Despite the low resolution of taxonomic levels achieved with FISH probes targeting only large phylotype groups, significant differences between healthy and diseased corals and also between polluted and nonpolluted reef sites were observed. The formal calculation of diversity parameters suggested that evenness in particular was driven by both health status and reef site location. damicornis were mainly (93%) colonized by unicellular cyanobacteria. At a reef site exposed to pollution from intensive fish cage (Chanos chanos) farming, healthy P. At the same time, reef-site-specific clusters were formed as well. This cluster formation was dominated by principal component 1 with the genus Vibrio accounting for 18%. On the other hand, separate PCA clusters were obtained from healthy and diseased corals belonging to a single species (Pocillopora damicornis) only. An attempt to separate the profiles of healthy and diseased specimens by applying principal component analysis (PCA) to a (nonselective) collection of corals (affected by various diseases) proved unsuccessful.
Coral taxa tended to show specific community profiles.
Oligonucleotide probes targeted 13 phylotypes representing the main taxonomic groups of marine prokaryotes. In pairwise samples of visually healthy and diseased coral specimens from Bolinao Bay (Pangasinan, Philippines), mixed biofilm communities of ectoderm- and mucus-colonizing epizoic prokaryotes were compared using fluorescent in situ hybridization (FISH). In search for microbiological indicators of coral health and coral diseases, community profiles of coral-associated epizoic prokaryotes were investigated because of their dual potential as a source of coral pathogens and their antagonists. Epizoic communities of prokaryotes on healthy and diseased scleractinian corals in Lingayen Gulf, Philippines.
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