太湖周边地下水中高硝酸盐负荷促进反硝化功能菌群富集

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Abstract The denitrifying functional bacteria community plays a crucial role in the degradation of nitrate pollution. However, the understanding of the relationships between its interspecies links and nitrate load is still limited. Groundwater resources in the vicinity of Lake Taihu serve as vital reserves, yet in some areas, nitrate load in groundwater exceeds health thresholds. This paper focused on 14 groundwater samples with varying nitrate concentrations from the Lake Taihu area. With microbial sequencing techniques, the diversity of bacterial communities in groundwater was explored, and the denitrifying functional bacteria community was identified. The response of interspecies links within the denitrifying functional bacteria community to nitrate load was investigated by co-occurrence network analysis. The results indicate: Significant differences were found in bacterial community composition between high and low nitrate samples; The α-diversity and β-diversity were highly influenced by nitrate load; Interspecies links within the denitrifying functional bacteria community in the high nitrate samples were denser than those in the low nitrate samples. This study demonstrates that nitrate load in groundwater significantly influences the interspecies links within the denitrifying functional bacteria community, providing new insights into the interplay between groundwater denitrifying functional bacteria community and nitrate load in the Lake Taihu area.

Key words： Lake Taihu groundwater microbial diversity nitrate co-occurrence network

Received: 14 June 2024

PACS:	X172
	X523

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	Articles by authors
	WANG Zhuo-qun
	CHEN Kou-ping
	WU Ji-chun
	WANG Bao-zhan
	LIU Xu

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WANG Zhuo-qun,CHEN Kou-ping,WU Ji-chun等. High nitrate load in lakeside groundwater around Lake Taihu promotes the enrichment of denitrifying functional bacteria community[J]. CHINA ENVIRONMENTAL SCIENCECE, 2025, 45(1): 477-486.

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http://www.zghjkx.com.cn/EN/ OR http://www.zghjkx.com.cn/EN/Y2025/V45/I1/477

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