Wang Zong-Lin, Wu Yan-You, Xing De-Ke, Liu Rong-Cheng, Zhao Kuan
Ying Yong Sheng Tai Xue Bao. 2014 Sep;25(9):2563-8.
Mangrove wetland ecosystem in Quanzhou Bay in Fujian Province is newly restored with a regular semidiurnal tide. Soil CO2 concentration in the mangrove soil was determined by Li-840 portable gas analyzer, and periodic characteristics of soil CO2 emission was investigated. The soil CO2 flux in the wetland soil was relatively small because the mangrove was young. The change trends of soil CO2 concentration and flux with time were consistent in Kandelia obovate and Aegiceras corniculatum communities in the intertidal periods. The CO2 concentration and flux in the wetland soil were 557.08-2211.50 μmol · mol(-1) and -0.21-0.40 μmol · m(-2) · s(-1), respectively. The average CO2 flux in the wetland soil was 0.26 μmol · mol(-1) · s(-1) in the intertidal of morning and evening tides (early intertidal) and -0.01 μmol · m(-2) · s(-1) in the intertidal of evening and morning tides (late intertidal), respectively. At the same time after the tide, the concentration and flux of CO2 in the mangrove soil in early intertidal was higher than that in late intertidal. In early intertidal, the relationship between the flux and instantaneous concentration of CO2 in the wetland soil was expressed as a bell-shaped curve, and CO2 flux increased first and then decreased with the increasing CO2 concentration, which was in conformity with Gaussian distribution.
福建省泉州湾的红树林湿地生态系统是新恢复的，受潮汐影响，为规则半日潮。利用Li-840便携式气体分析仪测定红树林土壤中的土壤二氧化碳浓度，并研究土壤二氧化碳排放的周期性特征。由于红树林尚处于幼年期，湿地土壤中的土壤二氧化碳通量相对较小。在潮间期，秋茄群落和桐花树群落中土壤二氧化碳浓度和通量随时间的变化趋势是一致的。湿地土壤中的二氧化碳浓度和通量分别为557.08 - 2211.50 μmol·mol(-1)和 -0.21 - 0.40 μmol·m(-2)·s(-1)。在早晚潮的潮间带（早潮间带），湿地土壤中的平均二氧化碳通量为0.26 μmol·mol(-1)·s(-1)，在晚早潮的潮间带（晚潮间带）为 -0.01 μmol·m(-2)·s(-1)。在涨潮后的同一时间，早潮间带红树林土壤中二氧化碳的浓度和通量高于晚潮间带。在早潮间带，湿地土壤中二氧化碳通量与瞬时浓度之间的关系呈钟形曲线，随着二氧化碳浓度的增加，二氧化碳通量先增加后减少，符合高斯分布。
