1. State Key Laboratory of Vegetation and Environmental Change Institute of Botany Chinese Academy of Sciences Beijing China
2. University of Chinese Academy of Sciences Beijing China
3. School of Plant and Environmental Science Virginia Tech Blacksburg VA USA
4. State Key Laboratory of Forest and Soil Ecology Institute of Applied Ecology Chinese Academy of Sciences Shenyang China
5. School of Land Science and Technology China University of Geosciences Beijing China
6. Tropical Research and Education Center, Soil and Water Science Department University of Florida Homestead FL USA