Fig. 2: Comparisons among microbial communities of field-sourced apparently healthy (AH) coral colonies across stony coral tissue loss disease (SCTLD) zones (vulnerable, endemic, and epidemic).

A beta-diversity (centered log-ratio transformed and plotted with a Euclidean distance), and differential abundance analysis in (B) vulnerable vs endemic zones, and C vulnerable vs epidemic zones. ASVs are grouped by genus (represented by dashes) on the y axis and then by order, and only ASVs with a Padj < 0.001, a W statistic >90, and a log-fold change < −2 and >2 were visualized. AH samples from the three coral compartments (mucus, tissue slurry, and tissue slurry skeleton) were included and Acropora spp. samples were excluded from the analysis. The ellipses in (A) represent the center of the Euclidean distance from the respective zone with a 95% confidence of the ellipses.