Hydrological connectivity shape the nitrogen pollution sources and microbial community structure in a river-lake connected system DOI Creative Commons

Haoda Chen,

Lulu Zhang, Zhi‐Jie Zheng

et al.

Frontiers in Microbiology, Journal Year: 2025, Volume and Issue: 16

Published: April 11, 2025

Intensified agricultural and urban activities have exacerbated nitrogen pollution, posing a severe threat to freshwater ecosystems, particularly under intensified urbanization activities. This study systematically examined Baiyangdian Lake (BYD) its principal inflowing rivers, namely Fu River (FH), Baigouyin (BGY), Xiaoyi (XY) characterize the spatio-temporal distribution, primary sources, impact on sediment microbial community structure. Results indicated pronounced seasonal variations in both pollution loads with riverine levels rising markedly from dry season (May) wet (August). Atmospheric deposition accounted for 43.9% of input season, whereas fertilizers sewage contributed 23.3 26.4%, respectively. Additionally, communities exhibited distinct temporal spatial patterns, significantly higher diversity species richness being during season. The, composition shifted, as evidenced by decline Proteobacteria increases Firmicutes Actinobacteriota . River-lake connectivity emerged critical factor, FH displaying notably index compared BGY XY rivers. Structural equation modeling (SEM) analysis further revealed that river-lake was positively correlated negatively α-diversity. These findings demonstrated directly influenced concentrations, which turn indirectly modulated diversity.

Language: Английский

Water-lifting aerator coupled with sponge iron-enhanced biological aerobic denitrification to remove nitrogen in low C/N water source reservoirs: effect and mechanism. DOI

Quanjie Du,

Xuanzi Zhangsun,

Jian Cao

et al.

Environmental Research, Journal Year: 2025, Volume and Issue: unknown, P. 121557 - 121557

Published: April 1, 2025

Language: Английский

Citations

0
Hydrological connectivity shape the nitrogen pollution sources and microbial community structure in a river-lake connected system DOI Creative Commons

Haoda Chen,

Lulu Zhang, Zhi‐Jie Zheng

et al.

Frontiers in Microbiology, Journal Year: 2025, Volume and Issue: 16

Published: April 11, 2025

Intensified agricultural and urban activities have exacerbated nitrogen pollution, posing a severe threat to freshwater ecosystems, particularly under intensified urbanization activities. This study systematically examined Baiyangdian Lake (BYD) its principal inflowing rivers, namely Fu River (FH), Baigouyin (BGY), Xiaoyi (XY) characterize the spatio-temporal distribution, primary sources, impact on sediment microbial community structure. Results indicated pronounced seasonal variations in both pollution loads with riverine levels rising markedly from dry season (May) wet (August). Atmospheric deposition accounted for 43.9% of input season, whereas fertilizers sewage contributed 23.3 26.4%, respectively. Additionally, communities exhibited distinct temporal spatial patterns, significantly higher diversity species richness being during season. The, composition shifted, as evidenced by decline Proteobacteria increases Firmicutes Actinobacteriota . River-lake connectivity emerged critical factor, FH displaying notably index compared BGY XY rivers. Structural equation modeling (SEM) analysis further revealed that river-lake was positively correlated negatively α-diversity. These findings demonstrated directly influenced concentrations, which turn indirectly modulated diversity.

Language: Английский

Citations

0