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首页> 外文期刊>Canadian journal of microbiology >Comparing sediment bacterial communities in the macrophyte-dominated and algae-dominated areas of eutrophic Lake Taihu, China.
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Comparing sediment bacterial communities in the macrophyte-dominated and algae-dominated areas of eutrophic Lake Taihu, China.

机译：比较中国富营养化太湖中以大型植物为主和以藻类为主的地区的沉积物细菌群落。

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Bacterial community structure and the effects of several environmental factors on bacterial community distribution were investigated in the sediment of the macrophyte-dominated and algae-dominated areas in a large, shallow, eutrophic freshwater lake (Lake Taihu, China). Surface sediment samples were collected at 6 sampling sites (3 sites from each of the 2 areas) on 15 February and 15 August 2009. Based on cluster analysis of the DGGE banding patterns, there were significant seasonal variations in the structure of the sediment bacterial community in the macrophyte- and algae-dominated areas, and site-specific variation within an area and between 2 areas. However, there were no significant between-area variations due to the large within-area variation. Analysis of DNA sequences showed that there were differences in the species composition of the sediment bacteria between the macrophyte- and algae-dominated area clone libraries. In the macrophyte-dominated area library, the bacterial community was dominated by Deltaproteobacteria, Verrucomicrobia, Acidobacteria, Bacteroidetes, Gammaproteobacteria, and Betaproteobacteria. OP10 was found in the library of this area but not in the algae-dominated area library. The algae-dominated area library was dominated by Betaproteobacteria, Deltaproteobacteria, Gammaproteobacteria, and Acidobacteria. Cyanobacteria, Alphaproteobacteria, and Planctomycetes were found in this area library but not in the macrophyte-dominated area library. Canonical correspondence analysis demonstrated that total phosphorus and water temperature were the dominant environmental factors affecting bacterial community composition in the sediment.
机译：在一个大型的，浅水的，富营养化的淡水湖（中国太湖）中，以大型植物为主和藻类为主的区域的沉积物中，研究了细菌群落结构以及几种环境因素对细菌群落分布的影响。 2009年2月15日和8月15日在6个采样点（两个地区各3个地点）采集了地表沉积物样本。基于DGGE条带分布的聚类分析，沉积物细菌群落的结构存在明显的季节性变化在大型植物和藻类为主的地区，以及一个区域内和两个区域之间的特定地点变异。但是，由于较大的区域内变化，因此没有明显的区域间变化。 DNA序列分析表明，在以大型植物和藻类为主的区域克隆库之间，沉积细菌的物种组成存在差异。在以大型植物为主导的区域库中，细菌群落主要由三角洲变形杆菌，Verrucomicrobia，酸性杆菌，拟杆菌，γ变形杆菌和Beta变形杆菌控制。在该地区的图书馆中发现了OP10，但在以藻类为主的地区的图书馆中却找不到。藻类占主导地位的地区文库由Beta变形杆菌，Delta变形杆菌，γ变形杆菌和酸杆菌主导。在该区域库中发现了蓝细菌，丙酸杆菌和扁平菌，但在以大型植物为主的区域库中却没有。典型的对应分析表明，总磷和水温是影响沉积物中细菌群落组成的主要环境因素。

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