Sequential Reduction of Other Inorganic Electron Acceptors

2 Sequential Reduction of Other Inorganic Electron Acceptors 

Once the oxygen is depleted in the soil, selected aerobic bacteria assumes a facultative role and functions like anaerobic bacteria. During this process, these bacteria use other electron acceptors 

Inorganic Redox System in Flooded Soils and Sediments 

Reduction System Oxidized Form Properties Reduced Form Properties 

Time after flooding or soil depth ilfll % 

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Methanogens require neutral pH conditions to function optimally. Methane prodnction occnrs only after a sequential reduction of other inorganic electron acceptors (e.g., Fe +, Mn +, SO ) it is produced at redox levels below which sulfate in soil is rednced. Methane prodnction is inversely related to sulfate concentration in wetland soils and sediments. High snlfate levels snch as those found in seawater can inhibit methane formation (DeLaune et al., 1983). 

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