Yield of A) <i>Serratia marcescens</i> B) <i>Novosphingobium capsulatum</i>.

<p>Yield is measured as optical density, and corresponds to the total maximum biomass measured during a weeklong fitness assay. The bars show the estimated marginal mean yield based on the GLMM + SE in all treatments. Treatments are the same as in <a href="http://www.plosone.org/article/info:doi/10.1371/journal.pone.0076471#pone-0076471-g001" target="_blank">Figure 1</a>.