A5012494046- Geology and Paleoclimatology Research
- Methane Hydrates and Related Phenomena
- Microbial Community Ecology and Physiology
- Geological Studies and Exploration
- Marine and coastal ecosystems
- Marine and environmental studies
- Genomics and Phylogenetic Studies
- Isotope Analysis in Ecology
- Climate change and permafrost
- Geomagnetism and Paleomagnetism Studies
- Archaeology and ancient environmental studies
- Geological and Geochemical Analysis
- Hydrocarbon exploration and reservoir analysis
- Aquatic and Environmental Studies
- Fire effects on ecosystems
- Aquatic Ecosystems and Phytoplankton Dynamics
- Arctic and Antarctic ice dynamics
- Diatoms and Algae Research
- Protist diversity and phylogeny
- Bacteriophages and microbial interactions
- Atmospheric and Environmental Gas Dynamics
- Geochemistry and Geologic Mapping
- earthquake and tectonic studies
- Aeolian processes and effects
- Polar Research and Ecology
Institute of Biophysics
2016-2025
Siberian Federal University
2012-2025
Russian Academy of Sciences
2009-2025
Czech Academy of Sciences, Institute of Biophysics
2009-2024
Siberian Branch of the Russian Academy of Sciences
2014-2024
Krasnoyarsk Scientific Center
2020-2023
Institute of Physics
2017
Institute of Physics of the Slovak Academy of Sciences
2017
Limnological Institute
2014
Meromictic lakes located in landlocked steppes of central Asia (~2500 km inland) have unique geophysiochemical characteristics compared to other meromictic lakes. To characterize their bacteria and elucidate relationships between those surrounding environments, water samples were collected from three saline (Lakes Shira, Shunet Oigon) the border Siberia West Mongolia, near center Asia. Based on in-depth tag pyrosequencing, bacterial communities highly variable dissimilar among oxic anoxic...
Abstract We studied a 2200-year-old sediment core from Lake Zapovednoye, small, deep, freshwater lake near the site of 1908 Tunguska impact event. Analysis for geochemistry, pollen, chironomids, Cladocera, and diatoms revealed traces climatic fluctuations during investigated time period which cool climate before 1000 CE was replaced by Medieval Climatic Optimum, Little Ice Age, finally modern warming. An increased content terrigenous elements identified at depth corresponding to ca. CE. This...
A feature of meromictic lakes is that several physicochemical and biological gradients affect the vertical distribution different organisms. The stratification physical, chemical components in saline, fishless Shira Shunet (Siberia, Russia) quite mainly because both mean depth maximum differ as well their salinity levels differ. chemocline Lake Shira, many lakes, inhabited by bacterial community consisting purple sulphur heterotrophic bacteria. As variable, does not attain high densities....
In a brackish, temperate, 24-m-deep Lake Shira, the profiles of salinity, temperature, oxygen and sulfide concentrations were measured on seasonal basis from 2002 to 2009. The lake was shown be meromictic with autumnal overturn restricted mixolimnion. depth mixolimnion position oxic–anoxic interface varied annually. spring mixing processes contribute formation in autumn. exceptionally windy 2007 caused deepening winter 2008. affected by lower boundary all winters. salinity increased compared...
Strain AIS(T), an aerobic halophilic, Gram-reaction-negative, heterotrophic bacterium isolated from the water of Shira Lake in Khakasia, southern Siberia, was characterized using a polyphasic approach. Our analysis 16S rRNA gene sequences showed that 'Aliidiomarina haloalkalitolerans', sanyensis', Idiomarina maris and AIS(T) formed distinct lineage. The sequence similarities between type strains species genera Aliidiomarina were 91.6-95.1 % 94.0-96.9 %, respectively. major isoprenoid quinone...
Abstract Most of Earth’s bacteria have yet to be cultivated. The metabolic and functional potentials these uncultivated microorganisms thus remain mysterious, the metagenome-assembled genome (MAG) approach is most robust method for uncovering potentials. However, MAGs discovered by conventional metagenomic assembly binning are usually highly fragmented genomes with heterogeneous sequence contamination. In this study, we combined Illumina Nanopore data develop a new workflow reconstruct 233...
Climate change and other anthropogenic stressors have led to long-term changes in the thermal structure, including surface temperatures, deepwater vertical gradients, many lakes around world. Though studies highlight warming of water temperatures worldwide, less is known about trends full structure which been changing consistently both direction magnitude. Here, we present a globally-expansive data set summertime in-situ temperature profiles from 153 lakes, with one time series beginning as...
A psychrotolerant, methylotrophic methanogen, strain YSF-03T, was isolated from the saline meromictic Lake Shira in Siberia. Cells of YSF-03T were non-motile, irregular cocci and 0.8-1.2 µm diameter. The methanogenic substrates utilized by methanol trimethylamine. temperature range growth for 0 to 37 °C. optimum conditions 30-37 °C, pH 7.0-7.4 0.17 M NaCl. G+C content genome 41.3 mol%. Phylogenetic analysis revealed that most closely related Methanolobus profundi MobMT (98.15 % similarity...
In meromictic lakes such as Lake Shira, horizontal inhomogeneity is small in comparison with vertical gradients. To determine the distribution of temperature, salinity, and density water a deep zone or other saline lakes, one-dimensional (in direction) mathematical model presented. A special feature this that it takes into account process ice formation. The formation based on one-phase Stefan problem linear temperature solid phase. convective mixed layer formed under an cover due to salt...
Microorganisms are critical to maintaining stratified biogeochemical characteristics in meromictic lakes; however, their community composition and potential roles nutrient cycling not thoroughly described. Both metagenomics metaviromics were used determine the capacity of archaea, bacteria, viruses along water column landlocked Lake Shunet Siberia. Deep sequencing 265 Gb high-quality assembly revealed a near-complete genome corresponding Nonlabens sp sh3vir. viral sample 38 bacterial bins...