Figure 8.

Amount that the cheater was limited because the resources were separated. We calculated the cheater's average reproductive rate (B_0x, averaged across all sites) for each community in figure 2. We divided this value by what the average would have been if under well-mixed conditions (i.e. d_res → ∞). Lower values indicate that the cheater was highly limited because each resource was found in different areas, and higher values indicated that both resources tended to have similar values. The cross-feeders have a birth rate disadvantage of b₂/b₀ ≈ 0.88; therefore, if the cheater and cross-feeders are coexisting, we expect the cheater's reproductive rate to be reduced by about 12% (less if spatial structure is important, figure 7).