SGER: Microbial Processes in Tundra Ecosystems Under Simulated Climate Change Conditions

SGER：模拟气候变化条件下苔原生态系统中的微生物过程

• 批准号: 0542283
• 负责人: Barbara Campbell
• 金额: --
• 依托单位: University of Delaware
• 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: 2005-10-01 至 2007-09-30
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=0542283&HistoricalAwards=false
• 关键词: SGER; Microbial; Processes; Tundra; Ecosystems

Climate change models suggest that major shifts in carbon storage may occur, especially in northern latitudes where greater than 1/3 of the earth's carbon pool is stored. This project seeks to understand how microbial communities in Arctic tundra soils are changed by long ( 20 years) and short ( 1 year) term manipulation of nutrients and temperature at the Toolik Lake, AK, long term ecological research station. Microbial community structure and function likely play critical roles in determining carbon storage vs. release in tundra soils. Use of a novel molecular method combined with standard microbial physiological profiling will provide an unprecedented level of detail about tundra soil microbial community structure and function. Understanding how changes in climatic forcing factors affect microbial populations will refine predictions of carbon dynamics relative to existing trends in global change. Changes found in this study may also reflect past climate change events, allowing improved characterization of the geological record. This proposal will ground truth an emerging molecular technique for application in microbial ecology and generate supporting material for future studies in microbial responses to climate change.

气候变化模型表明，碳储存量可能会发生重大变化，特别是在北方纬度地区，那里储存了超过1/3的地球碳库。 该项目旨在了解北极苔原土壤中的微生物群落是如何通过长期（20年）和短期（1年）的营养物质和温度在图里克湖，AK，长期生态研究站的操纵而改变的。 微生物群落结构和功能可能在决定冻原土壤碳储存与释放方面发挥关键作用。 使用一种新的分子方法结合标准的微生物生理分析，将提供一个前所未有的详细水平苔原土壤微生物群落结构和功能。 了解气候强迫因素的变化如何影响微生物种群，将改进相对于全球变化现有趋势的碳动力学预测。 这项研究中发现的变化也可能反映了过去的气候变化事件，从而改善了地质记录的特征。 这一提议将为微生物生态学中应用的新兴分子技术奠定基础，并为未来微生物对气候变化的反应研究提供支持材料。