1. School of Tourism and Land Resource, Chongqing Technology and Business University Chongqing PR China
2. College of Grassland Science, Beijing Forestry University Beijing PR China
3. Departmentof Natural Resources, Cornell University Ithaca New York USA
4. Institute of Environment and Sustainable Development in Agriculture, Chinese Academy of Agricultural Sciences Beijing PR China
5. National Plateau Wetlands Research Center, College of Wetlands, Southwest Forestry University Kunming PR China
6. School of Environment, State Key Laboratory of Water Environment Simulation, Beijing Normal University Beijing PR China
7. Beijing Academy of Agricultural and Forestry Sciences Beijing PR China
8. China New Era Group Corporation Beijing PR China