FIGURE 4.

(a) Effects of productivity and diversity of preexisting resources on the final diversity of the clade when (a) a consumer cannot evolve (θ _c = −10), and when (b) it can evolve (θ _c = 0). (c) Difference in the final diversity of the clade between the two scenarios (i.e. number of ecomorphs when a consumer can evolve—number of ecomorphs when a consumer cannot evolve). In the top left black region, the ancestral population cannot persist. In the hatched region (in panel b), intraclade consumers evolve. Notice that the minimum number of preexisting resources in the vertical axis is 2. Parameter values as in Table S1