Characteristics of soil-air CO2 exchange fluxes in intertidalite of Nantong
WANG Peng1,2, WANG Yi-dan1, SHEN Xia3,4, WANG Chen-xin1, HUA Zu-lin1,2, WANG Sheng-yan5
1. College of Environment, Hohai University, Nanjing 210098, China;
2. National Engineering Research Center of Water Resources Efficient Utilization and Engineering Safety, Hohai University, Nanjing 210098, China;
3. Nanjing Hydraulic Research Institute, Nanjing 210029, China;
4. State Key Laboratory of Hydrology-Water Resources and Hydraulic Engineering, Hohai University, Nanjing 210098, China;
5. Taizhou Branch, Jiangsu Province Hydrology and Water Resources Investigation Bureau, Taizhou 225300, China
The CO2 flux was measured by a portable soil flux measurement system at a bare tidal flat, where is close to Xiexing Port of Nantong. The relationship between the characteristics of carbon flux and their determinants on a non-vegetation area was explored. The results showed that the abilities of carbon fixation for different intertidal zones are the high intertidal < middle intertidal < low intertidal. It might be because of the higher contents of chlorophyll a in the low intertidal zones and higher CO2 absorbing ability. Meanwhile, the organic carbon contents and the CO2 emission fluxes esulting from microbial respiration in the high intertidal zone were the highest. It was a net CO2 fixation for the whole research area. In addition, CO2 net fixation fluxes decreased with the increase of organic carbon content in the soil and the duration of the ebb tide, closely related to the chlorophyll a content and the groundwater. Our findings highlight the importance of human activities in shaping the carbon cycling in the bare flats of the intertidal zones in Jiangsu province.
王鹏, 王一丹, 申霞, 王晨昕, 华祖林, 王胜艳. 南通沿海潮间带土-气界面CO2交换特征[J]. 中国环境科学, 2018, 38(2): 675-682.
WANG Peng, WANG Yi-dan, SHEN Xia, WANG Chen-xin, HUA Zu-lin, WANG Sheng-yan. Characteristics of soil-air CO2 exchange fluxes in intertidalite of Nantong. CHINA ENVIRONMENTAL SCIENCECE, 2018, 38(2): 675-682.
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