Taxonomic Diversity of the Microbial Community in the Kuchiger Thermal Spring (Baikal Rift Zone)
E. V. LAVRENTYEVA1,2, A. A. RADNAGURUEVA1, O. A. BATURINA3, V. V. KHAKHINOV2
1Institute of General and Experimental Biology SB RAS, Ulan-Ude, Russia
2Buryat State University named by D. Banzarova, Ulan-Ude, Russia
3Institute of Chemical Biology and Fundamental Medicine SB RAS, Novosibirsk, Russia
Keywords: thermal spring, taxonomic diversity of the microbial community, high throughput sequencing, 16S rRNA gene
Abstract
The hydrochemical and microelement composition of water and bot tom sediments was determined in the Kuchiger thermal spring (Baikal rift zone). The entry of chemicals with groundwater and high temperatures create favorable and specific conditions for the development of microorganisms. The taxonomic diversity of the microbial community of water and bottom sediments was studied using the analysis of 16S rRNA gene aplicons. 107619 nucleotide sequences assigned to 211 OTUs were analyzed. In the studied samples of water and bottom sediments, bacteria dominated, representatives of archaea accounted for 0.2-3.1 %. The phylum Proteobacteria dominated in microbial communities. The subdominants in the studied samples were the phyla Firmicutes, Chloroflexi, Nitrospirae, Acetothermia, and Actinobacteria, where their ratio varied depending on the biotope. A characteristic feature of the microbial community in the Kuchiger thermal spring is the dominance of chemolithotrophic bacteria.
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