia and peneplains) which are thought to have experienced different intensities of disturbance during the latest Pleistocene and the Holocene. We found that none of the forest sites underwent major disturbances during the Holocene, i.e. they were not replaced by C4 savannahs or C4 forest savannahs for long periods. Our results thus suggest that tropical rainforests in northern French Guiana were resilient to drier climatic conditions during the Holocene. Nevertheless, geographical and vertical variations in the 13C of SOM were compatible with minor changes in vegetation, variations in soil processes or in soil physical properties. |
| format | Journal Article |
| id | CGSpace20349 |
| institution | CGIAR Consortium |
| language | Inglés |
| publishDate | 2010 |
| publishDateRange | 2010 |
| publishDateSort | 2010 |
| record_format | dspace |
| spelling | CGSpace203492025-01-24T14:11:50Z The impact of climate changes during the Holocene on vegetation in northern French Guiana Freycon, V. Krencker, M. Schwartz, D. Nasi, Robert Bonal, D. vegetation soil organic matter The impact of climatic changes that occurred during the last glacial maximum and the Holocene on vegetation changes in the Amazon Basin and the Guiana Shield are still widely debated. The aim of our study was to investigate whether major changes in vegetation (i.e. transitions between rainforests and C4 savannas) occurred in northern French Guiana during the Holocene. We measured variations in the d13C of soil organic matter at eight sites now occupied by forest or savannah. The forest sites were selected to cover two regions (forest refugia and peneplains) which are thought to have experienced different intensities of disturbance during the latest Pleistocene and the Holocene. We found that none of the forest sites underwent major disturbances during the Holocene, i.e. they were not replaced by C4 savannahs or C4 forest savannahs for long periods. Our results thus suggest that tropical rainforests in northern French Guiana were resilient to drier climatic conditions during the Holocene. Nevertheless, geographical and vertical variations in the 13C of SOM were compatible with minor changes in vegetation, variations in soil processes or in soil physical properties. 2010 2012-06-04T09:13:17Z 2012-06-04T09:13:17Z Journal Article https://hdl.handle.net/10568/20349 en Freycon, V., Krencker, M., Schwartz, D., Nasi, R., Bonal, D. 2010. The impact of climate changes during the Holocene on vegetation in northern French Guiana . Quaternary Research 73 :220-225. ISSN: 0033-5894. |
| spellingShingle | vegetation soil organic matter Freycon, V. Krencker, M. Schwartz, D. Nasi, Robert Bonal, D. The impact of climate changes during the Holocene on vegetation in northern French Guiana |
| title | The impact of climate changes during the Holocene on vegetation in northern French Guiana |
| title_full | The impact of climate changes during the Holocene on vegetation in northern French Guiana |
| title_fullStr | The impact of climate changes during the Holocene on vegetation in northern French Guiana |
| title_full_unstemmed | The impact of climate changes during the Holocene on vegetation in northern French Guiana |
| title_short | The impact of climate changes during the Holocene on vegetation in northern French Guiana |
| title_sort | impact of climate changes during the holocene on vegetation in northern french guiana |
| topic | vegetation soil organic matter |
| url | https://hdl.handle.net/10568/20349 |
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