Structural and functional shifts of bacterioplanktonic communities associated with spatiotemporal gradients in river outlets of the subtropical Pearl River Estuary, South China

文献类型： 外文期刊

第一作者： Mai, Yong-zhan

作者： Mai, Yong-zhan;Lai, Zi-ni;Li, Xin-hui;Peng, Song-yao;Wang, Chao

作者机构：

关键词： Bacterial community; Surface water; River outlets; Pearl River Estuary; Spatio-temporal distribution; Functional diversity

期刊名称：MARINE POLLUTION BULLETIN （ 影响因子：5.553； 五年影响因子：5.907 ）

ISSN： 0025-326X

年卷期： 2018 年 136 卷

页码：

收录情况： SCI

摘要： In this study, we used high-throughput sequencing of 16S rRNA gene amplicons, to investigate the spatiotemporal variation in bacterial communities in surface-waters collected from eight major outlets of the Pearl River Estuary, South China. Betaproteobacteria were the most abundant class among the communities, followed by Gammaproteobacteria, Alphaproteobacteria, Actinobacteria, and Acidimicrobiia. Generally, alpha-diversity increased in winter communities and the taxonomic diversity of bacterial communities differed with seasonal and spatial differences. Temperature, conductivity, salinity, pH and nutrients were the crucial environmental factors associated with shifts in the bacterial community composition. Furthermore, inferred community functions that were associated with amino acid, carbohydrate and energy metabolisms were lower in winter, whereas the relative abundance of inferred functions associated with membrane transport, bacterial motility proteins, and xenobiotics biodegradation and metabolism, were enriched in winter. These results provide new insights into the dynamics of bacterial communities within estuarine ecosystems.

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