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：2005
卷号：16
期号：2
页码：115-120
出版社：John Libbey Eurotext
摘要：Figures See all figures Authors Zineddine Benaouda , Zoheir Mehdadi , Ibrahim Bouchaour Département des sciences de l’environnement, Faculté des sciences, Université Djillali Liabès, Sidi Bel Abbès, 22000 Algérie, Laboratoire de botanique, Faculté de pharmacie de Dijon, 7, boulevard Jeanne d’Arc, 21000 Dijon, France Key words: Forestry, Biodiversity, Semiarid areas, Degradation, Anthropic factor, Algeria Page(s) : 115-20 Published in: 2005 The forests of Sidi Bel Abbes are among the most important and diversified of Western Algeria. They are facing damages mainly due to the anthropic pressures and to the severe drought this massif has been undergoing in recent years. The aim of the present study was to make a diagnosis on all of the biotope elements by means of a phytoecological approach. We found that a vegetation characteristic of the aridity of the climate and of the environment was settling in. Alfa (Stipa tenacissima L.) is progressing on damaged soils and its dominance-abundance ratio is getting more and more important on the thinnest slope deposits in natural environment (SDN). We discovered the presence of xeric species (alfa, diss, doum ), thereby explaining the degradation of the vegetation on the one hand and of the soil on the other hand.
