Abstract:

Based on the identification of specimens of Odonata collected in Nanjing area of Jiangsu from 2005 to 2008,the total species of dragonflies recorded and collected were 45,which consist of 8 families,29 genera.The characteristic of the fauna is that Oriental species take the most part.There are 13 species belonging to Oriental,which accounted for 2889% in total.Palearctic species is comparatively poor.There are 5 Palearctic species,which accounted for 1111% in total.Calculating species richness(〖WTBX〗S〖WTBZ〗),species composition similarity (〖WTBX〗Cs〖WTBZ〗) and species diversity index (〖WTBX〗H′〖WTBZ〗) for the seven habitats showed that the species richness decreased in the following sequence:Zijin Mountain(30)=Lao Mountain(30)>Jiangjun Mountain(24)>Jiangxinzhou Alluvion(19)>Fang Mountain(18)>Donglu Mountain(13)>Jinniu Lake(9);the species diversity decreased in a different sequence:Jiangjun Mountain(2.9298)>Zijin Mountain(2.9150)>Lao Mountain(2.7258)>Fang Mountain(2.6574)>Jiangxinzhou Alluvion(2.5478)>Donglu Mountain (1.9025)>Jinniu Lake(1.6700).The dragonfly species composition between Fang Mountain and Donglu Mountain had the highest similarity (0.7742),while Jinniu Lake and Lao Mountain had the lowest similarity (0.4103).