Fig. 5From: Emergence of microbial diversity due to cross-feeding interactions in a spatial model of gut microbial metabolismOutcome of the evolutionary simulations. a population average and standard deviation of the number of enzymatic reactions (“genome size”) over time. b Population average and standard deviation of the cross-feeding factor C n as a function of the position in the colon. The averages and standard deviation are over the vertical dimension and are calculated over the final part of the simulation, from 3500 h until 4000 h. For the graphs of the other simulations, see Additional file 3: Figure S3Back to article page