Abstract:Wetland ecosystems are under water-rich hydrographical environment and generally accumulate in an abundant amount of organic carbon (C) in their sediment layers. For better understanding the mechanisms in the accumulation of organic C in wetlands, the interactions between water condition and the mineralization of organic C were studied using the sediments of marshy meadow and fen from North China. The sediments were adjusted into 5 gradient of water contents: 24%~146%WHC for the marshy meadow, and 16%~104%W...