Seasonal Variation of Emission Fluxes of CO2,N2O and CH4 from Larix gemlinii Swamps Soils in Xiaoxing’An Mountains of China Emissions of CO2, CH4 and N2O from broad-leaned forested swamp soils in Xiaoxingan Mountains Soil respiration rate and its seasonal variation of island forested swamp in cool temperate zone METHANE EMISSION FROM FORESTED SWAMPS IN XIAOXING’AN MOUNTAINS, NORTHEASTERN CHINA Effects of fire disturbance on litter mass and soil carbon storage of Betula platyphylla and Larix gmelinii-Carex schmidtii swamps in the Xiaoxing‘an Mountains of Northeast China