A PRIMARY STUDY ON SPECIES DIVERSITY OF WATER BIRDS AND ITS RELATIONSHIP TO WATER ENVIRONMENT AT LAKE JINYINHU,WUHAN

During the investigation on water birds at Lake Jinyinhu from Nov.2007 to Mar.2009,34 birds species of 11 families 8 orders were recorded,in which there were 21 winter migrant species,6 summer migrant species,5 resident species and 2 passengers.In terms of geographical distribution type,there were 21 Palaearctic species,2 Oriental species and 11 cosmopolitan species.Platalea leucorodia,listed on both Rank Ⅱ National Protected Wildlife and China Red Data Book of Endangered Animals,was recorded.And there were 10 species protected provincially.According to the feeding habits of water birds,there were more spedes living on fish and shrimp,but more biomass of the species living on hydrophytes.The water quality of Lake Jinyinhu turned out to be even poorer than the 5th level.were analyzed,The bird diversity index in different seasons and different habitats were analyzed.It indicated that the reconstruction of hydrophytes and the change of wate-land area by water level control would increase the biodiversity of Lake Jinyinhu.Furthermore,the species diversity of water birds and environmetn condition were compared between urban and suburban lakes of Wuhan.The result showed that the water bird diversity correlated negatively with the pollution degree,positively with the area of lakes.Thus the over development and encroachnent of wetlands should be prohibited,and it is urgent to improve the water quality.