TABLE 3.

Highly abundant (>0.1 mean relative abundance of total community ± SD) OTUs identified as contributing significantly (P < 0.01) to the differences between the cup and stem of Cliona patera.

OTU	Phylum	Lowest taxonomic classification	Mean relative abundance
			Cup	Stem
4	Proteobacteria	Order Chromatiales	1.690 ± 0.226	0.632 ± 0.107
6	Proteobacteria	Class Gammaproteobacteria	1.715 ± 0.186	0.575 ± 0.266
8	Proteobacteria	Order Rhodobacteraceae	1.393 ± 0.188	0.453 ± 0.141
15	Proteobacteria	Class Gammaproteobacteria	1.165 ± 0.339	0.341 ± 0.144
20	Proteobacteria	Order Rhodospirillales	0.568 ± 0.091	0.422 ± 0.132
27	Proteobacteria	Family Erythrobacteraceae	0.706 ± 0.195	0.145 ± 0.067
28	Proteobacteria	Class Gammaproteobacteria	0.683 ± 0.096	0.162 ± 0.081
30	Proteobacteria	Class Betaproteobacteria	0.401 ± 0.102	0.291 ± 0.045
33	Proteobacteria	Order Rhodospirillales	0.337 ± 0.068	0.240 ± 0.071
34	Proteobacteria	Class Gammaproteobacteria	0.304 ± 0.077	0.237 ± 0.067
36	Proteobacteria	Class Gammaproteobacteria	0.397 ± 0.068	0.141 ± 0.077
37	Proteobacteria	Family Rhodospirillaceae	0.288 ± 0.051	0.247 ± 0.116
43	Proteobacteria	Class Gammaproteobacteria	0.328 ± 0.048	0.112 ± 0.029
57	Proteobacteria	Class Alphaproteobacteria	0.210 ± 0.048	0.153 ± 0.038
61	Bacteroidetes	Family Flavobacteriaceae	0.252 ± 0.054	0.093 ± 0.022
67	Actinobacteria	Genus Ilumatobacter	0.181 ± 0.047	0.038 ± 0.020
72	Proteobacteria	Genus Porphyrobacter	0.244 ± 0.060	0.053 ± 0.013
74	Proteobacteria	Class Gammaproteobacteria	0.179 ± 0.040	0.126 ± 0.024
89	Proteobacteria	Order Rhodospirillales	0.125 ± 0.020	0.103 ± 0.032
91	Bacteroidetes	Family Flavobacteriaceae	0.179 ± 0.071	0.028 ± 0.027
93	Proteobacteria	Class Gammaproteobacteria	0.109 ± 0.025	0.090 ± 0.034
94	Proteobacteria	Order Myxococcales	0.082 ± 0.033	0.104 ± 0.068
95	Proteobacteria	Class Gammaproteobacteria	0.143 ± 0.025	0.052 ± 0.013
98	Actinobacteria	Class Actinobacteria	0.140 ± 0.036	0.045 ± 0.017
100	Proteobacteria	Class Alphaproteobacteria	0.104 ± 0.022	0.086 ± 0.027
102	Nitrospirae	Genus Nitrospira	0.037 ± 0.027	0.149 ± 0.119
103	Actinobacteria	Class Actinobacteria	0.133 ± 0.033	0.043 ± 0.008
106	Actinobacteria	Order Acidimicrobiales	0.132 ± 0.031	0.035 ± 0.013
107	Proteobacteria	Genus Haliea	0.107 ± 0.017	0.074 ± 0.014
110	Bacteroidetes	Genus Robiginitalea	0.140 ± 0.059	0.024 ± 0.010
113	Proteobacteria	Genus Thiohalomonas	0.117 ± 0.038	0.025 ± 0.019
135	Bacteroidetes	Family Flavobacteriaceae	0.106 ± 0.021	0.030 ± 0.006
139	Proteobacteria	Family Rhodospirillaceae	0.112 ± 0.050	0.022 ± 0.010
147	Unclassified	Bacteria	0.107 ± 0.037	0.018 ± 0.009