Table 2. Number of total, transient, resident and core OTUs observed in sponge and seawater replicates.

Sample type	Total OTUs	Occasional OTUs	Variable OTUs	Core OTUs
C. concentrica	52	24 (11.0% ± 5.2)	28 (88.9% ± 13)	0 (0%)
Scopalina sp.	56	27 (35.7% ± 9.3)	29 (64.2% ± 10.7)	0 (0%)
T. anhelans	49	32 (11.9% ± 5.4)	16 (73.2% ± 10.2)	1 (19.5% ± 35)
Seawater	76	44 (5% ± 3.7)	32 (94% ± 13.7)	0

Note:

Numbers in brackets are the sum of the mean relative abundances of reads (percentages ± standard deviations).