Effects of chemical characteristics of groundwater on microbial community structures in the Liuli River
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Abstract:
Nine groundwater samples in the Liuli River and its surrounding areas in Beijing were taken to investigate the effects of characteristics of regional groundwater chemistry on microbial community.Characteristics of groundwater chemistry were examined,and the V4-V5 region of 16S rRNA was scanned by the high throughput sequencing.The correlation between groundwater chemical characteristics and microbial community structure were then explored.The results of hydrochemistry showed that HCO_3-Ca·Mg、HCO_3·Cl-Ca、HCO_3·Cl·SO_4-Ca and HCO_3-Ca were found and the main type is HCO_3-Ca·Mg in the study area.Microbial analysis results showed that Proteobacteria was the predominant phylum and predominant gene was not found in the study area.The microbial diversity from different types of groundwater showed that the level of microbial diversity increased with complexity of groundwater chemical types.A total of 113 genera were found in the four chemical types of groundwater,and the numbers of microorganisms in HCO_3-Ca·Mg、HCO_3·Cl-Ca、HCO_3·Cl·SO_4-Ca and HCO_3-Ca were 186,32,33 and 2,respectively.The order of groundwater impact on microbial community was turbidity>EC>DO>pH.The turbidity,Pseudomonas,Vogesella and Hydrogenophaga were benefited from Higher EC and DO values,and the Gallionella and Nitrospira were stimulated by moderate increase of pH.In summary, the characteristics of regional groundwater chemistry had significant effects on microbial community.
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