Fig. 3.

Observed versus predicted OTU percent abundance in mixed-resource phycosphere communities. Dotted line and shading, linear regression and 95% CI of observed versus predicted based on a WS null model; solid line, 1:1 relationship between observed and predicted. (Left) Data from media A1 and B1 (five metabolite mixtures); only OTUs accounting for ≥ 1% of the community are shown for simplicity. (Right) Data from media A2 through A6 and B2 through B6 (four metabolite mixtures); only OTU0001 is plotted for simplicity (see SI Appendix, Fig. S5 for complete plots). Red stars indicate significant overrepresentation of OTUs in the mixed-resource communities. Error bars indicate ±1 SE.