期刊名称：Science et changements planétaires / Sécheresse
印刷版ISSN：1147-7806
电子版ISSN：1777-5922
出版年度：2011
卷号：22
期号：3
页码：186-191
DOI：10.1684/sec.2011.0315
出版社：John Libbey Eurotext
摘要：Figures See all figures Authors Fatimata Niang Diop , Anne Mette Lykke , Bienvenu Sambou Université Cheikh Anta Diop de Dakar Faculté des sciences et techniques Institut des sciences de l’environnement BP 5005 Dakar Fann Sénégal, Aarhus University Department of Bioscience Vejls⊘vej 25 8600 Silkeborg Denmark Key words: fire, forest species, grazing, regeneration, Senegal, water requirements DOI : 10.1684/sec.2011.0315 Page(s) : 186-91 Published in: 2011 Forests in Senegal are characterized by a relatively intense degradation, resulting in a marked decrease in forest area, reduction of species densities and changes in structural characteristics. In addition, the natural regeneration of several species poses problems. This degradation also takes place in protected areas like the Fathala Forest, where most woody species face a problem of natural regeneration. The factors involved are both natural and anthropogenic. An inventory of natural regeneration, established with monitoring of drought, fire and cattle browsing over three years, has provided information on the abundance of natural regeneration of Cordyla pinnata (Lepr. Ex. A. Rich.) Milne-Redh. and the impact of these factors on the survival of its regeneration. The results show a high density of natural regeneration dominated by seed germination from the current year. However, the survival of this germination is often limited by those factors. Early fire, late fire, and livestock strongly increase the mortality rate of natural regeneration. Finally, in addition to regeneration through seedlings, Cordyla pinnata has potential resprouting, which helps to increase the number of individuals which survive after fires.
关键词：fire; forest species; grazing; regeneration; Senegal; water requirements
