Seasonal dynamics of bacterial communities in the surface seawater around subtropical Xiamen Island, China, as determined by 16S rRNA gene profiling
2019
Wang, Yu | Liu, Yanting | Wang, Jianning | Luo, Tingwei | Zhang, Rui | Sun, Jia | Zheng, Qiang | Jiao, Nianzhi
This study investigated the microbial structure in the surface seawater from five coastal sites around Xiamen Island, China, over four seasons to evaluate seasonal environmental fluctuations impact on them. This subtropical island is characterized by long, hot, humid summers, and short, mild, dry winters. All sites were dominated by Proteobacteria, Bacteroidetes, Cyanobacteria, and Firmicutes; microbial community composition was similar across four seasons. However, larger proportions of Gammaproteobacteria and Bacillus were observed during the summer than during any other season. The high ratio of Bacillus, Bacteroidetes, and Clostridia richness to Alphaproteobacteria richness in the summer, suggested that the sites we tested were heavily affected by waste water to other seasons. Correlation-based network analyses among the bacterial species and environmental variables indicated important connections between physiochemical variables and specific taxonomic groups. Collectively, our results suggested that seasonal shifts and wastewater pollution together shape the structures of the microbial communities around Xiamen Island.
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