1. Key Laboratory of Ecosystem Network Observation and ModelingInstitute of Geographic Sciences and Natural Resources ResearchChinese Academy of Sciences Beijing China
2. College of Resources and EnvironmentUniversity of Chinese Academy of Sciences Beijing China
3. Key Laboratory of Remote Sensing of Gansu ProvinceCold and Arid Regions Environmental and Engineering Research InstituteChinese Academy of Sciences Lanzhou China
4. Department of Microbiology and Plant BiologyUniversity of Oklahoma Norman OK USA
5. National Hulunber Grassland Ecosystem Observation and Research Station/Institute of Agricultural Resources and Regional PlanningChinese Academy of Agricultural Sciences Beijing China
6. Institute of Grassland ScienceNortheast Normal University and Key Laboratory of Vegetation EcologyMinistry of Education Changchun China