Dissertation Research: Anaerobic Mirobial Metabolism and the Biogeochemical Functioning of Wetlands

论文研究：厌氧微生物代谢和湿地的生物地球化学功能

• 批准号: 0072980
• 负责人: Stephen Hamilton
• 金额: $ 1万
• 依托单位: Michigan State University
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2000
• 资助国家: 美国
• 起止时间: 2000-06-01 至 2002-11-30
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=0072980&HistoricalAwards=false
• 关键词: Dissertation; Research; Anaerobic; Mirobial; Metabolism

00-72980Hamilton / WhitmireDDIG: Anaerobic microbial metabolism and the biogeochemical functioning of wetlandsMicrobial decomposition of organic matter plays a central role in the functioning of wetlands, and much of this decomposition occurs in the absence of oxygen (e.g., anaerobic conditions). Anaerobic microorganisms mediate chemical transformations that alter downstream water quality, and emit greenhouse gases such as methane to the atmosphere, thereby affecting climate. By understanding how the nature and rates of microbial processes vary across a broad suite of wetland ecosystems, we can better predict the impacts of disturbance on the functions of wetlands. This research will evaluate these microbial processes in a variety of Michigan wetlands. Techniques developed for marine and groundwater studies will be employed to determine the dominant microbial processes. Substances to be measured will include dissolved hydrogen gas, a universal intermediary in decomposition, as well as chemical byproducts of anaerobic metabolism. Specific process rates, including acetate turnover and sulfate reduction, will be measured to corroborate the findings.

00-72980汉密尔顿/惠特米尔DDIG：厌氧微生物代谢和湿地的生态地球化学功能有机物的微生物分解在湿地的功能中起着核心作用，并且这种分解大部分发生在没有氧气的情况下（例如，厌氧条件）。 厌氧微生物介导化学转化，改变下游水质，并向大气排放甲烷等温室气体，从而影响气候。 通过了解微生物过程的性质和速率如何在一系列湿地生态系统中变化，我们可以更好地预测干扰对湿地功能的影响。这项研究将评估这些微生物过程中的各种密歇根湿地。将采用为海洋和地下水研究开发的技术来确定主要的微生物过程。 待测物质将包括溶解的氢气，一种通用的分解中间体，以及厌氧代谢的化学副产物。具体的工艺速率，包括乙酸盐周转率和硫酸盐还原率，将进行测量，以证实调查结果。