Труды сотрудников ИЛ им. В.Н. Сукачева СО РАН

/ I. D. Grodnitskaya [et al.] // Microbiology. - 2018. - Vol. 87, Is. 1. - P89-102, DOI 10.1134/S0026261718010083 . - ISSN 0026-2617
Аннотация: The structure and functional activity of microbial complexes of a forest oligo-mesotrophic subshrub- grass-moss bog (OMB, Central Evenkiya) and a subshrub-sedge bog in the polygonal tundra (PB, Lena River Delta Samoylovsky Island) was studied. Soil of the forest bog (OMB) differed from that of the polygonal tundra bog (PB) in higher productivity (Corg, Ntotal, P, and K reserves), higher biomass of aerobic chemoorganotrophs (2.0 to 2.6 times), and twice the level of available organic matter. The contribution of microorganisms to the carbon pool was different, with the share of Cmic in Corg 1.4 to 2.5 times higher in PB compared to OMB. Qualitative composition of the methane cycle microorganisms in PB and OMB soils differed significantly. Methanogenic archaea (Euryarchaeota) in the shrub-sedge PB of tundra were more numerous and diverse than in the oligo-mesotrophic bog (OMB) and belonged to six families (Methanomassiliicoccaceae, Methanoregulaceae, Methanobacteriaceae, Methanomicrobiaceaee, Methanosarcinaceae, and Methanotrichaceae), while members of only four families (Methanosarcinacea, Methanobacteriaceae, Methanotrichaceae, and Methanomassiliicoccaceae) were revealed in OMB. In both bogs, methane-oxidizing bacteria belonged to Alphaproteobacteria (II) and Gammaproteobacteria (I). Methanotroph diversity was higher in OMB than in PB. Microbial communities of PB soils had higher potential activity of methanogenesis and methanotrophy compared to those of OMB. Methanogenic and methanotrophic activities in PB were 20 and 2.3 times higher, respectively, than in OMB. © 2018, Pleiades Publishing, Ltd.

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Держатели документа:
Sukachev Institute of Forest, Siberian Branch, Russian Academy of Sciences, Krasnoyarsk, Russian Federation
Institute of Biophysics, Siberian Branch, Russian Academy of Sciences, Krasnoyarsk, Russian Federation
Information and Methodical Center for Expertise, Accounting, and Analysis of Rotation of Medical Agents, Kranoyarsk, Russian Federation
Roche Diagnostika Rus, Moscow, Russian Federation

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Grodnitskaya, I. D.; Trusova, M. Y.; Syrtsov, S. N.; Koroban, N. V.

/ S. Evgrafova [et al.] // International Multidisciplinary Scientific GeoConference Surveying Geology and Mining Ecology Management, SGEM : International Multidisciplinary Scientific Geoconference, 2019. - Vol. 19: 19th International Multidisciplinary Scientific Geoconference, SGEM 2019 (30 June 2019 through 6 July 2019, ) Conference code: 150487, Is. 3.2. - P293-300, DOI 10.5593/sgem2019/3.2/S13.039 . -
Аннотация: Methanotrophic bacteria are unique group of microorganisms structurally and functionally adapted to use methane as a source of carbon, which is of great interest due to their ability to oxidize atmospheric methane. Methanotrophs are known to associate with mosses, which provide bacteria by habitat and protection. Methanotrophic bacteria provide mosses with carbon dioxide resulting of methane oxidation, whose content in moss tissues can reach 32%. We studied mosses and lichens sampled in Eastern Siberia permafrost ecosystems for methane oxidizing ability of associated bacteria, at concentrations of methane close to atmospheric. The consumption of methane in consortia of mosses and lichens and associated microorganisms was measured in laboratory incubation experiments. The methanotrophic activity registrated using gas analyzer Picarro 2201-i (Picarro Inc., USA) as a shift in the isotopic composition ?13C in methane. It was shown that samples collected in permafrost soils have a larger ability to methanotrophy than sample collected in non-permafrost soils. In addition, we measured methanotrophic ability of the individual species of mosses and lichens. It has been shown that methanotrophs associated with lichens Cladonia stelaris and Cetraria laevigata have great methanotrophic ability on a level of methanotrophs associated with mosses Rhytidium rugosum and Dicranum polysetum. © SGEM2019 All Rights Reserved.

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Держатели документа:
V.N. Sukachev Institute of Forest, FRC KSC SB RAS, Krasnoyarsk, Russian Federation
Siberian Federal University, Krasnoyarsk, Russian Federation

Доп.точки доступа:
Evgrafova, S.; Kadutskiy, V.; Mukhortova, L.; Prudnikova, S.