Figure 4From: The impact of natural transformation on adaptation in spatially structured bacterial populationsThe frequency of bacteria of genotype 1 across the equator section of a 21 × 21 grid, for non-transforming (solid curves) and transforming (dashed curves) populations growing under different density dependent selection regimes: A) s e = 0.01 , s f = 0.01 , B) s e = 0.01 , s f = 0 and C) s e = - 0.01 , s f = 0.01 . The curves show the frequencies of allele 1 at time points: A) T = 1000, B) T = 1250 and C) T = 5000. (As the speed of adaptation is different in the different selection regimes, different time points have been used to informatively represent the dynamics in each regime.) Simulations start from a bacterium of type 0 at the center of the space. Interpolation was used to obtain a continuous distribution curve from discrete data points. Other parameters take the values r = 0.1, K = 100, m = 10- 2, u = 10- 3, μ = 10- 6, g = 10- 1, c = 0.Back to article page