1. State Key Laboratory of Vegetation and Environmental Change Institute of Botany Chinese Academy of Sciences Beijing China
2. College of Resources and Environmental Sciences Key Laboratory of Plant–Soil Interactions of the Ministry of Education China Agricultural University Beijing China
3. College of Resource and Environment University of Chinese Academy of Sciences Beijing China
4. Mountain Area Research Institute Agricultural University of Hebei Baoding China
5. Lancaster Environment Centre Lancaster University Lancaster UK
6. Inner Mongolia Research Center for Prataculture Chinese Academy of Sciences Beijing China