Fig. 6

Combined PCA ordination (A) and mean relative abundance plot depicting the top ten most abundant taxa in coral and top ten most abundant taxa in water samples at time 0 (B) and time 96 (C). Beta diversity was calculated based on Euclidean distances of robust centered log-ration transformed data. Ellipses represent 95% confidence intervals. In panel B, each bar represents the average of six samples for water, and 119 samples for coral. In panel C, each water sample bar represents the average of three samples for experimental treatments and five samples for control. Each coral sample bar represents the average of 19 samples for control, 12 samples for ‘ampicillin low’, ‘ampicillin high’, ‘ciprofloxacin low’, ‘mixture low’, and ‘streptomycin high’, 11 samples for ‘ciprofloxacin high’ and ‘streptomycin low’, and 9 samples for ‘mixture high’