Permafrost and ground ice of the Arctic, Antarctic and mountain regions
Karnysheva E.A., Filippova S.N., Brushkov A.V. —
Examination of the ability of microorganism cells to migration in various dispersion frozen rocks
// Arctic and Antarctica.
– 2019. – ¹ 1.
– P. 53 - 63.
DOI: 10.7256/2453-8922.2019.1.29226 URL: https://en. nbpublish.com/library_read_article.php?id=29226
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This article presents the results of model experiments on the ability of microorganism cells to migrate in pore space of the various dispersion frozen soils: Neogene sand of the Mammoth Mountain (Central Yakutia), quartz sand and kaolin clay at a fixed nedagive temperature (-6.5°C). Currently, there are known the basic parameters of microbial transport in the soils; however, the existing data on possibility of their migration in frozen soils and rocks is either contradictory or absent. The study was carried out on the example cells of Bacillus cereus strain F. The experiments were conducted in deep-freeze at a fixed negative temperature throughout one year. The question on the possibility of microorganism cells migration in permafrost is relevant from the perspective of the paramount global life preservation issues, stratigraphy of the various permafrost arrays, as well as their dynamics in the conditions of climate warming and emergence of risks of bringing microflora with the unknown properties to the modern ecosystems. Throughout the observation period, there was detected no evidence of migration of the model bacterial cells in frozen soils. The author established that the pattern of change in the number of colony-forming cells of the model organism in inoculated part of the samples of frozen soils is greatly affected by the level of their dispersion and aggregation.
unfrozen water, particle size, sand, clay, microorganisms, permafrost, frozen soil, metabolic activity, colony-forming unit, migration
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