作者单位: | 1.College of Life Science, Qinghai Normal University, Qinghai Province, Xining810008;2.College of Geography Science, Qinghai Normal University, Qinghai Province, Xining810008;3.School of Grassland Science, Beijing Forestry University, Beijing100083;4.Northwest Institute of Plateau Biology, Chinese Academy of Sciences, Qinghai Province, Xining810008; |