marginally significantP = 0.085
Elevated CO 2 alone significantly ( P < 0.05) increased the signal intensities of mcrA for CH 4 production and pmoA for CH 4 oxidation, while the signal intensities of these two genes decreased under warming at marginally significant ( P = 0.085) or significant ( P = 0.033) levels, respectively ( Supplementary Figure S5 ).