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shift from acetoclastic to H2-dependent methanogenesis in a west Siberian peat bog at low pH values and isolation of an acidophilic Methanobacterium strain.Kotsyurbenko, O R; Friedrich, M W; Simankova, M V; Nozhevnikova, A N; Golyshin, P N; Timmis, K N; Conrad, R; Institut für Mikrobiologie, Carolo-Wilhelmina Technische Universität zu Braunschweig, Biozentrum, Braunschweig, Germany. firstname.lastname@example.org (2007-04)Methane production and archaeal community composition were studied in samples from an acidic peat bog incubated at different temperatures and pH values. H(2)-dependent methanogenesis increased strongly at the lowest pH, 3.8, and Methanobacteriaceae became important except for Methanomicrobiaceae and Methanosarcinaceae. An acidophilic and psychrotolerant Methanobacterium sp. was isolated using H(2)-plus-CO(2)-supplemented medium at pH 4.5.