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：2
页码：97-107
DOI：10.1684/sec.2011.0306
出版社：John Libbey Eurotext
摘要：Figures See all figures Authors Hady Diallo , Issouf Bamba , Yao Sadaiou Sabas Barima , Marjolein Visser , Abdou Ballo , Adi Mama , Isabelle Vranken , Mohamed Maiga , Jan Bogaert Université libre de Bruxelles Service d’écologie du paysage et systèmes de production végétale CP : 169 50 avenue F.D. Roosevelt 1050 Bruxelles Belgique, Université de Daloa Côte d’ivoire, Université de Bamako Faculté des sciences et techniques BP E 2528 Bamako Mali, Université de Liège Gembloux Agro-Bio Tech Unité Biodiversité et paysage 2 passage des déportés, 5030 Gembloux Belgique Key words: anthropic factor, climate, demographic pressure, demography, Mali, savannah, vegetation dynamics DOI : 10.1684/sec.2011.0306 Page(s) : 97-107 Published in: 2011 Land use and cover evolution in the Fina Reserve have been determined from a diachronic analysis of two Landsat satellite images (TM 1985 and ETM+ 2004), and on-site verification. The results reveal the encroachment of agricultural zones on the reserve peripheral zone and its extension toward the protected zones. The agricultural zone enlargement represents 23% over 19 years to the detriment of tree savanna (1.2% a year). Spatial dynamics analysis of the landscape shows that the shrub savanna development process is remarkable and seems to be becoming widespread throughout the Reserve. In addition, the wooded formations are gradually disappearing, including the woodland relics. The alteration of this vegetation results from a climate deterioration effect (drought) and high pressure associated with agricultural and pastoral activities.
