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：1
页码：57-64
DOI：10.1684/sec.2011.0292
出版社：John Libbey Eurotext
摘要：Figures See all figures Authors Boubé Morou , Jean-Marie Karimou Ambouta , Saley Karim , Ali Mahamane , Mahamane Saadou , Zamah Allah Mainassara , Brice Sinsin Université Abdou Moumouni de Niamey Faculté des sciences Laboratoire Garba Mounkaila BP 10662 Niamey Niger, Université d’Abomey Calavi 01 BP 526 Cotonou Bénin Key words: giraffe, grazing, land use, satellite imaging, Niger, tiger bush, wildlife DOI : 10.1684/sec.2011.0292 Page(s) : 57-64 Published in: 2011 This study is devoted to investigating the status of giraffe habitat during the period 1986-2003, with the purpose of establishing its level of degradation. The giraffe population increased from 62 to 175 individuals from 1998 to 2007. An impact evaluation of soil occupation (in particular that occupied by the tiger bush, the giraffe's main habitat) was done using diachronic analysis based on the interpretation of satellite maps (Landsat) with ArcView 3.2. software. The soil occupation dynamics map was obtained from the combination of the two generated maps. Results showed a decrease in tiger bush (main giraffe habitat) total surface as a consequence of an increase in cultivated areas. In addition, various status changes were observed for some of the recorded soil occupation units. The main factors behind this giraffe habitat degradation are recurrent drought, expansion of cultivated areas, overgrazing, wood cutting and the extension of road network. This study heightens the interest of temporal monitoring of the degradation of the giraffe habitat. This study highlights the interest of temporal tracking of the giraffe's habitat degradation.
关键词：giraffe; grazing; land use; satellite imaging; Niger; tiger bush; wildlife
