| Abstrakt: |
High fluoride groundwater is not only harmful to the human body but also affects microbial community structure. To explore the influence of high fluoride groundwater environment on microbial diversity, 15 groups of groundwater samples were collected from Kuitun River Basin and subjected to high-throughput 16S rDNA gene sequencing, with the analysis focused on the chemical characteristics of high and low fluoride groundwater, microbial community structure, and the relationship between microbial community and environment. The results showed that the groundwater in the study area had weak alkalinity, and relatively high total dissolved solids (TDS). The average fluoride (F-) content was 1.5 mg/L, and the groundwater type was identified as HCO3·SO4-Na. The low fluoride group samples exhibited higher species abundance and diversity with similar microbial communities. In contrast, the high fluoride group samples displayed significant differences in microbial communities. Proteobacteria, Actinobacteria, and Bacteroidetes were identified as the dominant bacterial phyla in the groundwater. At the family level, the dominant bacteria belong to Proteobacteria. The concentrations of chemical oxygen demand (COD), TDS, and F- were found to be significantly correlated with the microbial community structure in groundwater, and these concentrations were negatively correlated with the abundance of most bacterial phyla. This study demonstrated that high fluoride groundwater environment suppressed the abundance and diversity of microorganisms. However, the microbial community was able to mitigate the toxicity of high fluoride groundwater through metabolic pathways, leading to the formation of a unique microbial community structure. These findings highlight the importance of microbial community self-regulation in the prevention and control of high fluoride groundwater pollution. [ABSTRACT FROM AUTHOR] |
