西双版纳自然保护区昆虫病原真菌群落多样性及主要种群的生态位研究

昆虫病原真菌因其在害虫生物防治中的独特优势而备受关注，国内外对其群落多样性及种群生态位的研究报道甚少，亦无理想的生态位量化计算公式。西双版纳自然保护区为低纬高原热带雨林生态系统,被誉为生物多样性研究的热区，该区内有关昆虫病原真菌群落多样性及主要种群生态位还未见报道。本项目拟以西双版纳自然保护区热带季雨林、季风常绿阔叶林、苔藓常绿阔叶林、热带丛生竹林、暖热性针叶林为基地，于不同季节在不同海拔生境中系统调查和标本采集，研究昆虫病原真菌群落多样性，弄清该区域昆虫病原真菌群落组成结构及其时空分布规律；研究昆虫病原真菌主要种群的生态位特征及其季节动态，探明生态位理论在昆虫病原真菌群落结构研究中的可行性；比较不同计算公式对种群生态位宽度和生态位重叠值的评价效果，筛选出适合森林生态系统昆虫病原真菌生态位特征量化评估的计算公式。该研究将为昆虫病原真菌多样性及热带雨林生态系统害虫生防菌筛选提供依据。

Fungal Entomopathogens have attracted more and more attention because of their important role in the pest control, few is known on the community diversity and ecological niche of main population of fungal entomopathogens, and no standard statistics formula for the niche value evaluation. Xishuangbanna Nature Reserve is located in Yunnan province，it belongs to the lower altitude plateau forest ecosystem and the spot area for the biodiversity study, but no systematic study on the community diversity, and the ecological niche of main population of fungal entomopathogens were conducted here. So this project will community diversity and the niche characteristics of main population of fungal entomopathogens in different altitudes, habitats in different seasons throughout a year in tropical raining forest, evergreen broad-leaf forest, montane mossy evergreen broad-leaf forest, tropical bamboo forest, warm coniferous forest in Xishuangbanna Nature Reserve using the research techniques of fungal entomopathogens and community ecology. To make clear of the composition structure and its temporal and spatial rules of fungal entomopathogens by studying the community diversity. To verify the availability of niche theory in the community diversity study after the study of the niche characteristics and their seasonal dynamics. To get an available formula for the evaluation of the niche characteristics for the fungal entomopathogens by comparing the niche characteristics value from the different statistics formula. The study will provide good basis for the study on the biodiversity and the biological control fungal entomopathogens screen on forest pests.