当前大气CO2浓度正不可逆转地持续升高并强烈影响农林生态系统，以CO2浓度升高为主因所引起的全球气候变化是本世纪人类面临的最重大环境问题，全球变化与生物入侵的关系正成为入侵生物学研究的热点之一。本项目选择有重大危害性的入侵害虫西花蓟马为主要对象，在前期项目研究成果的基础上，结合云南近年来的持续干旱，研究西花蓟马及其本地近缘种对有代表性的全球气候变化因子CO2浓度升高的响应及生理机制，从害虫种群扩张、个体取食、生理生化和分子生物学等多个角度系统比较和分析CO2浓度倍增条件下西花蓟马与本地近缘种的种间抑制与竞争取代、种群结构与动态、连续多个世代潜在种群增长指数、寄主为害性及其跨世代效应、个体生长发育、繁殖、体内酶活性和种群遗传结构变化，探讨生物入侵性随环境变化的演化趋势，诠释未来高CO2浓度下入侵害虫种群扩张与寄主危害效应机制，其结果可为西花蓟马的长期预测与综合治理提供科学依据和实践指导。

Now the atmospheric carbon dioxide (CO2) concentration are keep on increasing and mightily impact agriculture and forestry eco-system, and with the elevated atmosphere CO2 concentration as main factor caused global climate change is the most environmental problems we faced in this century, the relationship between biological invasion and global climate change is becoming a hot spot in the study of invasion biology at the present time. This project was on the basis of the results of prior NSFC project "Study on population genetic of Frankliniella occidentalis and the displace mechanism for native thrips"(Grant No. 30860069), considering the recent years continuance drought in Yunnan province, choose the principal invasive insect pest in China, western flower thrip, Frankliniella occidentalis, as main research target pest, study responses and physiological mechanism of this insect pest and its related species such as Frankliniella intonsa to the representational key factor of global climate change, elevated CO2 concentration, at molecular, biochemical, physiological, individual and population levels comparing and analyzing the population genetic structure differentiation, growth, development, reproduction, enzyme activity, population dynamics, continuum generational potential population increase, host damage and transgenerational effect under doubled CO2 concentration, to explore the invasion trend of F. occidentalis under the background of global climate change, annotate the population expansion and host damage mechanism of invasive insect pest in the CO2 concentration doubled future, and the study results will offer theoretical basis and practical guidance for monitoring and integrated management of the invasive species, F. occidentalis.