FENG Hu - Yuan1 SUN Ji - Zhou1 AN Li - Zhe2 ZHANG Guo - Liang1
1 Department of Biology,Lanzhou Uniuersity, Lanzhou 730000 2 Sttale key Laboratory of Erozen Soil Engineering,lanzhou lnstiute of Glaciology Gepcryology,The Chinese Academy of Sciences,Lanzhou930000