Brigitte Tenhumberg, Andrew J. Tyre, Anthony R. Pople, and Hugh P. Possingham. 2004. Do harvest refuges buffer Kangaroos against evolutionary responses to selective harvesting? Ecology 85:2003–2017.

We model the increasing influence of "drought resistance" alleles with decreasing rainfall by changing the variance as a function of rainfall (R),

(C.1)

where m is the maximum variance and d is a parameter influencing how quickly the variance increases with decreasing rainfall (Fig. C1).

FIG. C1. Survival probability of males as a function of the frequency of drought resistance genes. The uppermost curve illustrates the survival of individuals with the maximum number of drought resistance alleles, and the lowest curve the survival of individuals with zero drought resistance alleles.