Appendix S1 associated R code

Simulations described in Appendix S1 to explore properties of the variance in relative fitness among maternal lines sourced from region "r" (<b>equation 3 in main text</b>), under the null model for opportunity for selection, based on demographic stochasticity; and simulations described in Appendix S1 to explore properties of the distribution of the mean survival rate of individual plants across maternal lines sourced from a given region "r" (<b>equation 1 in main text</b>), under the null model for provenance selection, based on demographic stochasticity.