• 关键词：CO₂排放通量  潮汐沼泽湿地  互花米草  芦苇  咸草  闽江河口

• 基金项目：国家自然科学基金项目(No.41071148, 40671174); 福建省科技厅重点项目(No.2010Y0019)

• 仝川
• 湿润亚热带生态-地理过程省部共建教育部重点实验室,福建师范大学亚热带湿地研究中心,福建师范大学地理科学学院,福州 350007

• 鄂焱
• 湿润亚热带生态-地理过程省部共建教育部重点实验室,福建师范大学亚热带湿地研究中心,福建师范大学地理科学学院,福州 350007

• 廖稷
• 湿润亚热带生态-地理过程省部共建教育部重点实验室,福建师范大学亚热带湿地研究中心,福建师范大学地理科学学院,福州 350007

• 姚顺
• 湿润亚热带生态-地理过程省部共建教育部重点实验室,福建师范大学亚热带湿地研究中心,福建师范大学地理科学学院,福州 350007

• 王维奇
• 湿润亚热带生态-地理过程省部共建教育部重点实验室,福建师范大学亚热带湿地研究中心,福建师范大学地理科学学院,福州 350007

• 黄佳芳
• 湿润亚热带生态-地理过程省部共建教育部重点实验室,福建师范大学亚热带湿地研究中心,福建师范大学地理科学学院,福州 350007

• 张林海
• 湿润亚热带生态-地理过程省部共建教育部重点实验室,福建师范大学亚热带湿地研究中心,福建师范大学地理科学学院,福州 350007

• 杨红玉
• 湿润亚热带生态-地理过程省部共建教育部重点实验室,福建师范大学亚热带湿地研究中心,福建师范大学地理科学学院,福州 350007

• 曾从盛
• 湿润亚热带生态-地理过程省部共建教育部重点实验室,福建师范大学亚热带湿地研究中心,福建师范大学地理科学学院,福州 350007

• 摘要：以闽江河口区面积最大的鳝鱼滩湿地分布的3种植物沼泽湿地:土著种咸草(Cyperus malaccensis Lam.var.brevifolius Bocklr.)沼泽湿地、芦苇(Phragmites australis) 沼泽湿地及外来入侵种互花米草(Spartina alterniflora Loisel.)沼泽湿地为研究对象,于2009年1月到12月利用静态箱-气相色谱仪法测定了涨潮前、涨落潮过程和落潮后3个阶段沼泽湿地排向大气环境的CO₂通量(生态系统呼吸量).结果表明,芦苇沼泽湿地3个阶段CO₂排放通量月平均值均最高,分别为(563.7±119.8)、(230.3±54.2)和(506.2±83.8) mg·m^-2·h^-1;3种植物沼泽湿地在涨落潮过程直接排向大气环境的CO₂通量显著低于涨潮前和落潮后2个阶段(p<0.05),涨潮前和落潮后CO₂排放通量无显著差异(p>0.05),潮水水淹显著减少了河口潮汐沼泽湿地直接排向大气环境的CO₂通量.芦苇和咸草沼泽湿地CO₂排放通量与大气温度和土壤温度(10 cm深度)均具有显著的正线性关系.

• Abstract：CO₂ emission to the atmosphere and its seasonal variation in 2009 were studied using an enclosed static chamber technique from three tidal marshes dominated respectively by two native species of Cyperus malaccensis var.bervifolius and Phragmites australis (common reed), and an alien invasive species of Spartina alterniflora in the Shanyutan Wetland in the Min River Estuary, southeast China. Measurements were taken during three tidal stages (exposed-before flood, submerged-flooding and ebbing process, and exposed-after ebb). There were considerable monthly variations with greater CO₂ emissions before flood in some months, whereas at other months greater CO₂ emission after ebb. The monthly averaged CO₂ emissions during three tidal stages from the P. australis stand were highest, which were (563.7±119.8), (230.3±54.2) and (506.2±83.8) mg·m^-2·h^-1, respectively. Tidal inundation had an obvious affect on CO₂ emission. CO₂ emissions from these three plant stands were all significantly lower during the period of tidal inundation (submerged-flooding and ebbing process) than that at the exposed-stage (before flood and after ebb)(p<0.05). However, there was no significant difference on CO₂ emissions observed between before flood stage and after ebb stage. CO₂ emissions from the P. australis stand and the C. malaccensis stand had a significant positive correlation with soil and air temperature.

• Key words：CO₂ emission  tide marsh  Phragmites australis  Cyperus malaccensis Lam.var.brevifolius Bocklr  Spartina alterniflora   Min River Estuary

• 
  摘要点击次数： 3411 全文下载次数： 4306