摘要
湿地生态系统是地球上重要的有机碳储库,湿地植被和土壤碳储量丰富、碳密度高。湿地还是CO2、CH4和N2O等温室气体的源和汇。近百年来,由于土地利用,特别是农业开发和泥炭开采,导致大面积湿地被排干,并排放大量温室气体。多项研究表明湿地保护和恢复能促进碳积累和减少温室气体排放,通过对国内外有关文献的分析,针对近年来科学界普遍关注的湿地生态系统碳储量、碳平衡和土地利用对温室气体排放的影响、湿地与全球气候变化关系等方面的问题进行了初步探讨。
Wetland ecosystem is an important carbon pool in the world. Wetlands have the highest carbon density of all terrestrial ecosystems. Wetland soils and peat are long-term reservoirs for carbon. In terms of greenhouse gases, wetlands can either be sources or sinks of carbon dioxide(CO_2), methane(CH_4) and nitrous oxide (N_2O). There are influence of many factors the carbon cycle process in wetlands. Drainage of wetlands significantly increases CO_2 emission. Some researches show that wetland protection and restoration are helpful to carbon accumulation and GHG reduction. So protection of wetland carbon stock can mitigate global climate change. According to some new results of the studies on the relationship of wetlands and the global climate change, this paper put it emphasis on wetland carbon stock, carbon balance and influences of land use on GHG emission in wetlands.
出处
《地理科学》
CSCD
北大核心
2004年第5期634-639,共6页
Scientia Geographica Sinica
基金
国家自然科学基金重点项目(30230090)
中国人民大学科学研究基金项目(2003XJ046)。
关键词
湿地
温室气体
碳储存
碳平衡
土地利用
wetland
greenhouse gases
carbon storage
carbon balance
land use
