Fig. 1: Water availability modifies the effect of fire on SOC.
From: Soil carbon storage capacity of drylands under altered fire regimes
Environmental conditions influenced the percent difference in SOC concentrations in the burned versus unburned plots (lower values thus signify a fire-driven loss). a, Fire effects as a function of aridity (precipitation/potential evapotranspiration), with a lower aridity index (AI) indicating dry conditions (Methods). b, Response ratios calculated within aridity classes as defined by the UNEP World Atlas of Desertification (Methods) (Supplementary Information). SA: arid and semi-arid: 0 < AI ≤ 0.5; DSH: dry sub-humid: 0.5 < AI ≤ 0.65; H: humid: 0.65 < AI ≤ 0.75; HH: hyper-humid: AI > 0.75. The colours indicate different aridity classes. c, Fire effects as a function of precipitation seasonality, which is the coefficient of variation of monthly precipitation within a year multiplied by 100. All dashed lines indicate 95% confidence intervals of the model fit. Importance of all variables in the model selection are presented in Supplementary Table 2. a and c illustrate results from meta-regression of the top model with all other variables set to their medians. Extended Data Figs. 2 and 3 contrast other variables in the model selection and fire frequency effects.
