/ Degraded


Human population

20 40 60 80 100 Time (years)

1 10 100 1000 Time under agriculture (long years)

Figure 13.4 (a) Temporal change of land use based on a simple SIR forest fire model of land-use change. (b) Equilibrium proportions of land remaining as undisturbed forest (black dots) and as agricultural land (lines). The land retained under agriculture is depicted for four different rates of recovery of abandoned land: 5 years (solid line); and 10, 25, and 100 years (highest to lowest dashed lines). From Dobson et al. (1997a).

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