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...Tropical biology and conservation management desert ecosystems an introduction silvio carlos rodrigues instituto de geografia universidade federal uberlandia mg brazil keywords deserts geomorphology landforms landscape morphological systems eolian process dune erg hamada inselbergs playas climate temperature precipitation continents latitude longitude biogeography water balance desertification sandization arid lands semi dry sub humid climates encroachment agro ecology geology hydrology ground operational holding land use natural fertility drought human interface livestock degradation chemical fertilizers pesticides vegetation bio fertilizer agriculture civilization environment egyptian holocene harappa mesopotamia mohenjo daro neolithic period contents past development location of physical economics effects wind erosion on section overview bibliography summary this chapter presents to showing the distribution them in planet main characteristic these inhospitable ecologically fragile a...