Fig. 5: Structural equation model (SEM) examining the multivariate effects on the temperature sensitivity of forest soil microbial CH4 oxidation.
From: Higher temperature sensitivity of forest soil methane oxidation in colder climates
Results of the final model fitting: R2 = 0.49, P = 0.221, Fisher’s C = 10.667. The blue and red lines indicate positive and negative relationships, respectively; gray lines indicate insignificant relationships (P > 0.05). The thickness of the lines represents the magnitude of the path coefficient, with thicker lines indicating larger coefficients. The numbers adjacent to the arrows are standardized path coefficients. The model includes the following variables: mean annual temperature (MAT), mean annual precipitation (MAP), annual maximum temperature (Tmax), annual temperature variation (T_V), total carbon content (TC), total nitrogen content (TN), ammonium nitrogen content (NH4+), soil pH (pH), clay content (Clay), relative abundance of Verrucomicrobia (Verrucomicrobia), relative abundance of type II methanotrophs (Type II methanotrophs). 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).
