Figure 2

Surviving species as a function of extinction events. Fraction of surviving species (a,c) and surviving plant species (b,d) resulting from pollinator extinctions under the random scenario in SB (above) and PM (below) communities. Model F simulates extinctions considering the variation in both IPD (plant dependence on pollinators; see methods) and interaction strength. In model D, all plants have an IPD = 1, i.e., depend entirely on animal pollination to set seeds. Model H simulates the case in which there is no heterogeneity in interaction strength. Finally, in model DH all plants have an IPD = 1 and there is homogeneity in interaction strength. Differences between models that do not consider the real dependence of plants on pollinators (F vs. D, H vs. DH) are higher than between models that neglect interaction strength heterogeneity (F vs. H, D vs. DH). Note that the curves of the fraction of surviving species and plant species are on top of each other for Models F and H (maintaining the empirical IPD), and are also for Models H and DH (when plants depend entirely on pollinators). 95% confidence intervals are of size of the line width and are not shown for clarity.