TABLE 1.

Indicator operational taxonomic units

Indicator OTUa	Taxonomic classificationb	P value
Polyps
Native
OTU0016	Melitea salexigens	0.001
OTU0083	Uncl. Glaciecola	0.041
OTU0120	Melitea salexigens	0.005
OTU0220	Uncl. Sinobacteraceae	0.007
Recolonized
OTU0015	Neptuniibacter caesariensis	0.003
OTU0121	Uncl. Oceanospirillaceae	0.001
OTU0130	Uncl. Bacteriovorax	0.001
OTU0131	Uncl. Flavobacteriales	0.001
OTU0134	Uncl. Pseudoalteromonas	0.001
OTU0179	Uncl. Ruegeria	0.001
Native microbiota
OTU0009	Uncl. Cyanobacteria	0.004
OTU0073	Uncl. Gammaproteobacteria	0.001
OTU0126	Uncl. Gammaproteobacteria	0.001
Native in sterile environment
OTU0078	Uncl. Vibrio	0.009
OTU0267	Uncl. Gammaproteobacteria	0.020
Sterile in native environment
OTU0054	Lewinella cohaerens	0.006
OTU0082	Uncl. Flavobacteriaceae	0.001
OTU0128	Uncl. Polaribacter	0.003
OTU0141	Uncl. Balneola	0.005
OTU0218	Uncl. Fluviicola	0.001
OTU0241	Uncl. Polaribacter	0.004
Sterile with native food
OTU0048	Uncl. Plesiocystis	0.008
OTU0065	Uncl. Arcobacter	0.002
OTU0097	Uncl. Saprospiraceae	0.001
OTU0099	Uncl. Oleibacter	0.005
OTU0116	Uncl. Oleibacter	0.005
OTU0138	Uncl. Gammaproteobacteria	0.007
OTU0145	Uncl. Lactococcus	0.005
OTU0163	Microbacterium aurum	0.011
Sterile
Not detected
Native plus V. anguillarum
OTU0107	Uncl. Chromobacterium	0.001
OTU0155	Uncl. Flavobacteriaceae	0.009
OTU0258	Uncl. Proteobacteria	0.040
OTU0355	Uncl. Proteobacteria	0.016
OTU0203	Uncl. Vibrio	0.001
Sterile plus V. anguillarum
OTU0203	Uncl. Vibrio	0.003
Native plus P. espejiana
OTU0021	Uncl. Bizionia	0.002
OTU0052	Uncl. Proteobacteria	0.001
OTU0166	Micrococcus luteus	0.001
OTU0175	Rothia mucilaginosa	0.003
OTU0200	Uncl. Bacteria	0.001
OTU0098	Uncl. Pseudoalteromonas	0.004
Sterile plus P. espejiana
OTU0098	Uncl. Pseudoalteromonas	0.004
Native plus R. mobilis
OTU0077	Uncl. Nannocystis	0.005
OTU0093	Uncl. Cytophagales	0.003
OTU0142	Uncl. Prevotella	0.001
OTU0169	Uncl. Mogibacteriaceae	0.015
OTU0179	Uncl. Ruegeria	0.002
Sterile plus R. mobilis
OTU0179	Uncl. Ruegeria	0.002
Strobilae
Native
OTU0029	Uncl. Shewanella	0.007
OTU0142	Uncl. Prevotella	0.006
OTU0169	Uncl. Mogibacteriaceae	0.002
Recolonized
OTU0108	Uncl. Gammaproteobacteria	0.019
OTU0167	Uncl. Gammaproteobacteria	0.002
OTU0192	Uncl. HTTC	0.005
Native in sterile environment
OTU0162	Uncl. Staphylococcus	0.034
OTU0260	Uncl. Neptuniibacter	0.005
OTU0268	Uncl. Lewinella	0.001
Sterile in native environment
OTU0051	Uncl. Proteobacteria	0.033
OTU0052	Uncl. Proteobacteria	0.032
Sterile with native food
OTU0094	Uncl. Alteromonas	0.016
OTU0099	Uncl. Oleibacter	0.026
OTU0343	Uncl. Oceanospirillaceae	0.003
Sterile
Not detected
Native plus V. anguillarum
OTU0138	Uncl. Gammaproteobacteria	0.043
OTU0163	Uncl. Microbacterium	0.018
OTU0203	Uncl. Vibrio	0.048
OTU0252	Uncl. Alteromonas	0.005
OTU0324	Uncl. Arcobacter	0.009
Sterile plus V. anguillarum
OTU0203	Uncl. Vibrio	0.004
Native plus P. espejiana
OTU0098	Uncl. Pseudoalteromonas	0.003
OTU0173	Uncl. Haliangiaceae (Kofleriaceae)	0.017
Sterile plus P. espejiana
OTU0098	Uncl. Pseudoalteromonas	0.004
Native plus R. mobilis
OTU0077	Uncl. Nannocystis	0.013
OTU0082	Uncl. Flavobacteriaceae	0.002
OTU0103	Uncl. Streptococcus	0.005
OTU0175	Uncl. Rothia	0.009
OTU0179	Uncl. Ruegeria	0.006
Sterile plus R. mobilis
OTU0179	Uncl. Ruegeria	0.022

^aIndicator OTUs identified as key operational taxonomic units for the respective treatments.

^bUncl., unclassified.