Summary of the key environmental variables and split values identified for which the abundance of each OTU were highest and lowest.

Percentage cover of turf algae (Turf), not living substrates (Abiotic), and hard coral (HC), and the five-year average of the remote sensing variables sea surface temperature (SST), and photosynthetic active radiation (PAR) were the key environmental variables determining split values of the dominant OTU abundance.