Wind Farms In Inner Mongolia Dalinuoer Community Structure And Diversity Of Insect

April to October in2013, Chifeng City, Inner Mongolia wind farm Dalinuoer insects (including spiders) community conducted a survey to analyze the composition of the insect community wind farm, the timing dynamics, trophic structure and diversity of features, the use of principal component analysis to explore environmental factors on diversity of insect communities in order to build a wind farm grassland ecological protection and provide a theoretical basis. The main results are as follows:(1)By identified and statistics of the number, during the investigation, I captured9orders、37families and86species, totaling622insects at wind farm in dalinuoer. The main groups were: Diptera, Hemiptera, Coleoptera, Hymenoptera and Araneae. The Tephritidae, Anthomyiidae was the main branch of Diptera, the Coreidae, Pentatomidae Kyi, spittlebugs Branch was the main branch of Hemiptera, the scoop a division of Hymenoptera wasps branch, division of ants was the main branch of Coleoptera.(2)I found the herbivores is the largest proportion by analyzing the trophic structure of insect community. Predators (predatory insects and spiders) was more of control plots than that of the experimental plots, which could control the number of herbivorous insects, in order to make the insect community stable. The dominant families of Herbivorous insects were Coreidae, spittlebugs branch, Miridae, Pentatomidae long, Arcypteridae, Oedipodidae. The dominant families of predatory insects Asian community were scoop a division, Ji Pentatomidae, Section wasps, lacewings Branch, Ichneumonidae. Dominance analysis showed that Hemiptera began to active in the early spring, so it was the dominant familie throughout the year and had a greater impact on the prairie. While the number of beetles was also more. The key point to protect the grassland was to prevent Hemiptera and portect scoop Section.(3)The species richness was391in experimental plots. It was significantly lower than217in control samples plots. It indicated that the control samples plots was more suitable for insects to survive. While the landscape fragmentation was severe in experimental plots, vegetation coverage was not as high as which in control samples plots, this was not good for insects to survive. The Simpson dominance index in experimental plots was same as it in control samples plots. Shannon-Wiener diversity index and Pielou index were slightly higher than that of experimental plots.(4) Timing analysis of insect communities showed that the highest species richness was in August of experimental plots and was in July of control samples. Both of them was single peak trends.The number of individuals of Experimental plots were lower than that of control samples plots each month, the insect community composition both has obvious seasonal variation.The degree of dominance of experimental plots in Dalinuoer was higher than that of control samples plot from May to August, reached the maximum in May, the minimum in September, while was lower in September. The degree of dominance of control plots reached the maximum in September, the minimum in May.From May to August, the diversity index of experimental plots was lower than that of control samples plots,while reached the maximum in September, the minimum in May,and the maximum in May of the control plots.Due to the high degree of dominance of control samples in September, leading to the diversity of experimental plots was higher than that of control samples plots.The evenness index of experimental plots was higher than that of control samples plots each month. It gradually decreased of experimental plots from May to August and slightly increased during September. The trend of evenness index of control samples plots was same as that of experimental plots.Stability analysis showed that the Ss/Si index of experimental plots showing the trend of a single peak, reached the maximum in July, and decreased in later months, Sn/Sp index value reached a maximum in July. The max Sn/Sp index value appeared in June of Control samples plots, Ss/Si index gradually increased as month goes, decreased slightly in August, reached the maximum in September.(5)Through the analysis of the relationship between diversity of insect communities and environmental factors in Dalinuoer wind farm, I found that the environmental factors the first axis represented has greater impact on the insects of both control plots and experimental plots, the main difference is caused by the plant height, plant species, relative plant coverage and relative abundance of plants.