Fig. 4 Relative growth rates of osmotrophs depend on resource availability and substrate recalcitrance. Each panel indicates relative performance of each category of organism as the C:N:P ratio and recalcitrance, τ , are varied over a wide but physiologically relevant range, shown on log scales. Results are shown after the fastest-growing colony has increased in size by a factor of 1000, and the colour in each pixel is proportional to the increase in size of a colony of fungi (magenta), motile cells (cyan), and autolytic cells (yellow), according to the inset triangle. Rows correspond to the increasing amount of resource availability as κ is varied from 2, 4 to 6 cell radii (see Fig. 2). Columns correspond to varying N:P ratios set to 5:1, 20:1, and 40:1. The substrate has a dry mass of 0.5 g ml − 1 in all