Fig. 3: Ecological diversification in large communities.
From: Predicting the first steps of evolution in randomly assembled communities
a Schematic showing the subset of mutations that are able to stably coexist with their parent strain. Coexistence occurs in the yellow region where the invasion fitness is below a critical threshold scoex, which depends on the abundance of the parent and the phenotypic effect size of the mutation. b–d Probability that a successful knock-out mutant coexists with its parent strain as a function of (b) the niche saturation \({{{{\mathcal{S}}}}}{*}/{{{\mathcal{R}}}}\), (c) the typical number of resources used per species \({{{{\mathcal{R}}}}}_{0}\), and (d) the change in overall uptake budget of the mutant ΔX. Inset shows the dependence on the total invasion fitness sinv. In all panels, curves show the theory predictions from Supplementary Notes 3.3 and 3.4, while points show means and standard errors over 104 simulation runs with base parameters \({{{\mathcal{R}}}}=200\), \({{{{\mathcal{R}}}}}_{0}=40\), \({{{{\mathcal{S}}}}}{*}/{{{\mathcal{S}}}}=0.1\), and uniform resource supply.
