Fig. 3: Contribution and influence of explanatory variables on determining soil pyrogenic carbon (PyC) stock accumulation across tropical savannas in Kruger National Park, South Africa.
From: Pyrogenic carbon contribution to tropical savanna soil carbon storage
A The variables are ranked based on their relative importance, where an increase in mean square error reflects the change in the random forest model when each variable is omitted. Partial dependence plots (PDPs) show the predicted soil PyC stock (Mg C/ha) as a function of each predictor variable, including soil clay and silt content (%) (B), mean annual rainfall (mm) (C), woody cover (%) (D), grass biomass (kg/ha) (E), elevation (m) (F), fire frequency (fires/year) (G), years since the last fire (years) (H), and slope (degrees) (I). Source data are provided as a Source Data file.
