To gain a better understanding of the microbial community in salt-freshwater mixing zones, in this study, the influence of seasonal variation on the groundwater microbial community was evaluated by high throughput 16S rDNA gene sequencing. The results showed that notable changes in microbial community occurred in a salt-freshwater mixing zone and the groundwater samples in the dry season were more saline than those in the wet season. The increase in precipitation during the wet season relieved local seawater intrusion. Microbial diversity varied greatly with seasons, while no obvious change pattern was found. Proteobacteria was identified as the dominant phylum in all samples. The genus Hydrogenophaga dominated in the dry season, while the genus Acidovorax dominated in the wet season. Dissolved oxygen affected the diversity of the microbial communities during the dry and wet season, while groundwater level had a strong influence on the structure of microbial communities. Phylogenetic molecular network analysis of the microbial communities indicated that increased seawater intrusion led to a more compact microbial network and strengthening the groundwater microbial interactions.

为了更好地了解盐与淡水混合区的微生物群落，在本研究中，通过高通量16S rDNA基因测序评估了季节性变化对地下水微生物群落的影响。结果表明，盐-淡水混合区微生物群落发生了显着变化，旱季的地下水盐度比湿季的盐度高。雨季降水的增加减轻了当地海水的入侵。微生物多样性随季节变化很大，而没有发现明显的变化模式。细菌鉴定为所有样品中的显性门。Hydrogenophaga属在旱季占主导地位，而Acidovorax属在雨季占主导地位。在干燥和潮湿的季节，溶解氧影响微生物群落的多样性，而地下水位对微生物群落的结构有很大的影响。对微生物群落的系统进化分子网络分析表明，海水入侵的增加导致微生物网络更加紧凑，并增强了地下水与微生物之间的相互作用。