Now examine the lower panel (butterflies), where the curve continues to rise linearly. what does this indicate about the processes structuring the butterfly community?

a. it suggests that the communities are unsaturated and that the size of the regional pool determines local species richness.
b. it suggests that the communities are becoming saturated and that local processes are likely becoming increasingly important.
c. it does not tell us anything about the relative importance of the regional species pool and local interactions.