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

高浓度二氧化碳对植物的直接影响越来越为人所知。然而，在二氧化碳浓度升高的情况下，植物和以这些植物为食的昆虫如何相互作用还不是很清楚。本研究提出了三个问题，即在高CO2大气中植物和昆虫相互作用的变化如何影响种群和群落，利用来自不同取食行业的昆虫物种饲养整株植物。第一个实验将确定来自不同食料行业的昆虫对二氧化碳浓度升高下生长的单一寄主植物的反应。在第二个试验中，将采用氮和CO2处理来详细研究这些环境因素对植物和昆虫生产性能的相互作用。本研究提出的最后一个实验将研究在多物种寄主植物组合中，食草动物偏好改变对植物竞争相互作用的潜在影响。这将极大地扩展我们对高CO2环境下不同昆虫对寄主植物质量变化的摄食反应如何影响食草动物和植物性能的认识。这项研究的组成部分将提供重要的见解，如何提高二氧化碳大气将影响昆虫与植物的相互作用在个体，种群和社区水平。

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.