Abstract
Methane oxidation capacity of soil from an experimentalsite in Northwest England was strongly dependent on temperatureand percentage water holding capacity. The soil had a distincttemperature optimum of 25 °C, with capacity for net methaneoxidation being completely lost below 5 and greater than37 °C. Optimum percentage water holding capacity for methaneoxidation was in the range 30–60%, with significant reductions inmethane oxidation rates in soils outside this range. Organic andmineral layers within the soil showed differences in potentialmethane oxidation rate, with methane oxidation being most rapid inthe buried organic layer and least rapid in the surface organiclayer. The importance of soil structure and gas diffusionlimitation is underlined, as is the strong temperature dependenceof methane oxidation when such diffusion limitation is removed.
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