Microbial Community Responses and Nitrogen Cycling in the Nitrogen-Polluted Urban Shi River Revealed by Metagenomics DOI Creative Commons
Ran Wang, Shang Fa Yang, Wei Zhao

и другие.

Microorganisms, Год журнала: 2025, Номер 13(5), С. 1007 - 1007

Опубликована: Апрель 27, 2025

Nitrogen pollution in urban rivers, exacerbated by rapid urbanization, poses a growing threat to water quality. Microbial communities are essential mediating nitrogen cycling and mitigating these ecosystems. This study integrated three-year (2021–2023) quality monitoring with metagenomic sequencing investigate microbial community dynamics, processes, their responses the Shi River, Qinhuangdao, China. was predominantly derived from industrial discharges enterprises River Reservoir upstream (e.g., coolant chemical effluents), agricultural runoff, untreated domestic sewage (particularly catering waste Pantao Valley), livestock farming effluents. Total (TN) concentrations ranged 2.22 6.44 mg/L, exceeding China’s Class V standard (2.0 GB 3838-2002), highest level at urbanized W4 site (6.44 mg/L). Nitrate (NO3-N) accounted for 60–80% of TN. Metagenomic analysis revealed Fragilaria, Microcystis, Flavobacterium thriving (up 15% relative abundance) under stress, metabolism genes (narG, nifH, nirK) enriched polluted sites (W2, W4), narG reaching 26% W1. Dissolved oxygen positively correlated nitrate reductase gene abundance, while ammonia inhibited it. Burkholderiales Limnohabitans dominated denitrification, offering insights into sustainable river management.

Язык: Английский

Microbial Community Responses and Nitrogen Cycling in the Nitrogen-Polluted Urban Shi River Revealed by Metagenomics DOI Creative Commons
Ran Wang, Shang Fa Yang, Wei Zhao

и другие.

Microorganisms, Год журнала: 2025, Номер 13(5), С. 1007 - 1007

Опубликована: Апрель 27, 2025

Nitrogen pollution in urban rivers, exacerbated by rapid urbanization, poses a growing threat to water quality. Microbial communities are essential mediating nitrogen cycling and mitigating these ecosystems. This study integrated three-year (2021–2023) quality monitoring with metagenomic sequencing investigate microbial community dynamics, processes, their responses the Shi River, Qinhuangdao, China. was predominantly derived from industrial discharges enterprises River Reservoir upstream (e.g., coolant chemical effluents), agricultural runoff, untreated domestic sewage (particularly catering waste Pantao Valley), livestock farming effluents. Total (TN) concentrations ranged 2.22 6.44 mg/L, exceeding China’s Class V standard (2.0 GB 3838-2002), highest level at urbanized W4 site (6.44 mg/L). Nitrate (NO3-N) accounted for 60–80% of TN. Metagenomic analysis revealed Fragilaria, Microcystis, Flavobacterium thriving (up 15% relative abundance) under stress, metabolism genes (narG, nifH, nirK) enriched polluted sites (W2, W4), narG reaching 26% W1. Dissolved oxygen positively correlated nitrate reductase gene abundance, while ammonia inhibited it. Burkholderiales Limnohabitans dominated denitrification, offering insights into sustainable river management.

Язык: Английский

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