FIG 6.

Antibiotic resistance testing does not consistently predict species presence/absence in a community context. For each species-drug combination, we assessed predicted survival (MIC in rich medium [Table S2] > experimental concentration) and observed survival (relative abundance of at least 1% averaged across all five replicates at the final time point [Fig. 4]). True-positive cases (predicted and observed present) are coded in gray; true negatives (predicted and observed absent) are in white. False positives (predicted present, observed absent; evidence for competition) are in red, and false negatives (predicted absent, observed present; evidence for facilitation) are in blue. Species order was determined through clustering via stringdist (118). In Discussion we address the caveat that single-species MIC measures are taken under distinct growth conditions.