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Seasonal and inter-annual variability of bacterioplankton communities in the subtropical Pearl River Estuary, China

文献类型： 外文期刊

作者： Mai, Yongzhan 1 ; Peng, Songyao 1 ; Lai, Zini 1 ; Wang, Xuesong 3 ;

作者机构： 1.Chinese Acad Fishery Sci, Pearl River Fisheries Res Inst, Guangzhou 510380, Peoples R China

2.Guangdong Prov Key Lab Aquat Anim Immune Technol, Guangzhou 510070, Peoples R China

3.Guangdong Acad Sci, Inst Anal, Guangdong Prov Key Lab Emergency Test Dangerous C, China Natl Analyt Ctr Guangzhou, 100 Xianlie Middle Rd, Guangzhou 510070, Peoples R China

关键词： Bacterioplankton community; Seasonal succession; Environmental parameters; Microbial indicators; Pearl River Estuary

期刊名称：ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH （ 影响因子：4.223； 五年影响因子：4.306 ）

ISSN： 0944-1344

年卷期：

页码：

收录情况： SCI

摘要： It is widely recognized that environmental factors substantially influence on the seasonal and inter-annual variability of bacterioplankton communities, yet little is known about the seasonality of bacterioplankton communities in subtropical estuaries at longer-term time scales. Here, the bacterioplankton communities from the eight major outlets of the subtropical Pearl River Estuary were investigated across 3 years (2017-2019) using full-length 16S rRNA gene sequencing. Significant seasonal and inter-annual variation was observed in bacterioplankton community compositions across the 3 years (p < 0.05). In addition, the inferred functional composition of the communities varied with seasons, although not significantly, suggesting that functional redundancy existed among communities and across seasons that could help to cope with environmental changes. Five evaluated environmental parameters (temperature, salinity, pH, total dissolved solids (TDS), total phosphorus (TP)) were significantly correlated with community composition variation, while only three environmental parameters (temperature, pH, and TDS) were correlated with variation in inferred functional composition. Moreover, community composition tracked the seasonal temperature gradients, indicating that temperature was a key environmental factor that affected bacterioplankton community's variation along with seasonal succession patterns. Gammaproteobacteria and Alphaproteobacteria were the most dominant classes in the surface waters of Pearl River Estuary, and their members exhibited divergent responses to temperature changes, while several taxa within these group could be indicators of low and high temperatures that are associated with seasonal changes. These results strengthen our understanding of bacterioplankton community variation in association with temperature-dependent seasonal changes in subtropical estuarine ecosystems.

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