STUDIES ON THE STRUCTURE OF THE SPIDER COMMUNITY AND DIVERSITY IN CULTIVATED LAND
农田蜘蛛群落结构及其多样性研究

In the paper, the structure of the spider community in cultivated lands and diversity on the condition of nonapplication of insecticides in Nanning area were stndied.1. The total number of spiders collected was 6061 which includes 14 families, 41 genues and 80 species. The main components of the spider community in paddy fields were Ummeliata insecticeps, Lycosa pseudoannulata, Pirata subpiraticus, Theridion octomaculatum, Tetragnatha japonica and Dyschiriognatha culata. The main components of the Wolf spider subcommnnity were Trochosa ruricola and Pardosa spp in arid lands.2. The diversities of the spider community at various habi tats of paddy field are different. It was maximum at the grass of dikes of fields, but minimum at the early rice. The diversity, species richness and evenness of spiders were increased with time sequence from early rice to late rice. The average diversity, average evenness and average individual numbers of spiders in late rice were higher than that in early rice. The diversity and evenness of the Wolf spider subcommunity were maximum in grass land.3. By using similarity of the number proportion for community and analysis of FUZZY method, it was showed that the main components of the Wolf spider subcom-mnuity were Lycosa pseudoannulata and Pirate subpiraticus in paddy field, Trochosa ruricola and Pardosa spp in arid land respectively. These components are quite typical of the Wolf spider subcommunity in the two habitats in cultivated lands in Manning area.