Key Laboratory of Environmental Change and Natural Disaster;
Ministry of Education of the People's Republic of China;
Beijing Normal University;
Beijing 100875;
China;
Qinghai Academy of Agriculture and Forestry;
Xining 810016;
China;
College of Geography and Environment Science;
Northwest Normal University;
Lanzhou 730070;
China;
The area around Qinghai Lake; desertified land; transition of land-use types; spatial change; regional variation;