East Dongting Lake National Natural Reserve was regarded as a typical study area,and wetland migratory birds was divided into five categories,and chose five kinds of environmental factors.Correlation analysis and redundancy analysis were applied to study these relationships.Results indicated that(1) the quantity of wetland migratory birds in east Dongting lake showed an uneven and increasing trend,which might be related to conservation measures executed in east Dongting lake,the habitat selection and adapta...