| 洞庭湖湿地洪水期甲烷扩散和气泡排放通量估算及水环境影响分析 |
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| 引用本文： | 任艺洁,邓正苗,谢永宏,朱莲莲,陈晓蓉,张称意,陈心胜,李峰,邹业爱.洞庭湖湿地洪水期甲烷扩散和气泡排放通量估算及水环境影响分析[J].湖泊科学,2019,31(4):1075-1087. |
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| 作者姓名： | 任艺洁 邓正苗 谢永宏 朱莲莲 陈晓蓉 张称意 陈心胜 李峰 邹业爱 |
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| 作者单位： | 中国科学院亚热带农业生态研究所农业生态过程重点实验室,长沙410125;中国科学院亚热带农业生态研究所,中国科学院洞庭湖湿地生态系统观测研究站,长沙410125;中国科学院大学,北京100049;中国科学院亚热带农业生态研究所农业生态过程重点实验室,长沙410125;中国科学院亚热带农业生态研究所,中国科学院洞庭湖湿地生态系统观测研究站,长沙410125;中国气象局国家气候中心,北京,100081 |
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| 基金项目： | 国家自然科学基金项目（41401290）、中国科学院亚热带农业生态研究所青年创新团队（2017QNCXTD_LF）和中国气象局东北地区生态气象创新开放实验室课题（STQX201703）联合资助. |
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| 摘 要： | 水体甲烷（CH4）主要通过气泡和扩散传输排放到大气，这两种途径在CH4总排放中的相对贡献及环境影响因子目前关注较少.本文以洞庭湖湿地3种生境类型（光滩、苔草、芦苇）为研究对象，通过静态箱法和扩散模型法估算洪水期CH4总排放通量、扩散排放通量和气泡排放通量，并分析其水体环境因子影响.结果表明：苔草地CH4总排放量最高，为6.49±3.12 mg（C）/（m2·h）.在3个生境中，CH4扩散排放占总排放通量的1.34%~3.91%，气泡排放占96.09%~98.66%.扩散排放通量受水体pH、电导率和水温的影响，而CH4的总排放和气泡排放主要受水温的影响.当水温低于11.7℃时，水体CH4以扩散排放为主，但当水温高于11.7℃时，水体CH4主要通过气泡排放.但这一温度阈值是否同样适用于其他类型湿地还需要更多实验验证.本研究对于揭示中低纬度内陆湖泊水体CH4排放过程有重要意义.
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| 关 键 词： | 甲烷通量 气泡传输 扩散传输 水温 洞庭湖湿地 |
| 收稿时间： | 2018/12/10 0:00:00 |
| 修稿时间： | 2019/1/17 0:00:00 |
Estimation of methane diffusion and ebullition flux and water environmental controls during flooding period in Lake Dongting wetlands |
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| REN Yijie,DENG Zhengmiao,XIE Yonghong,ZHU Lianlian,CHEN Xiaorong,ZHANG Chengyi,CHEN Xinsheng,LI Feng and ZOU Ye''ai.Estimation of methane diffusion and ebullition flux and water environmental controls during flooding period in Lake Dongting wetlands[J].Journal of Lake Science,2019,31(4):1075-1087. |
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| Authors: | REN Yijie DENG Zhengmiao XIE Yonghong ZHU Lianlian CHEN Xiaorong ZHANG Chengyi CHEN Xinsheng LI Feng and ZOU Ye'ai |
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| Institution: | Institute of Subtropical Agriculture, Chinese Academy of Sciences, Changsha 410125, P. R. China;Dongting Lake Station for Wetland Ecosystem Research, Institute of Subtropical Agriculture, Chinese Academy of Sciences, Changsha 410125, P. R. China;University of Chinese Academy of Sciences, Beijing 100049, P. R. China,Institute of Subtropical Agriculture, Chinese Academy of Sciences, Changsha 410125, P. R. China;Dongting Lake Station for Wetland Ecosystem Research, Institute of Subtropical Agriculture, Chinese Academy of Sciences, Changsha 410125, P. R. China,Institute of Subtropical Agriculture, Chinese Academy of Sciences, Changsha 410125, P. R. China;Dongting Lake Station for Wetland Ecosystem Research, Institute of Subtropical Agriculture, Chinese Academy of Sciences, Changsha 410125, P. R. China,Institute of Subtropical Agriculture, Chinese Academy of Sciences, Changsha 410125, P. R. China;Dongting Lake Station for Wetland Ecosystem Research, Institute of Subtropical Agriculture, Chinese Academy of Sciences, Changsha 410125, P. R. China;University of Chinese Academy of Sciences, Beijing 100049, P. R. China,Institute of Subtropical Agriculture, Chinese Academy of Sciences, Changsha 410125, P. R. China;Dongting Lake Station for Wetland Ecosystem Research, Institute of Subtropical Agriculture, Chinese Academy of Sciences, Changsha 410125, P. R. China;University of Chinese Academy of Sciences, Beijing 100049, P. R. China,National Climate Center, China Meteorological Administration, Beijing 100081, P. R. China,Institute of Subtropical Agriculture, Chinese Academy of Sciences, Changsha 410125, P. R. China;Dongting Lake Station for Wetland Ecosystem Research, Institute of Subtropical Agriculture, Chinese Academy of Sciences, Changsha 410125, P. R. China,Institute of Subtropical Agriculture, Chinese Academy of Sciences, Changsha 410125, P. R. China;Dongting Lake Station for Wetland Ecosystem Research, Institute of Subtropical Agriculture, Chinese Academy of Sciences, Changsha 410125, P. R. China and Institute of Subtropical Agriculture, Chinese Academy of Sciences, Changsha 410125, P. R. China;Dongting Lake Station for Wetland Ecosystem Research, Institute of Subtropical Agriculture, Chinese Academy of Sciences, Changsha 410125, P. R. China |
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| Abstract: | |
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| Keywords: | CH4 flux ebullition diffusion water temperature Lake Dongting wetlands |
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