Response relationship between bacterial community structure and water quality in ground water fluctuating region
ZUO Rui1,2, LI Qiao1,2, MENG Li1,2, YANG Jie1,2, ZHAI Yuan-zheng1,2, WANG Jin-sheng1,2, TENG Yan-guo1,2
1. College of Water Sciences, Beijing Normal University, Beijing 100875, China;
2. Engineering Research Center of Groundwater Pollution Control and Remediation, Ministry of Education, Beijing 100875, China
This study aimed to reveal the characteristics of the bacterial community structure in the groundwater fluctuating region and its interaction with the groundwater environment in the First Water Resource in Harbin, Northeast China. Groundwater samples were collected for water chemical analysis and aquifer media samples at different depths in the fluctuating region (0~5m unsaturated zone and 6~50m saturated zone) for bacterial community analysis by 16Sr RNA. Redundancy analysis was used to indicate the correlation between groundwater quality parameters and the bacterial community. The main groundwater pollutants in the study area were Fe, Mn, NH4+ and organic matter. The excess of Fe and Mn was mainly related to the specific geological background of northeast China. The NH4+ and organic matter were mainly derived from human activities. There was a significant difference in the bacterial community structure between the unsaturated and saturated zones, and the abundance and diversity of the bacterial community in unsaturated zone were significantly higher than those of the saturated zone. Proteobacteria, Bacteroidetes, Actinobacteria, Firmicutes and Acidobacteria were the dominant bacteria in the study area, for which the accumulative relative abundance in the unsaturated and saturated zones was 82.89% and 98.64%, respectively. Bacteroidetes, Proteobacteria, Actinobacteria and Verrucomicrobia were closely related to groundwater quality evolution at the phylum level in the unsaturated zone, with contribution rates of 15%, 14.8%, 8.9% and 5.2%, respectively. Bacteroidetes, Acidobacteria, Actinobacteria and Firmicutes played a major role in the groundwater quality evolution process in the saturated zone, with contributions of 38.4%, 19.0%, 10.8% and 9.1%, respectively. Both Pseudomonas in the unsaturated zone and Flavobacterium in the saturated zone had a critical influence on the biotransformation of Fe, Mn and NH4+ at the genus level. This study provides a scientific basis for revealing the impact of biogeochemical effects on groundwater environment in groundwater fluctuating regions, and is of great relevance for groundwater pollution restoration.
左锐, 李桥, 孟利, 杨洁, 翟远征, 王金生, 滕彦国. 地下水波动带中细菌群落结构与水质响应关系[J]. 中国环境科学, 2020, 40(4): 1687-1697.
ZUO Rui, LI Qiao, MENG Li, YANG Jie, ZHAI Yuan-zheng, WANG Jin-sheng, TENG Yan-guo. Response relationship between bacterial community structure and water quality in ground water fluctuating region. CHINA ENVIRONMENTAL SCIENCECE, 2020, 40(4): 1687-1697.
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