Xiaofei Yu,^* Guoping Wang,^** Yuanchun Zou,^*** Qiang Wang,^**** Hongmei Zhao,^***** Xianguo Lu<sup>******


*</sup>Xiaofei YuAddress: Key Lab of Wetland Ecology and Environment, Northeast Institute of Geography and Agroecology, Chinese Academy of Sciences, Changchun 130012, China Address: Graduate University of Chinese Academy of Sciences, Beijing 100049, China
^**Guoping Wang () Address: Key Lab of Wetland Ecology and Environment, Northeast Institute of Geography and Agroecology, Chinese Academy of Sciences, Changchun 130012, China. e-mail: wangguoping@neigae.ac.cn
^***Yuanchun ZouAddress: Key Lab of Wetland Ecology and Environment, Northeast Institute of Geography and Agroecology, Chinese Academy of Sciences, Changchun 130012, China Address: Graduate University of Chinese Academy of Sciences, Beijing 100049, China
^****Qiang WangAddress: Changchun Programme Office, WWF China, Changchun 130022, China.
^*****Hongmei ZhaoAddress: Key Lab of Wetland Ecology and Environment, Northeast Institute of Geography and Agroecology, Chinese Academy of Sciences, Changchun 130012, China Address: Graduate University of Chinese Academy of Sciences, Beijing 100049, China
^******Xianguo LuAddress: Key Lab of Wetland Ecology and Environment, Northeast Institute of Geography and Agroecology, Chinese Academy of Sciences, Changchun 130012, China.