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Different Assembly Patterns of Planktonic and Sedimentary Bacterial Community in a Few Connected Eutrophic Lakes

文献类型： 外文期刊

作者： Xia, Ming 1 ; Xiong, Fei 1 ; Li, Xuemei 3 ; Li, Dunhai 4 ; Wang, Zhicong 4 ; Zhai, Dongdong 1 ; Liu, Hongyan 1 ; Chen, Yuanyuan 1 ; Yu, Jixin 1 ; Wang, Ying 1 ;

作者机构： 1.Jianghan Univ, Sch Life Sci, Hubei Engn Res Ctr Protect & Utilizat Special Bio, Wuhan 430056, Peoples R China

2.Jianghan Univ, Hubei Key Lab Environm & Hlth Effects Persistent, Wuhan 430056, Peoples R China

3.Chinese Acad Fishery Sci, Minist Agr, Yangtze River Fisheries Res Inst, Key Lab Freshwater Biodivers Conservat & Utilizat, Wuhan 430223, Peoples R China

4.Chinese Acad Sci, Inst Hydrobiol, State Key Lab Freshwater Ecol & Biotechnol, Wuhan 430072, Peoples R China

关键词： bacterial community assembly; eutrophication; freshwater lake; stochastic process; deterministic process

期刊名称：WATER （ 影响因子：3.53； 五年影响因子：3.628 ）

ISSN：

年卷期： 2022 年 14 卷 5 期

页码：

收录情况： SCI

摘要： The mechanism of bacterial community assembly has been the hot spot in the field of microbial ecology and it is difficult to quantitatively estimate the influences of different ecological processes. Here, a total of 23 pairs of planktonic and sedimentary samples were collected from five lakes in Wuhan, China. significant higher alpha-diversity (p < 0.001) and beta-diversity (p < 0.001) of bacterial communities were observed in sediment than those in water. Some phylum had linear relationships with the comprehensive TSI (TSIc) by regression analysis. Non-metric multidimensional scaling (NMDS) and redundancy analysis (RDA) revealed that the depth of water, NO3--N, NH4+-N, PO4(3-), and CODcr were the key environmental variables in planktonic bacterial communities, whereas in sediment they were the depth, NO3--N, and NH4+-N. Furthermore, variation partitioning analysis (VPA) showed that spatial and environmental factors could only explain 40.2% and 27.9% of the variation in planktonic and sedimentary bacterial communities, respectively. More importantly, null model analysis suggested that different assembly mechanisms were found between in water and in sediment with the fact that planktonic bacterial community assembly was mainly driven by dispersal limitation process whereas variable selection process played a vital role in that of sediment.

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