Dissertation Research: Does The Impact of Climate Change On Rates of Soil N Processing Result in Part From Changes in Microbial community composition?

论文研究：气候变化对土壤氮处理速率的影响是否部分源于微生物群落组成的变化？

• 批准号: 0508953
• 负责人: Mary Firestone
• 金额: --
• 依托单位: University of California-Berkeley
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2005
• 资助国家: 美国
• 起止时间: 2005-06-15 至 2007-05-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=0508953&HistoricalAwards=false
• 关键词: Dissertation; Research; Does; Impact; Climate

DEB-0508953 Dissertation Research: Does the impact of climate change on rates of soil N processing result in part from changes in microbial community composition?Damon Bradbury and Mary Firestone, University of California, Berkeley Global change is predicted to alter continental patterns of temperature and precipitation which will in turn impact soil microbial activity. This dissertation research project examines the impact of simulated climate change on microbial community composition and soil nitrogen (N) cycling. Microorganisms catalyze the major transformations of N in soils including the decomposition of leaves, wood and other organic matter. During decomposition processes, essential nutrients such as N are released as inorganic forms that are available to plants. Since N can be a limiting nutrient to plants in temperate systems, an understanding of the microbial processes that control availability of N in soils is important for understanding plant productivity and carbon retention in forests. Microbial N utilization also produces nitrous oxide, a greenhouse gas and a mediator of stratospheric ozone depletion. Understanding the relationship between the rates of N-cycling and the composition and physiological response characteristics of soil microbial communities will allow improved prediction of terrestrial ecosystem response to global environmental change as well as constituting a significant advancement in understanding the microbial basis of terrestrial ecosystem function. Doctoral Dissertation Improvement Grant funds will allow Damon Bradbury, a PhD candidate at University California at Berkeley, to use novel DNA microarray technology to analyze bacterial communities in Redwood Forest soils and perform chemical analyses to characterize the community physiological control over changes in N cycling dynamics that occur due to changes in moisture and temperature.

DEB-0508953论文研究：气候变化对土壤n处理速率的影响部分是由于微生物群落组成的变化？达蒙·布拉德伯里（Damon Bradbury）和加利福尼亚大学玛丽·菲雷斯通（Mary Firestone），加利福尼亚大学，伯克利大学全球变化预计会改变陆上温度和降水模式，这会影响土壤微生物活动。 该论文研究项目研究了模拟气候变化对微生物群落组成和土壤氮（N）循环的影响。 微生物催化了氮在叶子，木材和其他有机物的分解中的主要变化。 在分解过程中，诸如N之类的必需营养物质被释放为可用于植物的无机形式。由于n可以是温带系统中植物的限制，因此对控制土壤中n可用性的微生物过程的理解对于理解森林中的植物生产力和碳保留非常重要。 微生物N使用还会产生一氧化二氮，温室气体和平流层臭氧耗竭的介体。了解N-Cycling的速率与土壤微生物群落的组成和生理反应特征之间的关系将可以改善对陆地生态系统对全球环境变化的反应的预测，并构成在理解地层生态系统功能的微生物基础方面的显着进步。 博士学位论文改善赠款资金将允许加利福尼亚大学伯克利大学的博士候选人达蒙·布拉德伯里（Damon Bradbury）使用新型的DNA微阵列技术来分析红木森林土壤中的细菌群落，并进行化学分析，以表征由于水分和温度变化而导致的N循环动力学变化的社区生理控制。