中文关键词闽江河口养虾塘二氧化碳扩散通量气体交换速率模型 英文关键词Minjiang River Estuaryshrimp pondcarbon dioxidediffusive fluxgas exchange ratemodel

作者	单位	E-mail
张逸飞	福建师范大学地理科学学院, 福州 350007	zhangyifei0304@126.com
杨平	福建师范大学地理科学学院, 福州 350007 福建师范大学亚热带湿地研究中心, 福州 350007 湿润亚热带生态地理过程教育部重点实验室, 福州 350007	yangping528@sina.cn
赵光辉	福建师范大学地理科学学院, 福州 350007
李玲	福建师范大学地理科学学院, 福州 350007
谭立山	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 福建师范大学亚热带湿地研究中心, 福州 350007 湿润亚热带生态地理过程教育部重点实验室, 福州 350007	tongch@fjnu.edu.cn

中文摘要 扩散模型是估算水生生态系统水-大气界面二氧化碳（CO₂）交换通量的重要手段.选取多种参数化方法对闽江口围垦养虾塘水-大气界面CO₂气体交换速率（k_x）及CO₂扩散通量进行估算，探讨闽江口围垦养虾塘k_x及CO₂扩散通量的变化特征及影响因素.结果表明：①养殖期水-大气界面CO₂气体交换速率及其扩散通量均呈现显著的时间变化特征，分别表现为10月 > 9月 > 11月 > 7月 > 8月和11月 > 7月 > 8月 > 9月 > 10月的变化趋势；②风速、pH、水体CO₂、DOC和叶绿素a（Chl-a）浓度是影响CO₂扩散通量时间变化特征的重要因素；③不同参数化方法计算得出的闽江口养虾塘水-大气界面CO₂扩散通量存在显著差异（P<0.01），表明模型方法估算养殖塘CO₂扩散通量具有一定不确定性，综合分析认为模型RC01和CW03是估算闽江口围垦养虾塘水-大气界面CO₂扩散通量较为合适的方法. 英文摘要 Freshwater aquatic ecosystems are important sources of greenhouse gases, such as CO₂. However, few studies have presented data on the greenhouse gas flux from coastal aquaculture ponds. Diffusion models are important tools for estimating the CO₂ exchange flux across the water-air interface of aquatic ecosystems. Several different parameterized means were selected to estimate the CO₂ gas exchange rate (k_x) and CO₂ diffusive flux across the water-air interface of shrimp ponds in the Minjiang River Estuary. The results indicated that:① the CO₂ gas exchange rate and diffusive flux over the culture period all presented significant temporal variation. This variation showed a dynamic trend:October > September > November > July > August and November > July > August > September > October. ② Wind speed, k_x, CO₂ concentration, pH, DOC concentration, and Chl-a concentration were important factors affecting the temporal variation of CO₂ diffusive flux. ③ There were differences in the estimated value of CO₂ diffusive flux across the water-air interface of the culture ponds in the Minjiang River Estuary among different parameterized approaches (P<0.01). This indicates that the model method has some uncertainties in estimating the CO₂ diffusive flux in culture ponds. Our results suggest that the models RC01 and CW03 are more suitable methods for estimating the CO₂ diffusive flux at the water-air interface of estuarine reclaimed aquaculture ponds in the Minjiang River Estuary, after comprehensive analysis of the water environment and the different estimation results.

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