Collaborative Research: IPY: Microbial subzero activity and its impact on biogeochemical processes in frozen tundra and permafrost

合作研究：IPY：冰冻苔原和永久冻土中微生物的零度以下活动及其对生物地球化学过程的影响

• 批准号: 0733053
• 负责人: Tingjun Zhang
• 金额: $ 15.59万
• 依托单位: University of Colorado at Boulder
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2008
• 资助国家: 美国
• 起止时间: 2008-01-01 至 2010-12-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=0733053&HistoricalAwards=false
• 关键词: Collaborative; Research; IPY; Microbial; subzero

This project focuses on the recently discovered ability of microorganisms to metabolize in frozen soil and permafrost at temperatures to below 4oC. This research builds upon previous microbiological studies of psychrophiles in diverse permafrost and Arctic soils across Alaska, Eurasia and Greenland. This project will explore the significance of this subzero microbial activity and its role in polar systems undergoing global climatic change. The overall objective of the work is to understand the impact of these microbial processes on permafrost dynamics. The research will be approached through an interdisciplinary study combining mathematical modeling with experimental studies using molecular biological, environmental, physical and biogeochemical methods. This project will conduct a systematic study of subzero metabolic activities, through laboratory studies using intact frozen cores, on permafrost resistance to thaw and erosion. The long term goal of this work is to understand whether subzero microbial activity plays a critical role in permafrost dynamics. In turn these results should improve the reliability of global change prediction in high latitude environments and should lead to new frontiers in polar research. This project will provide an opportunity for graduate and undergraduate students to combine microbiology and physics to study permafrost microbial processes and biophysical chemistry in permafrost processes.

该项目的重点是最近发现的微生物在温度低于4 ℃的冻土和永久冻土中代谢的能力。 这项研究建立在以前对阿拉斯加，欧亚大陆和格陵兰岛不同永久冻土和北极土壤中嗜冷菌的微生物研究的基础上。 该项目将探索这种零度以下微生物活动的意义及其在经历全球气候变化的极地系统中的作用。这项工作的总体目标是了解这些微生物过程对冻土动力学的影响。该研究将通过跨学科研究进行，将数学建模与使用分子生物学，环境，物理和地球化学方法的实验研究相结合。该项目将通过使用完整的冻芯进行实验室研究，对零度以下的新陈代谢活动进行系统研究，以确定永久冻土的抗解冻和侵蚀能力。这项工作的长期目标是了解零度以下的微生物活动是否在冻土动力学中起着关键作用。 反过来，这些结果应提高高纬度环境下全球变化预测的可靠性，并应导致极地研究的新领域。该项目将为研究生和本科生提供一个机会，联合收割机微生物学和物理学相结合，研究冻土微生物过程和生物物理化学在冻土过程。