Fig 7. Susceptibility to distraction under fitness fluctuations.
Distributions of the frequency of T clones are obtained from numerical integration of the 2-species model (Eq 5) with demographic noise and uncorrelated fitness noise (ϵ = 0). Distributions start from a Gaussian with mean x0 = 0.5 and width 0.05. Absorbing boundaries are applied and results shown at different times, t = 0 (blue), 1 (orange), 5 (green), 10 (red), and 20 (purple). A to C: σT = 0.5, 1, 2, corresponding to v(x0)>0, = 0, <0, respectively. Stronger fitness fluctuations increase the likelihood of extinction for T clones and accelerate relaxation. Coexistence (B) requires an exact balance of fitness bias and variations. Other parameters include s = 0.5, σD = 0 and K = 100.