FLUXES AND CONTROLS OF CO2, CH4 AND N2O IN A MARSH WETLAND OF XIAOXING’AN MOUNTAINS, NORTHEASTERN CHINA Gap characteristics in the mixed broad-leaved Korean pine forest in Xiaoxing’an Mountains Seasonal dynamics of soil microbial biomass in six forest types in Xiaoxing’an Mountains, China Seasonal dynamics of leaf area index using different methods in the Korean pine plantation Effects of wetland draining for forestation on methane emissions in Xiaoxing’an Mountains, Northeast China