Bacterial Diversity and Functional Activity of Microbial Communities in Hot Springs of the Baikal Rift Zone

High Potential for Biomass-Degrading Enzymes Revealed by Hot Spring Metagenomics

“…This result was supported by mesophilic samples being significantly higher than either thermophilic and hyperthermophilic samples for both observed taxa and Shannon Diversity ( p < 0.001, Figures 2A,B and Supplementary Table 3 lists diversity metrics for each metagenome while Supplementary Table 4 contains statistical comparisons and p -values for each category tested). Several studies have found similar results of decreased α-diversity with increased temperature using 16S rRNA gene amplicon sequencing in hot springs ( De León et al, 2013 ; Sharp et al, 2014 ; Lavrentyeva et al, 2018 ).…”

“…In contrast, the only pH comparisons that were significantly different were highly acidic samples to neutral and alkaline samples ( p = 0.006) ( Supplementary Table 4 ). As temperature increases and pH shifts to either end of the spectrum, microbial diversity has been observed to decrease in thermal systems ( De León et al, 2013 ; Sharp et al, 2014 ; Menzel et al, 2015 ; Lavrentyeva et al, 2018 ; Power et al, 2018 ; Podar et al, 2020 ), an observation that is consistent with soils ( Lauber et al, 2009 ). The notion that photosynthetic microorganisms are typically absent at temperatures >74°C due to the instability of pigments at such high temperatures explains the significance between thermophilic and hyperthermophilic communities.…”

The experience of application of microbiological indicators in monitoring procedures of aquatic ecosystems in the Middle Ob basin

“…Last decades a great number or researches were carried out in Eurasia in various spheres of aquatic microbiology. They were mostly situated in the eastern and central part of Eurasia on waterbodies of high environmental or economic importance, such as the Baikal Lake [1][2], the Amur river [3][4], the reservoirs of the Volga river basin [5][6][7][8], lakes in Eastern Siberia and Mongolia [9][10] etc. The results of these studies reveal various data on the biological diversity of microorganisms and their metabolic activity, as well as trophic relationships between different groups of microorganisms in water bodies, frequently in relation to the ecological state, water quality and even pollution level.…”

Microbial community diversity in hot springs of the Baikal rift zone

“…Terrestrial hot springs are extreme ecosystems and convenient model system for studying the ecology of prokaryotes by the constancy of chemical composition and temperature (Sand, 2003;Coman et al, 2013;Badhai et al, 2015).…”

“…Hot springs of the Baikal Rift Zone (BRZ) are characterized by high temperatures and high pH values favorable for the development of thermophilic and alkaliphilic prokaryotes (Zaitseva et al, 2004;Kublanov et al, 2009;Lavrentieva et al, 2009;2018;Namsaraev et al, 2010;Radnagurueva et al, 2016).…”