Dissertation Research: Tree Species Influences on Soil Microbial Communities

讨论研究：树种对土壤微生物群落的影响康奈尔大学的蒂姆·费希预测二氧化碳和氮沉降的增加将改变东北部森林中树种的分布和丰度。树种的变化将如何影响森林生态系统，需要更好地了解树种和土壤微生物之间的关系。这项研究的目标是研究树种如何影响土壤微生物，以及不同类型的土壤微生物如何影响森林中的碳和氮循环。这项研究将在纽约州德莱登的火鸡山种植园进行，60多年前，这些种植园在一块普通的土壤上种植了几块树种。初步结果表明，树种对这些地块的碳和氮循环有很大影响，这种差异可能部分源于土壤微生物的差异。在树种、土壤微生物和碳氮循环之间建立联系，对于评估生态系统层面对全球变化的反应至关重要。

ABSTRACTDEB-0407916Dissertation Research: Tree species influences on soil microbial communitiesTim Fahey, Cornell UniversityIncreases in carbon dioxide and nitrogen deposition have been predicted to alter the distribution and abundance of tree species in northeastern forests. How changes in tree species will influence forest ecosystems requires a better understanding of the relationship between tree species and soil microorganisms. The goals of this research are to examine how tree species influence soil microbes, and to examine how different types of soil microbes affect carbon and nitrogen cycling in forests. The research will be conducted at the Turkey Hill Plantations in Dryden, NY where plots of individual tree species were planted in a common soil 60+ years ago. Preliminary results suggest that tree species have a large influence on carbon and nitrogen cycling in these plots and that the differences may result, in part, from differences in soil microbes. Establishing links between tree species, soil microbes and carbon and nitrogen cycling is critical to assessing ecosystem-level responses to global change.