1. Laboratory for Ecological Forecasting and Global Change; Northwest A&F University; Yangling 712100 China
2. Chengdu Institute of Biology; Chinese Academy of Sciences; Chengdu 610041 China
3. Department of Biology Sciences, Institute of Environment Sciences; University of Quebec; Montreal QC Canada H3C 3P8
4. International Centre for Integrated Mountain Development; GPO Box 3226, Khumaltar, Kathmandu Nepal
5. College of Life Sciences; Graduate University of Chinese Academy of Sciences; Beijing 100049 China
6. Department of Geographical Science; Nanjing University; Nanjing 210093 China
7. Ecology Research Section; Central-South University of Forestry and Technology; Changsha Hunan 410004 China
8. College of Life Sciences; Zhejiang University; Hangzhou 310058 China
9. Institute of Geographic Sciences and Natural Resources Research; Chinese Academy of Sciences; Beijing 100101 China