Formation, collective motion, and merging of macroscopic bacterial aggregates
Fig 3
(A) Snapshots of a subregion of the plate at T = 14.5 h and T = 37.3 h. The aggregates are depicted along with the trajectory identified by the tracking algorithm. (B) Distribution of the average speed of all aggregates (n = 495). (C) Distribution of path deflection, quantified as the ratio of distance to displacement (n = 495). The path taken by the aggregates slightly deviates from a straight line. D) Log-log plot of mean square displacement versus time. The fit yields a coefficient of 1.54 indicating that the trajectories are, on average, superdiffusive. Brownian motion, corresponding to diffusion, yields a coefficient of 1.0.