Fig. 3
From: Microbial indicators of environmental perturbations in coral reef ecosystems
Coral reef microbiome sensitivity to environmental parameters. Bray-Curtis distance-based RDA (dbRDA) was used to evaluate the effect of environmental fluctuations on the microbial community composition of various coral reef habitats/hosts. The total variance (in percent) explained by each axis is indicated in parentheses. a Environmental factors (average temperature, daylight, TSS, NPOC, Chl a and POC) significantly explained the observed compositional variation in the seawater-associated microbial community (permutational ANOVA for dbRDA). b Variation partitioning shows that environmental parameters (average temperature, daylight, TSS, NPOC, Chl a and POC) rather than season and/or sampling date explain observed community composition structures in the seawater microbiome. c Coral mucus and algae biofilm as well as d coral and sponge tissue microbial communities were significantly influenced by environmental factors; however, environmental parameters only explain on average 11% of the observed community variation (Additional file 1: Table S7)