1. Key Laboratory of Vegetation Ecology Ministry of Education Institute of Grassland Science/School of Life Science Northeast Normal University Changchun China
2. Cooperative Institute for Research in Environmental Sciences University of Colorado Boulder CO USA
3. Departamento de Biología y Geología Física y Química Inorgánica Escuela Superior de Ciencias Experimentales y Tecnología Universidad Rey Juan Carlos Móstoles Spain
4. College of Grassland, Resources and Environment Key Laboratory of Grassland Resources of the Ministry of Education Key Laboratory of Forage Cultivation, Processing and High Efficient Utilization of the Ministry of Agriculture and Rural Affairs Inner Mongolia Key Laboratory of Grassland Management and Utilization Inner Mongolia Agricultural University Hohhot China
5. Ministry of Education Key Laboratory of Ecology and Resource Use of the Mongolian Plateau & Inner Mongolia Key Laboratory of Grassland Ecology School of Ecology and Environment Inner Mongolia University Hohhot P. R. China
6. National Hulunber Grassland Ecosystem Observation and Research Station/Institute of Agricultural Resources and Regional Planning Chinese Academy of Agricultural Sciences Beijing China