School of Geography;
Guangzhou University;
Guangzhou 510405;
P. R. China;
Cold and A rid Regions Environment and Engineering Research Institute;
Chinese Academy of Sciences;
Lanzhou 730000;
P. R. China;
Department of Tourism and Geography;
Foshan University;
Foshan 528000;
P. R. China;
Department of Territorial Resource and Environment;
SUN Yat-Sen University;
Guangzhou 510275;
P. R. China;
青藏高原; 土壤荒漠化; 生态系统; 环境地质学; 含沙土壤;