Assemblages of disease and other compromised health signs
differed significantly between use-level (pseudo-F1,8 = 3.63,
P = 0.008), with the prevalence of visually healthy corals contributing most strongly to driving this separation (39.5% of variation
on the PCO1 axis: Fig. 2 and Table S1). The mean prevalence
of healthy corals recorded at high use sites was 45.2% ± 6.2 SE
(range = 31–63%, n = 5983 corals surveyed), approximately half
the mean percentage of healthy corals recorded at low use sites
(78.8% ± 2.5 SE, range = 71–84%, n = 4516 corals surveyed).