Figure 4

Median and quartiles of stochastic population growth rates obtained from 100 simulations of 14 annual transitions in Helianthemum squamatum and Lepidium subulatum. Upper panels consider parameters specified in Supplementary Table S9 for simulations 1–4 (left) and 5–8 (right); mid panels consider parameters for simulations 9–12 (left) and 13–16 (right); lower panels correspond to simulations 17–20 (left) and 21–24 (right). Numbers in the upper-right corner indicate the year from which climatic conditions (specified in each panel) were more frequently used. Open symbols represent simulations where the interaction between H. squamatum and L. subulatum was null, whereas filled symbols represent simulations where the interaction was considered. Stable population growth rate (λ = 1) is marked with a dashed horizontal line in all plots. The letters A and B in the X axis indicate blocks. See Supplementary Table S10 for exact values of climatic variables.