Physiological and Molecular Diversity of Atmospheric Methane (CH4) Oxidizers in Soil
土壤中大气甲烷 (CH4) 氧化剂的生理和分子多样性
基本信息
- 批准号:0089738
- 负责人:
- 金额:$ 109.16万
- 依托单位:
- 依托单位国家:美国
- 项目类别:Continuing Grant
- 财政年份:2001
- 资助国家:美国
- 起止时间:2001-09-15 至 2005-08-31
- 项目状态:已结题
- 来源:
- 关键词:
项目摘要
Atmospheric methane contributes substantially to the greenhouse effect and has increased dramatically in the past century because of expanding agriculture and industry. Bacterial consumption of methane in soils is an important regulator of atmospheric methane concentration. The significance of the soil sink lies in its potential to mediate long-term, anthropogenic effects on atmospheric methane through its response to disturbances such as agriculture, forest clearcutting, drought, and soil warming. Because the amount of atmospheric methane consumed annually in soils is comparable to the annual increase in atmospheric methane, the cumulative effects of disturbance on the soil methane sink over time could contribute significantly to methane accumulation in the atmosphere. However, the biology of the soil sink is poorly understood because researchers have yet to identify and fully describe the soil bacteria that actually oxidize atmospheric methane in situ. In this project, Dr. Steudler and colleagues will investigate the physiology and molecular ecology of atmospheric methane oxidizers in five temperate and taiga forest ecosystems where disturbance effects on atmospheric methane consumption are well characterized. Their goal is to assess the role of cross-site diversity among the methane oxidizing organisms in controlling the soil methane consumption response to disturbances, including N fertilization, drought and soil warming. This research will provide an estimate of microbial diversity among soil atmospheric methane oxidizers across geographically distant and ecologically distinct forest ecosystems, examine how this diversity is distributed in nature relative to biogeochemical process dynamics and ecological gradients, and assess how important this diversity is in controlling the ecosystem-level response of soil methane consumption to disturbance and climate change.
大气中的甲烷对温室效应有很大的贡献,并且在过去的世纪由于农业和工业的发展而急剧增加。土壤细菌消耗甲烷是大气甲烷浓度的重要调节因子。土壤汇的重要性在于它有可能通过对农业、森林皆伐、干旱和土壤变暖等干扰的响应,调解长期人为对大气甲烷的影响。由于土壤中每年消耗的大气甲烷量与大气甲烷的年增长量相当,因此随着时间的推移,扰动对土壤甲烷汇的累积影响可能会显著促进大气中甲烷的积累。然而,人们对土壤汇的生物学知之甚少,因为研究人员还没有确定并充分描述实际上原位氧化大气甲烷的土壤细菌。在这个项目中,Steudler博士及其同事将研究五个温带和针叶林生态系统中大气甲烷氧化剂的生理学和分子生态学,在这些生态系统中,对大气甲烷消耗的干扰作用得到了很好的表征。他们的目标是评估甲烷氧化生物在控制土壤甲烷消耗对干扰(包括氮肥、干旱和土壤变暖)的反应中的跨站点多样性的作用。这项研究将提供一个估计的微生物多样性土壤大气甲烷氧化剂在地理上遥远的和生态上不同的森林生态系统,研究这种多样性是如何分布在自然界中相对于生态地球化学过程动态和生态梯度,并评估这种多样性是如何重要的是在控制生态系统水平的响应土壤甲烷消耗的干扰和气候变化。
项目成果
期刊论文数量(0)
专著数量(0)
科研奖励数量(0)
会议论文数量(0)
专利数量(0)
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Paul Steudler其他文献
Paul Steudler的其他文献
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{{ truncateString('Paul Steudler', 18)}}的其他基金
Acquisition of a Continuous Flow Isotope Ratio Mass Spectrometer System
连续流同位素比质谱仪系统的获取
- 批准号:
0420348 - 财政年份:2004
- 资助金额:
$ 109.16万 - 项目类别:
Standard Grant
Physiological and Molecular Diversity of Atmospheric CH4 Oxidizers in Soil
土壤中大气 CH4 氧化剂的生理和分子多样性
- 批准号:
9708092 - 财政年份:1997
- 资助金额:
$ 109.16万 - 项目类别:
Continuing Grant
IAI Workshop: Biogeochemical Consequences of Land Use Change in the Amazon Basin
IAI 研讨会:亚马逊流域土地利用变化的生物地球化学后果
- 批准号:
9529836 - 财政年份:1996
- 资助金额:
$ 109.16万 - 项目类别:
Standard Grant
Carbonyl Sulfide and Carbon Disulfide Emissions from Temperate and Boreal Forests Along an Acid Rain Gradient
温带和北方森林沿酸雨梯度的硫化碳和二硫化碳排放
- 批准号:
8714673 - 财政年份:1988
- 资助金额:
$ 109.16万 - 项目类别:
Continuing Grant
Carbonyl Sulfide and Carbon Disulfide Emissions from Temperate and Boreal Forests Along an Acid Rain Gradient
温带和北方森林沿酸雨梯度的硫化碳和二硫化碳排放
- 批准号:
8505480 - 财政年份:1985
- 资助金额:
$ 109.16万 - 项目类别:
Standard Grant
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