Аннотация:Field measurements of methane and carbon dioxide flux were carried out using portable static chambers in south (ST) and middle taiga (MT) subzones of Western Siberia (WS) from 16 to 24 August 2015. Two sites were investigated: Bakchar bog in Tomsk region (in typical ecosystems for this area: oligotrophic bog/forest border and waterlogged forest) and Shapsha in Khanty-Mansiysk region (in waterlogged forest). Highest values of methane fluxes (mgC·m-2·h-1) were obtained in burnt wet birch forest (median 6.96; first quartile 3.12; third quartile 8.95). Lowest values of methane fluxes (among sites mentioned above) were obtained in seasonally waterlogged forests (median -0.08; first and third quartiles are -0.14 and -0.03 (mgC·m-2·h-1), correspondingly). These data will help to estimate regional methane flux from waterlogged and periodically flooded forests and to improve its prediction.