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Taxonomic Diversity and Size-Morphological Structure of Bacterioplankton of the Rybinsk Reservoir
Microbiology ( IF 1.5 ) Pub Date : 2021-06-08 , DOI: 10.1134/s002626172103005x
E. V. Kuznetsova , E. V. Sukhanova , D. B. Kosolapov

Abstract

This is the first report on investigation of bacterioplankton taxonomic composition in the Rybinsk Reservoir by molecular biological methods. A total of 58 nucleotide sequences obtained were assigned to 26 operational taxonomic units (OTUs), which belonged to Eubacteria (24 OTUs) and Eukaryota (2 OTUs). The diversity of bacterioplankton was represented by seven phyla of eubacteria: Proteobacteria, Bacteroidetes, Verrucomicrobia, Firmicutes, Actinobacteria, Gemmatimonadetes, and Acidobacteria. Predominant organisms were alphaproteobacteria of the species “Candidatus Fonsibacter ubiquis,” as well as unidentified members of the phyla Bacteroidetes and Verrucomicrobia, whose homologues are widespread in freshwater environments and have small genomes and cells. During the study period, small and medium-sized free-living cells predominated in bacterioplankton (70–99%), because they were the least vulnerable to eliminating control factors. The majority of the bacterial community was formed by cocci (50–80%), while a significant part of its biomass was accounted for by small rods (up to 2 μm in length) (20–30%).



中文翻译:

雷宾斯克水库浮游细菌分类多样性及大小形态结构

摘要——

这是第一份利用分子生物学方法研究雷宾斯克水库浮游细菌分类组成的报告。获得的总共 58 个核苷酸序列被分配到 26 个操作分类单元 (OTU),它们属于真细菌(24 个 OTU) 和真核生物(2 个 OTU)。:浮游细菌的多样性被七个门类真细菌的代表变形菌拟杆菌疣微菌门厚壁菌门放线菌芽单胞菌门酸杆菌门。主要生物体是“Candidatus Fonsibacter ubiquis ”物种的α变形菌,”以及拟杆菌门和疣微菌门的身份不明成员,它们的同源物在淡水环境中广泛存在,并且具有小的基因组和细胞。在研究期间,中小型自由活细胞在浮游细菌中占主导地位(70-99%),因为它们最不容易消除控制因素。大多数细菌群落由球菌形成(50-80%),而其生物量的很大一部分由小杆(长达 2 μm)(20-30%)构成。

更新日期:2021-06-08
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