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. 2013 Jun 18;110(27):E2460–E2469. doi: 10.1073/pnas.1220014110

Fig. 4.

Fig. 4.

Semilog (number of species) vs. time for unbounded (red) and constrained (blue) growth. During stage 1 (Inline graphic), both constrained and unconstrained systems increase exponentially. During stage 3 (Inline graphic), the system is no longer growing (Inline graphic). After a period, the system will attain SEO steady state during both stages. Only during the transitional stage 2 will the system deviate significantly from the predictions of the SEO model.