Figure 4.

The robustness of the prevalence regime is mainly determined by the position of the prevalent environment. (a) Circles show prevalent seasons, for which the violation of the prevalence regime occurred already when the fraction of time t spend in the second, randomly chosen environment is small, t < 0.1. These non-robust seasons either promote unicellularity or are located at the borders between areas of optimality—where at least two life cycles have similar growth rate. (b) Circles show prevalent seasons, for which the violation of the prevalence regime occurred only when the fraction of time spend in the other environment, is very large, t > 10. The distribution of these seasons has a low density in the border regions. (Online version in colour.)