Peatlands, more commonly referred to as bogs and fens, are common boreal freshwater wetlands. Other names for peatlands are moors and mires. Peatlands are dominated by partially decayed vegetation, particularly mosses. The slow decay rate of the vegetation is due to the low oxygen conditions in the wetland environment. Peatlands have organic soil rather than mineral soil which is dominant in most other wetland types. Bogs are acid peat dominated wetlands that have minimal surface or groundwater flows into or out of the wetland. Fens are also acidic peatlands but have more inflow and outflow of surface or groundwater.