| 闽江口短叶茳芏+芦苇沼泽湿地大、小潮日土壤间隙水溶解性CH4与CO2浓度日动态 |
| 摘要点击 1774 全文点击 799 投稿时间：2016-06-10 修订日期：2016-08-21 |
| 查看HTML全文
查看全文 查看/发表评论 下载PDF阅读器 |
| 中文关键词 间隙水 溶解性CH4 溶解性CO2 大、小潮日 日变化 河口湿地 |
| 英文关键词 porewater dissolved methane dissolved carbon dioxide neap and spring tide day diurnal variation estuarine wetland |
| 作者 | 单位 | E-mail | | 谭立山 | 福建师范大学地理科学学院, 福州 350007 | tanlishan92@163.com | | 杨平 | 福建师范大学地理科学学院, 福州 350007
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 350007 | | | 何露露 | 福建师范大学地理科学学院, 福州 350007 | | | 黄佳芳 | 福建师范大学地理科学学院, 福州 350007
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 350007
福建师范大学亚热带湿地研究中心, 福州 350007 | | | 胡智强 | 福建师范大学地理科学学院, 福州 350007 | | | 仝川 | 福建师范大学地理科学学院, 福州 350007
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 350007
福建师范大学亚热带湿地研究中心, 福州 350007 | tongch@fjnu.edu.cn |
|
| 中文摘要 |
| 研究河口感潮沼泽湿地土壤间隙水溶解性CO2和CH4浓度日动态对于揭示河口湿地碳循环过程具有重要作用.于2010年的4月4~5日和9月2~3日（小潮日）和4月14~15日和9月9~10日（大潮日），对闽江河口鳝鱼滩中部中高潮滩过渡区分布的短叶茳芏（Cyperus malaccensis）+芦苇（Phragmites australis）沼泽湿地的土壤间隙水溶解性CO2和CH4浓度进行24 h连续监测，并同步测定了原位土壤温度、电导率及NH4+-N等参数.结果表明：14月与9月大、小潮日土壤间隙水溶解性CH4浓度日变化范围分别介于88.20~190.74、53.42~141.24、16.27~81.89和44.90~88.53 μmol·L-1，其中4月大、小潮日土壤间隙水溶解性CH4浓度均呈现昼低夜高特征（P>0.05），而9月大、小潮日呈现相反的日变化趋势（P<0.05）；29月大、小潮日土壤间隙水溶解性CO2浓度日变化范围分别介于19.33~40.1μmol·L-1和9.69~29.96 μmol·L-1，均呈现昼低夜高特征（P<0.01）；3涨潮期间土壤间隙水溶解性CO2浓度均要低于涨潮前与落潮后，而涨潮期间土壤间隙水溶解性CH4浓度高于涨潮前和落潮后. |
| 英文摘要 |
| Understanding of diurnal variation of soil porewater dissolved CO2 and CH4 concentration plays an important role in revealing carbon cycling in estuarine wetlands.During neap and spring tidal days in April and September 2010,the diurnal variations of soil porewater dissolved CO2 and CH4 concentrations and main impacting factors in a brackish marsh ecosystem dominated by two species of Cyperus malaccensis(brevifolius) and Phragmites australis(common reed) were determined in the ShanYutan in the Min River estuary,southeast China.The results showed that:① the soil porewater dissolved CH4 concentration during the spring and neap tidal days in April and September ranged from 88.20 to 190.74,53.42 to 141.24,16.27 to 81.89 and 44.90 to 88.53 μmol·L-1,respectively.The mean of dissolved CH4 concentration was higher at nighttime than at daytime during the spring and neap tidal days in April,but the mean of dissolved CH4 concentration was higher at daytime than at nighttime during the spring and neap tidal tidal days in September.② the soil porewater dissolved CO2 concentration during the spring and neap tidal days in September ranged from 19.33 to 40.1 μmol·L-1 and 9.69 to 29.96 μmol·L-1,respectively,and the dissolved CO2 concentration during daytime was lower than that at night;③ the mean of dissolved CO2 concentration was lower during the inundation period than in the exposed soil surface period,but the mean of dissolved CH4 concentration was higher during the inundation period than in the exposed soil surface period. |
|
|
|
