Effect of tree species on methane and ammonium oxidation capacity in forest soils [An article from: Soil Biology and Biochemistry]

This digital document is a journal article from Soil Biology and Biochemistry, published by Elsevier in 2005. The article is delivered in HTML format and is available in your Amazon.com Media Library immediately after purchase. You can view it with any web browser.

Description:
High and low affinity methane oxidation potentials were measured for soils under five fully replicated land-use treatments over an entire calendar year. Simultaneous measurements of soil nitrification potential in replicate soil samples were also made. Both high and low affinity CH"4 oxidation were significantly reduced in the nitrate-rich soils under alder, compared to the other four vegetation treatments (oak, Norway spruce, Scots pine and grass). However, the effect of land-use was less for high affinity methanotrophy than for low affinity CH"4 oxidation. Nitrification rates were highest in alder soils, with the greatest potential for NH"4^+ oxidation occurring in the top 5cm of the soil. No significant relationship between potential nitrification rate and low affinity CH"4 oxidation was seen. However, a significant negative relationship between nitrification and high affinity CH"4 oxidation was identified. We found vegetation type to be a key determinant of soil-mediated CH"4 and NH"4^+ oxidation, but found no evidence for significant CH"4 oxidation by nitrifying bacteria.