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Figure 1 | BMC Evolutionary Biology

Figure 1

From: Environmental adversity and uncertainty favour cooperation

Figure 1

The minimal acceptable level of resources. The incremental fitness cost (assumed to be straight lines for simplicity) and benefit (curved line) are shown as a function of the resource amount gained, in a less adverse (continuous straight line) and a more adverse (segmented straight line) environment (the slope of the two lines is the same). Cost increases with resource amount since, optimally, more investment (cost) is made when the return (benefit) is greater. The resource amounts Rm 1and Rm 2are assumed to be the minimal acceptable levels of resources in the two environments.

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