Knowledge Resource Center for Ecological Environment in Arid Area
DOI | 10.1016/j.crte.2009.06.007 |
Plant migration and plant communities at the time of the "green Sahara" | |
Watrin, Julie1; Lezine, Anne-Marie1; Hely, Christelle2; Cour, P.; Ballouche, D. Duzer; Elenga, A.; Fredoux, A.; Guinet, P.; Jahns, S.; Kadomura, H.; Maley, J.; Mercuri, A. M.; Pons, I. A.; Reynaud-Farrera, I.; Ritchie, J. C.; Salzmann, U.; Schulz, E.; Tossou, M. G.; Vincens, A.; Waller, M. P. | |
通讯作者 | Watrin, Julie |
来源期刊 | COMPTES RENDUS GEOSCIENCE
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ISSN | 1631-0713 |
出版年 | 2009 |
卷号 | 341期号:8-9页码:656-670 |
英文摘要 | Around 8500 cal years BP, at the time of the maximum of the African Humid Period, lakes and wetlands expanded in the present-day Sahara while large paleodrainages were formed or re-actived, in response to an orbitally-induced increase in monsoon rainfall. It has been suggested that the direct consequence of this increase in rainfall was the northward displacement of the Sahara/Sahel boundary, thought to have reached 23 degrees N in central and eastern Africa. Here, we show a more complex situation characterized by an increase in biodiversity as the desert accommodated more humid-adapted species from tropical forests and wooded grasslands: tropical plant species now found some 400 to 500 km to the south probably entered the desert as gallery-forest formations along rivers and lakes where they benefited from permanent fresh water. At the same time, Saharan trees and shrubs persisted, giving rise to a vegetation that has no analogue today. In this article, we present distribution maps of selected plant species to show both the amplitude of the vegetation change compared to the present and the composition of the past plant communities. We also estimate the migration rate of tropical plant taxa. to their northernmost position in the Sahara. This study is based on the use of several data sets: a data set of the modern plant distribution in northern Africa and a data set of modem and fossil pollen sites (from the African Pollen Database, http://fpd.mediasfrance.org/ and http://medias.obs-mip.fr/apd/). To cite this article: J. Watrin et al., C R. Geoscience 341 (2009). (C) 2009 Published by Elsevier Masson SAS on behalf of Academie des sciences. |
英文关键词 | West Africa Fossil pollen Biodiversity Migration rates Holocene Green Sahara |
类型 | Article |
语种 | 英语 |
国家 | France |
收录类别 | SCI-E |
WOS记录号 | WOS:000271777700009 |
WOS关键词 | LATE-QUATERNARY VEGETATION ; MODELING INTERCOMPARISON PROJECT ; HOLOCENE VEGETATION ; EQUATORIAL AFRICA ; EASTERN SAHARA ; NE-NIGERIA ; NORTHEAST NIGERIA ; CLIMATIC CHANGES ; MONSOON CHANGES ; POLLEN EVIDENCE |
WOS类目 | Geosciences, Multidisciplinary |
WOS研究方向 | Geology |
来源机构 | French National Research Institute for Sustainable Development |
资源类型 | 期刊论文 |
条目标识符 | http://119.78.100.177/qdio/handle/2XILL650/160220 |
作者单位 | 1.CEA, UMR 1752, CNRS, Lab Sci Climat & Environm, F-91191 Gif Sur Yvette, France; 2.Univ Aix Marseille, CNRS, CDF,IRD, Ctr Europeen Rech & Enseignement Geosci Environm, F-13545 Aix En Provence 04, France |
推荐引用方式 GB/T 7714 | Watrin, Julie,Lezine, Anne-Marie,Hely, Christelle,et al. Plant migration and plant communities at the time of the "green Sahara"[J]. French National Research Institute for Sustainable Development,2009,341(8-9):656-670. |
APA | Watrin, Julie.,Lezine, Anne-Marie.,Hely, Christelle.,Cour, P..,Ballouche, D. Duzer.,...&Waller, M. P..(2009).Plant migration and plant communities at the time of the "green Sahara".COMPTES RENDUS GEOSCIENCE,341(8-9),656-670. |
MLA | Watrin, Julie,et al."Plant migration and plant communities at the time of the "green Sahara"".COMPTES RENDUS GEOSCIENCE 341.8-9(2009):656-670. |
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