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崇明东滩芦苇湿地温室气体排放通量及其影响因素

胡 泓 王东启 李杨杰 陈振楼 吴 杰 尹秋晓 管永健

胡 泓, 王东启, 李杨杰, 陈振楼, 吴 杰, 尹秋晓, 管永健. 崇明东滩芦苇湿地温室气体排放通量及其影响因素[J]. 环境科学研究, 2014, 27(1): 43-50.
引用本文: 胡 泓, 王东启, 李杨杰, 陈振楼, 吴 杰, 尹秋晓, 管永健. 崇明东滩芦苇湿地温室气体排放通量及其影响因素[J]. 环境科学研究, 2014, 27(1): 43-50.
HU Hong, WANG Dong-qi, LI Yang-jie, CHEN Zhen-lou, WU Jie, YIN Qiu-xiao, GUAN Yong-jian. Greenhouse Gases Fluxes at Chongming Dongtan Phragmites australis Wetland and the Influencing Factors[J]. Research of Environmental Sciences, 2014, 27(1): 43-50.
Citation: HU Hong, WANG Dong-qi, LI Yang-jie, CHEN Zhen-lou, WU Jie, YIN Qiu-xiao, GUAN Yong-jian. Greenhouse Gases Fluxes at Chongming Dongtan Phragmites australis Wetland and the Influencing Factors[J]. Research of Environmental Sciences, 2014, 27(1): 43-50.

崇明东滩芦苇湿地温室气体排放通量及其影响因素

基金项目: 国家自然科学基金项目(40903049,40971259);科学技术部项目(2010BAK69B15)

Greenhouse Gases Fluxes at Chongming Dongtan Phragmites australis Wetland and the Influencing Factors

  • 摘要: 通过静态箱-气相色谱法对崇明东滩芦苇群落在生长周期内的3种温室气体——CH4、N2O和CO2的排放、吸收特征进行研究. 结果表明:芦苇群落湿地CH4排放通量受温度影响较大,夏季排放通量明显高于其他季节,年均排放通量为74.46μg/(m2·h);N2O年均排放通量为2.22μg/(m2·h),冬季排放通量最大;CO2的吸收率季节变化明显,年均排放通量为-101.93mg/(m2·h). 温度、芦苇植株光合作用及呼吸作用是影响CH4产生和排放的主要因素;而沉积物氮素不足和限制,则是促使芦苇群落表现出对N2O吸收的原因;芦苇的光合作用及土壤呼吸作用随温度和季节的变化是控制芦苇湿地CO2的排放和吸收的主要因素. 芦苇植株发达的通气组织是CH4和N2O由大气向沉积物扩散的通道,同时分子扩散过程也是沉积物产生的CH4、N2O和CO2扩散到大气中的途径和方式.

     

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  • 收稿日期:  2013-06-02
  • 修回日期:  2013-08-16
  • 刊出日期:  2014-01-25

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