Fig. 7

a Stand-level changes in tree and soil organic layer carbon stocks with time since fire for high- and low-severity soil burns. Site index at 50 years is also shown (low- and high-severity soil burns combined). Effect of B) mean fire return interval and C) proportion of stands originating from high vs. low-severity soil burns on carbon stocks. In b, proportion of high-severity soil burns was set to 0.5 and in c, mean fire return interval was set to 100 years. In b and c, stand age distribution is assumed to be at equilibrium with the fire regime and to follow a negative exponential distribution. Data in A) modified from Lecomte et al. (2006b) and Simard et al. (2007)