We built a GIS software based Ecological Information System(EIS) which integrated the satellite remote sensing image(TM),topographic maps,vegetation maps,land use maps and field survey data.Then,we analyzed the impacts of human activities on the habitat of the Przewakski's gazelle( Procapra przewakskii Buchner) in the Qinghai Lake region.The key factors influenced the habitat suitability of the Przewakski's gazelle were identified as the matrix,slope,distance to the water sources,the type of vegetation,a...