摘要
对湿地碳储量、碳循环及其影响因素与环境变化的响应特征进行了综合分析。阐述了湿地生态系统是地球上重要的碳库，通过光合作用吸收大量的CO2。并将CO2转化为有机物碳，使其具有碳储量丰富、碳密度高等特点；但湿地资源的不合理开发和利用，改变了湿地环境。湿地由“碳汇”向“碳源”转化。湿地温室气体的排放又加剧了温室效应；全球气温升高、海平面上升及降水量的变化又对湿地分布及功能产生重大影响。指出合理控制湿地碳循环通量是保护湿地的关键。
Wetlands ecosystems are a significant carbon reservoir on the earth by absorbing a good deal of carbon dioxide through photosynthesis whilst converting to organic carbon. Thus, the wetlands ecosystems have the characteristics with rich and high-density of carbon. The carbon storage and carbon cycle of wetlands, as well as their affecting factors and response characteristics to environmental change were analysed. The irrational exploitation of wetlands resources has made a change in the environment of wetlands resulting in the transition from a carbon sink to carbon source that emits greenhouse gases （GHGs） to aggravate the greenhouse effect. The global warming, sea level rise and precipitation change have great influence on the distribution and function of wetlands. It has been pointed out that a key to conservation of wetlands is to properly control the flux of carbon cycle.
出处
《上海环境科学》
CAS
CSCD
2009年第3期93-96,119,共5页
Shanghai Environmental Sciences
基金
国家自然科学基金项目(编号:40672154)
德国“The Ministryof Baden-Wüirttemberg”基金共同资助
关键词
湿地生态系统
碳储库
碳循环
二氧化碳
甲烷
通量
Wetlands ecosystems Carbon storage reservoir Carbon cycle Carbon dioxide Methane Flux
