Microbial Biogeochemistry and Functional Diversity across the Forest-Tundra Ecotone in the Rocky Mountains

落基山脉森林-苔原生态交错带的微生物生物地球化学和功能多样性

• 批准号: 0084223
• 负责人: Steven Schmidt
• 金额: $ 100万
• 依托单位: University of Colorado at Boulder
• 依托单位国家: 美国
• 项目类别: Continuing Grant
• 财政年份: 2000
• 资助国家: 美国
• 起止时间: 2000-10-01 至 2005-09-30
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=0084223&HistoricalAwards=false
• 关键词: Microbial; Biogeochemistry; Functional; Diversity; across

Drs. Steven K. Schmidt and Andrew P. Martin have been awarded a grant to establish a microbial observatory to study the distribution and functioning of microorganisms that live in soils of high-elevation tundra and forests of the Rocky Mountains. They will concentrate on microorganisms that are involved in environmentally important processes such as soil nitrogen transformations and methane (natural gas) exchange between soil and the atmosphere. These processes are important because they can contribute to global warming and pollution of drinking water down stream from high mountain areas. Emphasis will be placed on studying the microbes that carry out these functions during the winter under deep snow packs of the Rocky Mountain region. Their preliminary work shows that soils under deep snow are actually very biologically active and that important environmental transformations of nitrogen and methane take place under the snow. Almost nothing is known, however, about the identity of the cold-adapted organisms that carry out these processes under the snow pack. Drs. Schmidt and Martin will measure the production and consumption of various nitrogen compounds and methane across the landscape during summer and winter. They will simultaneously use DNA sequencing and probing methods to determine the identity of the dominant microorganisms that carry out these important biogeochemical processes.

史蒂文·K·施密特博士和安德鲁·P·马丁博士获得了建立微生物观测站的资助，以研究生活在高海拔冻土带土壤和落基山脉森林中的微生物的分布和功能。它们将集中于参与环境重要过程的微生物，如土壤氮素转化和土壤与大气之间的甲烷(天然气)交换。这些过程很重要，因为它们可能导致全球变暖和高山地区下游饮用水的污染。重点将放在研究在落基山脉地区厚厚的积雪下冬季执行这些功能的微生物。他们的初步工作表明，深雪下的土壤实际上非常具有生物活性，氮和甲烷的重要环境变化在雪下发生。然而，对于在积雪下执行这些过程的冷适应生物的身份，人们几乎一无所知。施密特和马丁博士将测量夏季和冬季整个地区各种氮化合物和甲烷的生产和消费情况。他们将同时使用DNA测序和探测方法来确定执行这些重要生物地球化学过程的优势微生物的身份。