湿地园小型水体温室气体浓度和通量的时空特征

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Abstract This study selected Shenzhen Baguang wetland park as the study area. A one-year sampling program was conducted within three types of water bodies, i.e., ditches, ponds and estuaries. Measured data were used to investigate the seasonal and spatial pattern of greenhouse gas and its driving factors in the typical small water body within highly urbanized area. The results showed that the average concentrations of dissolved CO₂, CH₄, and N₂O in the water were (54.30±49.55), (0.89±1.45), and (0.0038±0.0007) μmol/L, respectively. The average fluxes of CO₂, CH₄, and N₂O emission were (113.94±424.19), (1.48±3.84), and (0.0044±0.0176) mg/(m²·h), respectively, implying a source of greenhouse gas to atmosphere. The emission potential of CO₂ from these small water bodies was much higher than coastal waters, lakes and other waters, and was the main contributor (85.57%) to the global warming within the entire wetland park water. From the perspective of spatial and temporal heterogeneity, greenhouse gas concentrations and fluxes showed a pattern of warm season (August) > cool season (January, April, December), ditches > ponds and estuaries, and were higher near the middle of the wetland park. Salinity, pH, ammonium nitrogen, nitrate, electrical conductivity, chemical oxygen demand, and total organic carbon were the critical environmental factors contributing to differences in dissolved greenhouse gas concentrations in the water. EC was the critical environmental factor influencing greenhouse gas fluxes.

Key words： small wetlands landscape water CO₂ CH₄ N₂O environmental factors

Received: 06 January 2024

PACS:

X51

Corresponding Authors: 高常军,副研究员,gaochangjun015@163.com E-mail: gaochangjun015@163.com

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	XU Mei-li
	MA Jiao-jiao
	LI Jia-hong
	YI Xiao-qing
	GAO Chang-jun

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XU Mei-li,MA Jiao-jiao,LI Jia-hong等. Seasonal and spatial pattern of greenhouse gas concentration and emission flux in small water body of wetland park[J]. CHINA ENVIRONMENTAL SCIENCECE, 2024, 44(8): 4567-4575.

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http://www.zghjkx.com.cn/EN/ OR http://www.zghjkx.com.cn/EN/Y2024/V44/I8/4567

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