1 State Key Laboratory of Biogeology and Environmental Geology, China University of Geosciences, Rm1008, Main Building, 388 Lumo Road, Hongshan District, Wuhan 430074, Hubei, China Tel: 86-27-67883452.
2 Key Laboratory of Tibetan Environment Changes and Land Surface Processes, Institute of Tibetan Plateau Research, Chinese Academy of Sciences, No.18, Shuangqing Rd., Beijing 100101, China.
3 Department of Biological Sciences, Louisiana State University, 202 Life Sciences Bldg, Baton Rouge, LA 70803, USA.