Characteristics of the avian community in winter in Caohai of Guizhou Province,China

By the method of line transect,a bird survey was conducted in the Caohai Nature Reserve of Guizhou Province from December 2010 to January 2011.Habitats were classified into six catalogues,i.e.farmland,vegetable land,grassland,low water area,deep water area and woods.A total of 88 bird species was recorded,which belonged to 33 families and 13 orders.Among the bird species recorded,1 species was in the GradeⅠnational key protected birds and 6 species was in the Grade Ⅱ,respectively.The overall density(D),α diversity index(H′),predominant index(C) and evenness(J) of the avian communities were 12.14 ind·hm-2,2.98,0.91 and 0.67,and the species,D,H′,C and J were 27～35 species,3.93～33.76 ind·hm-2,1.61～2.78,0.41～0.91 and 0.48～0.79,respectively.The Jaccard similarity index(Cj) of low water area-deep water area was the highest(0.667) while that of deep water area-woods was the lowest(0.016),and the Bray-Curtis index(CN) of woods-vegetable land was the highest(0.006 8) while that of low water area-deep water area was the lowest(0.001 4).Increment from population and urbanization development brought about the loss of avian habitats in Caohai,and disturbance from human had impacts on the avian diversity.Eco-compensation measures were recommended to practice for better management in Caohai.