Acknowledgements
The research was supported by the Special Foundation for Basic
Scientific and Technological Research Program (2013FY111800). We
gratefully appreciate the help provided by the Administration of
Wuliangushai Nature Reserve, the Administration of Wulagai Nature
Reserve, the Administration of Khorchin Nature Reserve, the
Administration of Dalinor Nature Reserve, the Administration of Chaganhu
Nature Reserve, the Administration of Hengshuihu Nature Reserve and the
Administration of Shahu Nature Reserve to access the study sites and
provide facilitiesfor the surveys. Our thanks are especially to Dr. Wang
Yuyu, Dr. Jiao Shengwu, Mr. Mo Xunqiang, Liu Yunzhu, Tao Cui, Chen
Zhengrong, Qu Shang, Li Xiaojing, Tong Yuping, Li Yiyi, Zhu Yi, Yang
Lingfan, Sun Gongqi, Li Gang and Jeroen Saccheri for assistance during
the fieldwork; and to Li Yiyi for laboratory assistance and Li yu for
assistance in part of data collection.