Table 2. Diversity indices calculated from sequences of 16S rRNA genes using a 97% sequence similarity threshold.

Treatment	Total clones	Unique OTUs	Diversity sampled (%)	Shannon–Weaver	Chao1	Ace
CCA 27 °C 2 days	155	63	81	3.69	98	111
CCA 29 °C 2 days	135	53	80	3.48	76	95
CCA 31 °C 2 days	144	53	79	3.30	82	105
CCA 32 °C 2 days	171	51	88	3.21	76	77
CCA 27 °C 7 days	117	50	81	3.54	66	82
CCA 29 °C 7 days	157	70	72	3.73	174	179
CCA 31 °C 7 days	155	63	71	3.41	98	116
CCA 32 °C 7 days	142	51	76	3.23	93	126
Sed 27 °C 2 days	65	54	29	3.90	234	296
Sed 32 °C 2 days	62	55	23	3.97	196	244
Sed 27 °C 7 days	69	55	36	3.91	165	212
Sed 32 °C 7 days	64	54	29	3.93	202	215

Abbreviations: CCA, crustose coralline algae; OTU, operational taxonomic unit, Sed, sediment.