Fig. 3: Relative importance of biotic and abiotic variables in determining the temperature sensitivity of forest soil microbial CH4 oxidation.
From: Higher temperature sensitivity of forest soil methane oxidation in colder climates
a Variance decomposition analysis evaluating the proportion of variation in the temperature sensitivity of forest soil microbial CH4 oxidation explained by all variables. b Results from random forest analysis displaying the relative importance of the individual variable in predicting the temperature sensitivity of forest soil microbial CH4 oxidation. The climate factors include mean annual temperature (MAT), mean annual precipitation (MAP), annual maximum temperature (Tmax), annual temperature variation (T_V). The soil resources include total carbon content (TC), total nitrogen content (TN), ammonium nitrogen content (NH4+), nitrate nitrogen content (NO3−), soil C:N ratio (C:N). The soil properties include soil pH (pH) and clay content (Clay). The bacterial community composition includes relative abundances of Proteobacteria, Acidobacteriota, and Verrucomicrobia. The methanotroph traits include methanotroph richness, pmoA gene copy number, relative abundance of type I methanotrophs (Type I), relative abundance of type II methanotrophs (Type II), the ratio of type II to type I methanotrophs (Type II: Type I). The temperature sensitivity of forest soil microbial CH4 oxidation was quantified using the partial derivative of the soil microbial CH4 oxidation rate with respect to temperature (parameter a values, see “Methods”).
