Net Effects of Rising CO2 on the Performance of Plants and Their Insect Herbivores

BazzazDEB 9903808富集二氧化碳对植物的直接影响越来越为人所知。然而，在CO2浓度升高的情况下，植物和以这些植物为食的昆虫之间的相互作用还不是很清楚。 本研究提出了三个问题，如何人口和社区可能会受到影响的变化，在高二氧化碳的气氛中，植物昆虫的相互作用，使用昆虫物种从不同的饲养公会饲养的整个植物。第一个实验将确定来自不同取食团的昆虫如何对在CO2浓度升高下生长的单一宿主植物作出反应。在第二个实验中，氮和CO2处理将被用来详细研究这些环境因素对植物和昆虫表现的相互作用。 在这项研究中提出的最后一个实验将探讨改变草食动物的偏好对植物竞争相互作用的潜在影响在一个多物种的寄主植物组合。这将极大地扩展我们的知识，不同的昆虫取食反应的寄主植物质量的变化，在高CO2下将影响植食动物和植物的性能。这项研究的组成部分将提供重要的见解，如何升高的二氧化碳大气将影响昆虫植物在个人，种群和社区水平的相互作用。

BazzazDEB 9903808The direct effects of enriched CO2 on plants are becoming increasingly well known. However, how the interactions of plant and insects that feed on those plants under elevated CO2 is not very well understood. This study proposes to address three questions about how populations and communities may be affected by changes in plant insect interactions in high CO2 atmospheres, using insect species from different feeding guilds reared on whole plants. The first experiment will determine how insects from different feeding guilds respond to a single host plant grown under elevated CO2. In the second experiment, both Nitrogen and CO2 treatments will be used to examine in detail the interactive effects of these environmental factors on both plant and insect performance. The last experiment proposed in this study would examine the potential effects of altered herbivore preferences on plant competitive interactions within a multi-species host plant assemblage. It will greatly extend our knowledge of how the feeding responses of different insects to changes in host plant quality under high CO2 will affect both herbivore and plant performance. The components of this research will provide important insight into how elevated CO2 atmospheres will affect insect-plant interactions at the individual, population, and community levels.