Fragmentation in Semi-Arid and Arid Landscapes: Consequences for Human and Natural Systems
Kathleen A. Galvin
Springer Science & Business Media, Oct 12, 2007 - Nature - 429 pages
The global significance of the world’s rangelands is large, with these arid and semi-arid systems making up almost 25% of the earth’s landscapes – and supporting the livelihoods of more than 20 million people. These ecosystems are also home to several of the planet’s remaining megafauna, as well as other important species. Yet fragmentation across these rangelands has significantly impaired the ability of both people and animals to compensate for temporal heterogeneity in vegetation and water by exploiting its spatial heterogeneity, resulting in limited resource availability. The case is developed that while fragmentation arises from different natural, social and economic conditions worldwide it creates similar outcomes for human and natural systems. With information from nine sites around the world the authors examine how fragmentation occurs, the patterns that result, and the consequences of fragmentation for ecosystems and the people who depend on them.
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agricultural Amboseli animals arid and semi-arid Athi-Kaputiei Australia Behnke Boone BurnSilver cattle Chapter climate Colorado State University communal farmers Coughenour cultivation Dalrymple Shire decline distribution drought dry season dynamics East Africa Ecology economic ecosystem editors environment farms fencing forage Global grasslands grazing lands group ranches habitat fragmentation habitat loss herbivores herd herders heterogeneity Hobbs households impacts increased infrastructure Institute intensification Journal K. A. Galvin Kajiado District Kazakh Kazakhstan Kenya Kerven Kitengela land tenure land-use landscape large herbivores livelihoods livestock livestock production Maasai mobility Mongolia Nairobi National Elk Refuge National Park natural resources Ngorongoro Conservation Area nomadic Northern Great Plains numbers Pages parcels pastoral pastoralists patches patterns Perkins County plant rainfall range rangeland fragmentation rangelands region Research savanna scale sedentarization Serengeti settlement social capital South Africa spatial species strategies subdivision sustainable Tanzania ungulates variability vegetation water points wildebeest wildlife
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