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当前位置: 首页 > 文章 > 潮汐作用下干湿交替对黄河三角洲盐沼湿地净生态系统CO_2交换的影响 应用生态学报 2018 (1) 269-277
Position: Home > Articles > Effects of drying and wetting cycles induced by tides on net ecosystem exchange of CO_2 over a salt marsh in the Yellow River Delta,China Chinese Journal of Applied Ecology 2018 (1) 269-277

潮汐作用下干湿交替对黄河三角洲盐沼湿地净生态系统CO_2交换的影响

作  者：
贺文君;韩广轩;许延宁;张希涛;王安东;车纯广;孙宝玉;张孝帅
单  位：
中国科学院烟台海岸带研究所中国科学院海岸带环境过程与生态修复重点实验室;中国科学院大学;华东师范大学生态与环境科学学院;山东省黄河三角洲国家级自然保护区管理局
关键词：
潮汐;干湿交替;净生态系统CO_2交换;盐沼湿地
摘  要：
潮汐作用作为盐沼湿地独特的水文特征能在短时间内强烈影响盐沼湿地的碳平衡.利用涡度相关和微气象监测技术,对黄河三角洲盐沼湿地净生态系统CO_2交换(NEE)和环境因子进行监测,并同步监测潮汐变化,探究潮汐过程及潮汐作用下干湿交替对NEE的影响.结果表明:潮汐过程促进了白天生态系统CO_2的吸收但未对夜晚CO_2的释放产生显著影响,潮汐淹水成为影响白天NEE的主要因子.干旱阶段和湿润阶段NEE的日平均动态均呈"U"型曲线,但干旱阶段NEE的变幅较小.干湿交替增强了白天生态系统CO_2的吸收,干旱阶段最大光合速率(A_(max))、表观量子产量(α)和生态系统呼吸(R_(eco))的均值均高于湿润阶段.此外,干湿交替减少了盐沼湿地夜晚NEE释放的同时增强了其温度敏感性.
译  名：
Effects of drying and wetting cycles induced by tides on net ecosystem exchange of CO_2 over a salt marsh in the Yellow River Delta,China
作  者：
HE Wen-jun;HAN Guang-xuan;XU Yan-ning;ZHANG Xi-tao;WANG An-dong;CHE Chun-guang;SUN Bao-yu;ZHANG Xiao-shuai;Key Laboratory of Coastal Environmental Processes and Ecological Remediation,Yantai Institute of Coastal Zone Research,Chinese Academy of Sciences;University of Chinese Academy of Sciences;Administration Bureau of the Yellow River Delta National Nature Zone Reserve;School of Ecological and Environmental Sciences,East China Normal University;
关键词：
tidal action;;drying and wetting cycle;;net ecosystem CO_2 exchange;;salt marsh
摘  要：
As a unique hydrological characteristic,the tidal action can strongly affect carbon balance in a salt marsh despite their short duration. Using the eddy covariance technique,we measured the net ecosystem CO_2 exchange(NEE) and its environmental factors and tidal change over a salt marsh in the Yellow River Delta. It aimed to investigate the effect of tidal process and drying and wetting cycles induced by tides on NEE. The results showed that the tidal process promoted the daytime CO_2 uptake,but it didn't clearly affect the nighttime CO_2 release. Tidal inundation was a major factor influencing daytime NEE. The diurnal change of NEE showed a distinct U-shaped curve on both drought and wet stages,but not with substantial variation in its amplitude during the drought stage. The drying and wetting cycles enhanced the absorption of daytime CO_2. Under drought stage,the mean of the maximum photosynthetic rate(A_(max)),apparent quantum yield(α) and ecosystem respiration(R_(eco)) were higher than those in wet stage. In addition,the drying and wetting cycles suppressed the nighttime CO_2 release from the salt marsh but increased its temperature sensitivity.

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