title: Microbiological oxidation of methane in freshwater lakes of the Mari ASSR.
abstract: The quantity of methane-oxidizing microorganisms and intensity of microbiological methane oxidation in lakes of the Mari ASSR were studied. Maximum numbers of bacteria and highest intensity of methane oxidation were observed during summer stagnation in the thermocline, at the interface of aerobic and anaerobic zones. The intensity of oxidation was 4.6--28.1 x 10(-10) cm3 of methane per day per viable cell. During winter stagnation, the intensity of methane oxidation per cell was an order of magnitude lower. Over 69% of oxidized methane carbon was detected in extracellular metabolites, primarily CO2.
mesh_terms: D001419:Bacteria / Q000378:metabolism*; D005618:Fresh Water; D008697:Methane / Q000378:metabolism*; D010084:Oxidation-Reduction; D012621:Seasons; D013696:Temperature; D014586:USSR; D014871:Water Microbiology
chemical_list: D008697:Methane