1. Institute of Ecology, College of Urban and Environmental Sciences, and Key Laboratory for Earth Surface Processes of the Ministry of Education, Peking University, Beijing 100871, China.
2. Department of Geography, Remote Sensing Laboratories, University of Zürich, 8057 Zürich, Switzerland.
3. Theoretical and Experimental Ecology Station, CNRS, 09200 Moulis, France.
4. Swiss Federal Institute of Forest, Snow and Landscape Research WSL, 8903 Birmensdorf, Switzerland.
5. CSIRO Land and Water, Canberra, ACT 2601, Australia.
6. Department of Forestry and Natural Resources, Purdue University, West Lafayette, IN 47907, USA.
7. College of Pastoral Agriculture Science and Technology, Lanzhou University, Lanzhou, Gansu 730000, China.
8. State Key Laboratory of Vegetation and Environmental Change, Institute of Botany, Chinese Academy of Sciences, Beijing 100093, China.
9. College of Ecology and Environmental Sciences, Yunnan University, Chenggong, Kunming 650500, China.