Ecological Studies On The Cave Spider Community In Xichou, Yunnan

In this article,the cave spider in Wen Shan county area of Yunnan Province was systemically investigated, and have chosen the cave spider in Gan cave and Longping cave as the main investigating target, whose community structure and the space distribution was preliminarily analysed. From June to December of 2006, after primarily classing and authenticating in lab,499 cave spiders were celected in total, belonging to 16 families 27 generas and 35 species.110 cave spider specimens are celected in Gan cave,belonging to 9 families 15 generas and 18 species. While 180 cave spider specimens are gathered in Gan cave,belonging to 11 families 14 generas and 20 species. According to the different kind group and individual quantity ,the cave spiders are composed of 6 spiders community that is A , B , C , D , E , F.It's preliminarily studied that the degree of richness (D) ,index of concentration(C),index of diversity(H') and degree of evenness (J)about the changes of time and space. The analyzing of the correlation between the Various diversity index and partial environmental factors shows: The highest of index of diversity and degree of evenness in different spider communitys is community in summer in the bright belt of Gan cave,it is respective 2.3465 and 1.0191. The highest of index of concentration of spider communitys is the winter community in the dark belt of Longping cave, that is 0.1745. And the highest of the degree of richness of spider communitys is the summer community in reflection light belt of Longping cave, that is 3.3762. In Gan cave, there are highly significant positive correlation between D and COC and CC. In Longping cave, there are highly significant negative correlation between C and COC ,and highly significant positive correlation between D and pH. The partial correlation analysis shows there are significant positive correlation between J and AT, and between J and COC,significant positive correlation between J and CC both in Gan cave and Longping cave. The Multivariant line correlation analysis results that the major factors that determine J and C both are AT. The major factors that determine D are CDC, the second factor is AT. The major factors that determine H'is CDC.Applying six aggregation degree indices such as the modulus diffusing of Caasier(1962) and the method of Iwao: M *- m regression analysis and Toylar (1961) underworlds laws regression analysis studies space distribution of Theridiidae family in Gan cave and Longping cave. The result shows the spiders of Theridiidae family are aggregated distribution in Gan cave, while that is uniform distribution in Longping cave. The spider individual in the bright belt is attracted mutually, the basis of distributing is an individual group. The spider individual both in the reflection light belt and dark belt is repulsed each other, The population individual room competes mutually.