河口红树林生态系统对大气温室效应的总体作用研究

项目名称： 河口红树林生态系统对大气温室效应的总体作用研究

项目编号： No.41206108

项目类型： 青年科学基金项目

立项/批准年度： 2013

项目学科： 海洋科学

项目作者： 陈光程

作者单位： 国家海洋局第三海洋研究所

项目金额： 24万元

中文摘要： 对红树林湿地温室气体的排放量及其规律，以及红树林湿地在减缓（或加剧）大气温室效应方面所起作用的认识，具有重要的意义。但目前关于红树林湿地土壤-大气界面三种温室气体（二氧化碳、甲烷和氧化亚氮）的排放通量的研究较少，因此不能充分认识红树林对全球气候变暖的贡献。本项目以河口红树林湿地为对象，拟通过对比红树植被对CO2的年吸收量和土壤温室气体的CO2当量通量（三种温室气体的CO2当量通量之和）来评估红树林湿地对温室效应的总体作用。研究内容主要包括（1）调查不同季节和潮位下土壤-大气界面三种温室气体的通量，得出三种温室气体的年化通量，并分析温室气体排放的时空规律及其影响因素；（2）测定植物被净初级生产力，以反映植被对二氧化碳的吸收能力；（3）通过研究红树林湿地与大气的温室气体交换（植被吸收二氧化碳和土壤释放温室气体），以CO2通量作为核算指标评估红树林湿地对大气温室效应的总体作用。

中文关键词： 全球变化；二氧化碳；甲烷；氧化亚氮；红树林

英文摘要： Quantification of the present potential of mangrove soil as sources or sinks for atmospheric greenhouse gas, and the role of mangrove ecosystems in mediating the greenhouse effect, are important and required for the national greenhouse inventory of coastal wetlands. However, the atmospheric greenhouse gas fluxes are poorly characterized in the mangrove wetlands, and the research that simultaneously studies the three gases (CO2, CH4 and N2O) is still limited, leading to an insufficiency acknowledge of the contribution of mangrove ecosystems to global warming. The present study thus aims to quantify the greenhouse gases emissions from estuarine mangrove, andd evaluate the effects of environmental characteristics on greenhouse gases emissions as well as the role of mangrove ecosystem in mediating the greenhouse effect. In a Kandel candel mangrove in Jiulongjiang Estuary, Fujian, field-measurement based studies will be carried out, including (1) investigating the seasonal and spatial variations of greenhouse gas fluxes from mangrove soil and quantifying their annual emissions; (2) measuring the soil chemical and physical characteristics and checking their relationship with gases fluxes; and (3) estimating the absorption of CO2 by mangrove vegetation through measuring the net primary production of mangrove. The annua

英文关键词： Global warming；Carbon dioxide；Nitrous oxide；Methane；Mangrove