Interactions Between Plant Chemicals and Microbial Communities Through Forest Succession in the Alaskan Taiga

9408297 Schimel这项研究的主要目的是确定群落组成在演替过程中发生变化的原因，以及生态过程如何因物种组成的变化而发生变化。本研究主要研究阿拉斯加泰加植被演替过程中维管植物群落的变化，以及这些变化对土壤微生物群落的影响和影响。有证据表明，植物物种可以通过改变土壤环境来增强它们占据和维护场地的能力。这是因为不同树种的凋落物质量和化学成分不同。利用田间和实验室程序，这项研究将直接确定植物提取物是否影响相关土壤中的微生物活动。地上和地下过程之间发生相互作用的一般概念长期以来一直是人们感兴趣的，但很少有研究。随着新技术的发展，这些问题才刚刚开始得到解答。这项研究将为更详细地调查地上和地下群落之间的生态系统反馈提供基线分析。

9408297 Schimel The main objective of this research is to determine what causes shifts in community composition during succession, and how do ecological processes change as a result of these changes in species composition. This research focuses primarily on how the vascular plant community in Alaskan taiga vegetation changes during succession, and how these changes affect and are affected by the soil microbial community. Evidence exists to suggest that plant species may enhance their ability to occupy and maintain a site through modification of the soil environment. This occurs because the litter quality and chemical composition differs among tree species. Using field and laboratory procedures, this research will directly determine whether or not plant extracts affect microbial activities in associated soils. %%% The general notion that reciprocal interactions occur between aboveground and belowground processes has long been of interest, but rarely studies. With the development of new technology such questions are just beginning to be answered. This research will provide the baseline analyses for more detailed investigations of ecosystem feedbacks between aboveground and belowground communities.