Studies on the Summer and Autumn Spider\'s Diversity and Its Formation Mechanism in the Jiulingshan National Nature Reserve of Jingan County of Jiangxi

• 1、Department of Biology, East China University of Technology, Nanchang 330013
• 2、College of Life Science, Gannan Normal University of Technology, Ganzhou 341000

Abstract：This survey on spider resources and fauna in summer and autumn of the Dahan Villa（A）, the Baofeng Temple（B）, the Upper Ridge（C）, the Inside of Pit（D）, the Nature Reserve（E）and the Sanzhualun Forest Park（F）, all of which located in the Jiulingshan National Nature Reserve of Jingan county of Jiangxi, had obtained 4149 copies of spider specimens. It was discovered by classification and identification that they were attached to 26 families, 102 generas and 220 species, of which 1 family and 20 species were new records of Jiangxi and 55 species were undetermined. A analysis of its spider community composition showed that the size of species richness of families was in turn Araneidae, Salticidae, Theridiidae, Lycosidae, Thomisidae, Tetragnathidae, and Pisauridae etc. A comparative analysis of its spider species' diversity showed that the size order of the Marglef richness index M was F>B>C>D>A>E, the Berger-Parker dominance index d was E>D>C>B>A>F, the Simpson diversity index D was E>D>B> A>C>F, and the McIntosh evenness index E is A>E>D>B>C>F. Then the spider community structure and predation function diversity were analyzed. A cluster analysis of the similarity of its spider community showed that the similarity between these sampling areas was A-B-C=D-E-F. A statistical analysis on action factors of endemic species' diversity showed that the community structure dominance, the community structure diversity, the ampling areas' species richness, and the predation functional dominance were four main factors affecting their summer and autumn spiders' diversity forms in those areas of the Jiulingshan National Nature Reserve of Jingan county of Jiangxi, and there was a common relativity between these index variables. The diversity of spiders of crypt type, surface type, network type and vagabundae type were respectively affected by heterogeneity of ground surface (topography), plant debris cover, vegetation vertical structure and vegetation horizontal structure. Additionally, the availability and abundance of prey will have an impact on the density and diversity of spiders. In short, the diversiform middle tropical forest vegetation, a typical terrace mesa landscape and the abundant moisture in Poyang Lake and Xiuhe from their north or east resulted in the relevance in diversity of spiders in different sampling areas. Moreover, the difference in height, distance, vegetation and moisture condition, and human disturbance degree between these areas guided respectively the formation and exchange for their spider community structure and prey functional diversity. As a result, endemic spiders take an occupying proportion among all spider species in summer and autumn from these areas of the Jiulingshan National Nature Reserve. There exists a small amount of common dominant species in agricultural and residential areas as well.

Keywords： Jiulingshan；nature reserve；spider；diversity；community structure；predation function