The Impact of Water Level Variation in Satellite Lakes on Wintering Migratory Bird Diversity in Jiangxi Poyang Lake Nanji Wetland National Natural Reserve Under Climate Change

Guo Huicai;Hu Binhua;Wan Songxian;Wan Qing;Kong Ping;Hu Wei;Jiangxi Poyang Lake Nanji Wetland National Natural Reserve Authority;Climate Center of Jiangxi Province;Nanchang Hospital of Integrated Traditional and Western Medicine;

Satellite lake;;The variation of water level;;Wintering migratory bird;;Diversity

We studied the impact of water level variation of plate-shaped lakes on wintering migratory birds under climate change in Jiangxi Poyang Lake Nanji Wetland National Natural Reserve( WNNR). We sampled three satellite lakes,including two plate-shaped lakes Baisha Lake and Zhanbei Lake and an open habitat named Dong Lake,in Nanji WNNR,and monitored water levels and wintering birds from October 2015 to January 2016. We recorded 32 bird species of 9 families and 14 orders. Among these,23 species were winter visitors,3 species were winter and summer visitors,3 species were summer visitors,2 species were passage migrants,and 1 species was resident. Shannon-wiener's index,Pielou's index and Simpson's index varied by satellite lake and month. Both diversity and evenness were the highest in March,followed by November,January,December,October,and February. Diversity was highest at Zhanbei Lake and lowest at Dong Lake. Species richness did not vary by month,while the numbers of birds increased and then declined,the highest bird count was 40000 in February and was dominated by Anseriformes. In general,the number of wintering bird species was negatively correlated to water level,highest temperature,average temperature and precipitation. Bird counts were negatively correlated to water level in Baisha Lake and Zhanbei Lake. Based on the impact of water level on bird community structure,diversity,number of species and birds of wintering bird in the satellite lakes,we propose conservation strategies.