湿地
甲烷
环境科学
生物地球化学
产甲烷
环境化学
大气(单位)
甲烷厌氧氧化
大气甲烷
根际
土壤水分
微量气体
地下水位
生物地球化学循环
厌氧菌
水文学(农业)
环境工程
地下水
生态学
土壤科学
化学
大气科学
地质学
细菌
古生物学
生物
物理
岩土工程
热力学
出处
期刊:Environmental Engineering Science
[Mary Ann Liebert]
日期:2005-01-01
卷期号:22 (1): 73-94
被引量:583
标识
DOI:10.1089/ees.2005.22.73
摘要
This review examines the interactions among physical, chemical, and biological factors responsible for methane (CH4) emission from natural wetlands. Methane is a chemically and radiatively important atmospheric trace gas. Emission from wetlands is a significant component of the atmospheric CH4 budget, releasing 145 Tg CH4 annually to the atmosphere, or about 25% of total emissions from all anthropogenic and natural sources. Wetlands are characterized by a subsurface, anaerobic zone of CH4 production by methanogenic bacteria and an surficial, aerobic zone of CH4 oxidation by methanotrophic bacteria. Wetlands transfer CH4 to the atmosphere by diffusion, ebullition, and by transport through arenchymous vascular plants. However, about 20 to 40% of the CH4 produced in anaerobic wetland soils is oxidized in the rhizosphere and in surficial oxic layers during diffusive transport to the soil surface. Rates of CH4 emission in wetlands are commonly 100 mg m-2 day-1, and represent the net effect of production and consumption. Water table position, temperature, and plant community composition are important ecosystemlevel controls on wetland CH4 emission.
科研通智能强力驱动
Strongly Powered by AbleSci AI