Water table control of CH4 emission enhancement by vascular plants in boreal peatlands

摘要: Removal of the vascular vegetation (Eriophorum vaginatum) at two sites in a Swedish boreal peatland decreased seasonal CH 4 flux by 55 to 85%, while daily Canadian with Carex rostrata removed over 30%. Dissolved pore water concentrations rooting zone were 1.2 2.5 times greater than storage similar where was clipping, suggesting that removal production. Moreover, nighttime enhancement coincident diurnal peak dissolved concentration. A positive correlation between mean net ecosystem production and (r 2 = 0.655, n 8) lawn sedge suggests CO fixation had higher flux, likely through enhanced methanogenesis transport. The degree enhancement, however, changed throughout growing season correlated position table. Under low table conditions presence plant cover has lesser effect enhancing emissions, indicating exchange coupling is limited plants only remain wet near surface.