Abstract
The degradation of permafrost as a result of the development of destructive cryogenic processes leads to the fact that microorganisms, which for a long time were preserved in the permafrost strata, are carried out into modern aquatic biocenoses, belonging to earlier geological epochs with different climatic and ecological conditions than modern ones. The aim of the work was to study the influence of the metabolites of bacteria of the genera Bacillus, Pseudomonas, Acinetobacter, Listeria, isolated from the permafrost of the Subarctic zone of Russia, on the morphophysiological parameters of the unicellular hydrobionts Paramecium caudatum Ehrenberg . It has been shown that the secondary metabolites of bacteria of ancient natural cryolithozone ecosystems may have a negative effect on the physiological parameters of single-cell hydrobionts. The bacterial metabolites obtained at different temperatures vary in the severity of the effects on the biological parameters of Paramecium caudatum Ehrenberg . Secondary metabolites of bacteria, obtained at a temperature of +4 °C, in most cases have a less pronounced toxic effect. Considering global climate change in the direction of warming and anthropogenic conditions leading to the degradation of permafrost and subsequent removal of microorganisms into aquatic biocenoses, it is necessary to systematically monitor the aquatic environment to determine the biological activity of both microorganisms and their metabolites with the purpose of predicting possible environmental impacts.
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Acknowledgements
The work was carried out according to the state project, according to the Research Plan of the Tyumen Scientific Center of the SB RAS for 2018–2020, Protocol No. 2 of December 8, 2017 (Priority IX.133 Program IX.133.1 Project: IX.133.1.4 Cryobiological processes on land and in the coastal part of the Kara Sea in conditions of increasing average annual temperatures).
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Subbotin, A., Petrov, S., Gnatchenko, L., Narushko, M. (2019). Microbiological Monitoring of Cryohydrological Geosystems of the Cryolithozone. In: Sun, R., Fei, L. (eds) Sustainable Development of Water and Environment. ICSDWE 2019. Environmental Science and Engineering(). Springer, Cham. https://doi.org/10.1007/978-3-030-16729-5_1
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DOI: https://doi.org/10.1007/978-3-030-16729-5_1
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