Work

Effect mechanism of nutrients on pathogenic bacteria at the sediment-water interface in eutrophic water

Year: 2024

Type: article

Abstract: This research analyzed the structure of microbial groups in the sediment–water interface (SWI) and the relationship between the gene expression levels of two typical pathogenic bacteria Escherichia coli and Enterococcus, and nutrient levels using modern biological techniques. The nutrient distribution at the SWI revealed significantly higher nutrient content in the sediment compared to the overlying water. According to Fick’s first law, the release flux indicated that PO43−-P in the upper reaches of the reservoir was deposited from the overlying water, while the release rate of NH4+-N, in addition to sedimentation, was significantly greater than that of PO43−P. The microbial community structure was primarily dominated by the genera Methyloparacoccus, Methylomonas, and Arenimonas. The abundances of E. coli and Enterococcus were higher in the surface sediment than in the overlying water. Pearson correlation analysis demonstrated that E. coli had a significant positive correlation with total nitrogen (TN) (p < 0.05) and total phosphorus (TP) (p < 0.05), whereas Enterococcus had a very significant positive correlation with TN and TP (p < 0.01).

Source: Frontiers in Environmental Science

DOI: 10.3389/fenvs.2024.1396772

Authors: Sun Wen, Zhang Yang, Peng Biao, Wang Jing, Wei Yuansong, Liu Jibao

Institutions: Ministry of Natural Resources, Shaanxi Provincial Land Engineering Construction Group, Xi'an Jiaotong University, Chinese Academy of Sciences

Language: English

Topic: Fecal contamination and water quality

Subfield: Water Science and Technology

Field: Environmental Science

Domain: Physical Sciences

SDG: Clean water and sanitation

Open Access status: gold

Estimated APC paid: $3,295