Community-level effects of acoustic enrichment. a Total abundance, b species richness, and c effective Shannon diversity of juvenile fish communities on experimental patch reefs. Boxplots represent medians (central lines), interquartile ranges (boxes) and 95% ranges (whiskers). Linear mixed models revealed significant effects of loudspeaker treatment in all three cases; different letters above boxplots represent significant differences in post-hoc Tukey’s HSD tests (Supplementary Table 1). Absolute values for species richness and Shannon diversity are likely to be underestimates, as fish that were only identified to higher taxonomic levels (family or subfamily) may represent more than a single species.