江苏南京地区蜻蜓目(Odonata)昆虫区系及多样性分析

2005～2008年对江苏南京地区的蜻蜓资源进行了调查，共发现蜻蜓目昆虫45种，隶属于8科29属。其区系组成的特点是：东洋成分占明显优势，有13种，约占总数的2889%；古北区的种类相对较少，只有5种，约占总数的1111%。研究分析了7个样地蜻蜓的物种丰富度多样性指数(〖WTBX〗H′)、均匀度指数(J)、优势度指数(D)和相似性系数(Cs〖WTBZ〗)。结果发现：蜻蜓物种丰富度由大到小的顺序为紫金山(30)=老山(30)>将军山(24)>江心洲(19)>方山(18)>东庐山(13)>金牛湖(9)；各样地的多样性指数排序为将军山(2.9298)>紫金山(2.9150)>老山(2.7258)>方山(2.6574)>江心洲(2.5478)>东庐山(1.9025)>金牛湖(1.6700)。其中，方山与东庐山的相似性系数最大(0.7742)，金牛湖分别与紫金山和老山的相似性系数最小(0.4103)。

ON FAUNA AND DIVERSITY OF ODONATA IN NANJING,JIANGSU PROVINCE

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).