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Virginia Polytechnic Institute and State University (1998)

Spatio-Temporal Effects of Land Use Changes in A Savanna Wildlife Area of Kenya

Esikuri, Enos E..

Titre : Spatio-Temporal Effects of Land Use Changes in A Savanna Wildlife Area of Kenya

Auteur : Esikuri, Enos E..

Université de soutenance : Virginia Polytechnic Institute and State University

Grade : Doctor of Philosophy in Fisheries and Wildlife Sciences 1998

Résumé
Land use changes have been shown to have significant effects on wildlife species. Sixty three percent of the national Parks and Reserves in Kenya are located in the savannas. Because of the seasonality associated with savanna ecosystems, 75% of the wildlife species and numbers in Kenya occur in savanna nonpark areas. Therefore, conservation of wildlife in Kenya has to address the changes that are taking place in savanna areas outside parks. I studied land use changes and their effects on elephant habitat quality in Amboseli Basin, Kenya. I used visual interpretation to analyze land use changes from satellite images for 1975, 1988, and 1993. I determined that during the evaluation period, conversion of areas to agricultural land has been unidirectional. The hectarage under cultivation was 2,937, 10,950, and 24,476 for 1975, 1988, and 1993 respectively. Trend analysis seems to suggest that during the evaluation period, conversion of areas to agricultural land has followed an exponential function (R2 = 0.99) in Amboseli Basin. The area under cultivation was 6.9% of the total area studied. This is small but significant considering that agricultural land was almost exclusively located in areas that form the dry season fall back areas. Such areas are important for the survival of elephants and other species during critical periods.

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