湿地碳排放及其影响因素  

Wetland methane and carbon dioxide emission and affecting factors

作　　者：沙晨燕[1] 王敏[1] 王卿[1] 陆健健[2] 

机构地区：[1]上海环境科学研究院,上海200233 [2]华东师范大学,上海200062

出　　处：《生态学杂志》2011年第9期2072-2079,共8页Chinese Journal of Ecology

基　　金：上海市科学技术委员会基金项目(11ZR1430700)资助

摘　　要：湿地生态系统在全球碳循环中起着重要作用。湿地独特的土壤、水文和植被条件,使得其在低氧环境下能不断累积碳,并同时释放大量温室气体——CH4和CO2,因此湿地的碳排放近年来成为全球气候变化研究关注的重点问题。湿地的土壤状况、水文条件及植被类型的不同导致湿地CH4和CO2的排放具有极强的时空变异性。土壤温度与CH4和CO2排放呈正相关关系;水位条件对湿地温室气体的排放有一定影响,在一定范围内,土壤的厌氧环境导致CH4排放量增大,CO2排放量减小;植被影响到温室气体产生、氧化和排放各个方面,因物种而异。Wetland ecosystem plays an important role in global carbon cycle. Its unique soil, hydrology, and vegetation make the wetland able to constantly accumulate carbon in the hypoxic environment, and also, release large amount of greenhouse gases CH4 and CO2. Wetland carbon emission has become a hotspot in the study of global climate change. The differences in the soil status, hydrological condition, and vegetation type in wetland result in a strong spatiotemporal variability of CH4 and CO2 emission from wetland. It＇ s observed that the CH4 and CO2 emission is positively correlated with soil temperature, and affected by water level to a certain extent. Within a certain range, soil anaerobic condition leads to the increase of CH4 emission and the decrease of CO2 emission. Vegetation affects all aspects of the greenhouse gases production, oxidation, and emission, and the affecting degree varies with plant species.

关 键 词：湿地 CH4排放 CO2排放 影响因子 

分 类 号：X171[环境科学与工程—环境科学]