Acknowledgements
We would like to thank the staffs at the West Dongting Lake National
Nature Reserve and Xiao Yayu, Zhao Changbin, and Guo Min for their help
in data collection. This study was supported by the National Key
Research and Development Program of China (Grant Number 2017YFC0405303),
the Fundamental Research Funds for the Central Universities (Grant
Numbers 2017ZY15).