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. 2017 Dec 20;12(12):e0186119. doi: 10.1371/journal.pone.0186119

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© 2017 Schuster et al

This is an open access article distributed under the terms of the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited.

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Fig 1 — Species are indicated in bold and rates are indicated in italics. X₁, cooperator; X₂, cheater; S, nutrient substrate; S⁰, unprocessed nutrient substrate in inflow; P, processed nutrient; E, enzyme; D(t), dilution rate, 1/yF(P), per capita nutrient consumption rate; F(P), growth rate; q and 1 − q, proportions of nutrient allocated towards growth and enzyme production, respectively.