南通沿海潮间带土-气界面CO<sub>2</sub>交换特征

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Abstract

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.

Key words： intertidal zone bare tidal flat carbon flux photosynthesis

Received: 12 July 2017

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	Articles by authors
	WANG Peng
	WANG Yi-dan
	SHEN Xia
	WANG Chen-xin
	HUA Zu-lin
	WANG Sheng-yan

Cite this article:

WANG Peng,WANG Yi-dan,SHEN Xia等. Characteristics of soil-air CO₂ exchange fluxes in intertidalite of Nantong[J]. CHINA ENVIRONMENTAL SCIENCECE, 2018, 38(2): 675-682.

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http://www.zghjkx.com.cn/EN/ OR http://www.zghjkx.com.cn/EN/Y2018/V38/I2/675

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