期刊
MARINE POLLUTION BULLETIN
卷 136, 期 -, 页码 309-321出版社
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.marpolbul.2018.09.013
关键词
Bacterial community; Surface water; River outlets; Pearl River Estuary; Spatio-temporal distribution; Functional diversity
资金
- Central Public-interest Scientific Institution Basal Research Fund, CAFS [2017HY-ZD0207]
- Special Scientific Research Fund for Central Non-profit Institutes, Chinese Academy of Fishery Sciences [2015A01YY02]
- Guangxi Natural Science Foundation [2013DXNSFEA053003]
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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