Fig. 4.

Combined effects of different diets and oxygen concentrations on the steady-state abundances of the three species. Bulk carbohydrate and amino acid concentrations were varied according to the diet and the bulk oxygen concentration was set to a fixed value between 0 and 5x10 ⁻³ mM. a Anaerobic species abundances averaged across the biofilm. b Spatial profiles of the steady-state oxygen concentration. c Total biomass produced by the three species averaged across the biofilm. d–f Species abundances relative to anaerobic values averaged across the biofilm