Acknowledgements
We acknowledge and thank all the volunteers, Wenwen Zhang, Yue Sun,
Xiangsheng Wang, Yue Sun, Xiangsheng Wang and He Zhang, for their help
in the field sampling work. We also thank Fei Chen, Xiumei Xu, Weiping
Li and Dr. Xiaoliang Zhi for their help with the classifications and
statistical advice. In addition, we would like to express our gratitude
to the administrative staff of Heilongjiang Sanhuanpao National Nature
Reserve and the local fishermen and villagers in Jinshan town, Fujin
city, for their great support.