1. School of Environment, Northeast Normal Univ./Inst. of Grassland Science, and Key Laboratory of Vegetation Ecology, Ministry of Education Changchun CN‐130024 Jilin PR China
2. Dept of Aquatic Ecology, Netherlands Inst. of Ecology (NIOO‐KNAW) Wageningen the Netherlands
3. Dept of Terrestrial Ecology, Netherlands Inst. of Ecology (NIOO‐KNAW) Wageningen the Netherlands
4. State Key Laboratory of Vegetation and Environmental Change, Inst. of Botany, Chinese Academy of Sciences Beijing PR China
5. Inst. of Forage and Grassland Sciences, Heilongjiang Academy of Agricultural Sciences Harbin Heilongjiang PR China