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A Mixture of “Cheats” and “Co-Operators” Can Enable Maximal Group Benefit

Figure 3

The role of the rate-efficiency trade-off and the dynamics of sugar metabolism.

(a) Expected final population size (Log(titre)) after exhaustion of resources as a function of initial producer frequency in the absence of rate-efficiency trade-off. The temporal glucose spike, with glucose measured in mM/agar and time represented in hours, (b) when initially all the population are producers and (c) when 80% are producers with glucose measured in mM/agar and time is in hours. Note that the spike in (c) is lower and longer-lived, hence glucose is used more efficiently. (d) Efficiency of hexose usage by producers (g protein/mM hexose) when non-producers are present (80∶20 ratio: left hand panel) and when they are absent, i.e. 100% producers (right hand panel). Here we average across spatial structures.

Figure 3

doi: https://doi.org/10.1371/journal.pbio.1000486.g003