闽江河口短叶茳芏沼泽生态系统不同潮汐阶段净CO_(2)交换  

Net Ecosystem Exchange of CO_(2) of the Cyperus malaccensis Marsh Ecosystem Before Flood,Slack and After Ebb in the Min River Estuary

作　　者：方淑媛 韩智献 刘白贵 高居娟[4] 黄佳芳 仝川[1,2,3] FANG Shuyuan;HAN Zhixian;LIU Baigui;GAO Jujuan;HUANG Jiafang;TONG Chuan(School of Geographical Sciences,School of Neutrality Future Technology,Fujian Normal University,Fuzhou 350117,China;Key Laboratory for Humid Subtropical Eco-geographical Processes of the Ministry of Education,Fujian Normal University,Fuzhou 350117,China;Wetland Ecosystem Positioning Research Station of Min River Estuary,National Forestry and Grassland Administration,Fuzhou 350215,China;不详)

机构地区：[1]福建师范大学地理科学学院、碳中和未来技术学院,福州350117 [2]福建师范大学湿润亚热带生态地理过程教育部重点实验室,福州350117 [3]福建闽江河口湿地生态系统国家定位观测研究站(国家林草局),福州350215 [4]不详

出　　处：《亚热带资源与环境学报》2024年第4期18-27,共10页Journal of Subtropical Resources and Environment

基　　金：中央专项财政支持项目([350182]FJYHZB[GK]2024001);国家重点研发计划项目(2022YFC3105401);国家自然科学基金项目(41877335)

摘　　要：潮汐是河口感潮湿地最显著的水文特征,它深刻影响着河口感潮湿地生态系统的结构、过程和功能。然而目前关于潮汐对河口感潮沼泽生态系统净二氧化碳交换(net ecosystem exchange of CO_(2),NEE)和生态系统呼吸(ecosystem respiration,ER)影响尚不清晰。本研究以闽江河口鳝鱼滩中潮滩分布的短叶茳芏沼泽湿地为研究对象,分别在涨潮前1 h、平潮水淹期和退潮后1 h 3个阶段,运用透明静态箱及遮光布遮光+红外气体分析仪原位测定短叶茳芏沼泽生态系统NEE和ER。闽江河口短叶茳芏沼泽生态系统NEE在涨潮前1 h、平潮期和退潮后1 h无显著性差异,然而,短叶茳芏沼泽生态系统平潮期ER显著低于涨潮前1 h和退潮后1 h,相对于涨潮前1 h和退潮后1 h时,短叶茳芏沼泽生态系统平潮期ER分别减少41%和39%。闽江河口短叶茳芏沼泽湿地在地表出露的涨潮前1 h和退潮后1 h,土壤温度对其NEE的相对贡献率最高,在潮水水淹平潮期,光合有效辐射对其NEE的相对贡献率最高。Tidal is the most distinct hydrographic feature of estuarine marshes,which strongly affects the ecosystem structure,process and function of the ecosystem of estuarine marsh.However,the impact of tides on net ecosystem exchange of CO_(2)(NEE)and ecosystem respiration(ER)in estuarine tidal marsh ecosystems remains currently unclear.It is of great scientific significance to evaluate the blue carbon sink function of estuarine tidal marsh ecosystem under the background of global climate change.In this study,the NEE and ER were measured at three stages(1 hour before flood,1 hour during slack and 1 hour after ebb)during daytime in the Cyperus malaccensis marsh of the Min River estuary in situ by using transparent static chamber+cloths shading+infrared gas analyzer.There was no significant difference in the NEE of the C.malaccensis marsh ecosystem among three stages before flood,slack and after ebb.However,the ER at slack stage was significantly lower than that at first hour before flood,and 1hour after ebb.The ER of C.malaccensis marsh ecosystem decreased by 41%and 39%,respectively.The relative contribution rate of soil temperature to the NEE was the highest in the exposure period,and the relative contribution rate of photosynthetical active radiation to NEE was the highest in the slack flooding period.

关 键 词：生态系统净二氧化碳交换 生态系统呼吸 潮汐 短叶茳芏沼泽 闽江河口 

分 类 号：X171[环境科学与工程—环境科学]