biostudies-literatureJensen SNorges Forskningsråd206-215https://www.ebi.ac.uk/biostudies/studies/S-EPMC10464705biostudies-literatureUnknown15(3)Methane uptake and diversity of methanotrophic bacteria was investigated across six hydrologically connected wetlands in a mountainous forest landscape upstream of lake Langtjern, southern Norway. From floodplain through shrubs, forest and sedges to a Sphagnum covered site, growing season CH₄ production was insufficiently consumed to balance release into the atmosphere. Emission increased by soil moisture ranging 0.6-6.8 mg CH₄ m^-2  h^-1 . Top soils of all sites consumed CH₄ including at the lowest 78 ppmv CH₄ supplied, thus potentially oxidizing 17-51 nmol CH₄ g^-1 dw h^-1 , with highest V_max 440 nmol g^-1 dw h^-1 under Sphagnum and lowest K_m 559 nM undEnvironmental microbiology reportsActivity and abundance of methanotrophic bacteria in a northern mountainous gradient of wetlands.PMC10464705165139/S30/sibJensen SSiljanen HMPDorsch PfalseActivity and abundance of methanotrophic bacteria in a northern mountainous gradient of wetlands.Methane uptake and diversity of methanotrophic bacteria was investigated across six hydrologically connected wetlands in a mountainous forest landscape upstream of lake Langtjern, southern Norway. From floodplain through shrubs, forest and sedges to a Sphagnum covered site, growing season CH₄ production was insufficiently consumed to balance release into the atmosphere. Emission increased by soil moisture ranging 0.6-6.8 mg CH₄ m^-2  h^-1 . Top soils of all sites consumed CH₄ including at the lowest 78 ppmv CH₄ supplied, thus potentially oxidizing 17-51 nmol CH₄ g^-1 dw h^-1 , with highest V_max 440 nmol g^-1 dw h^-1 under Sphagnum and lowest K_m 559 nM und2023-01-01T00:00:00Z2023 Jun2025-04-04T19:24:40.821Z2025-04-04T19:24:40.821ZS-EPMC104647053678605810.1111/1758-2229.13137