Table 2. Alpha diversity indices of the 16S rRNA gene sequences (OTUs at 97% cut-off) for each treatment and the natural pools.

	Sobs	Chao1	Shannon (H’)	Simpson (1/D)	Berger-Parker (BP)	Good’s coverage
Pools	60	129.2 (91.6–197.5)	3.91 (3.76–4.09)	0.015 (0.008–0.021)	0.075	58.2%
Control	69	228.6 (141.6–423.3)	4.02 (3.84–4.22)	0.017 (0.006–0.029)	0.11	47.1%
UVmin	66	182.9 (120.2–319.7)	3.93 (3.74–4.12)	0.019 (0.009–0.03)	0.085	51.9%
UVplus	42	76.4 (55.2–120.4)	3.01 (2.7–3.32)	0.115 (0.058–0.172)	0.338	69.1%
40C	41	176.3 (85.9–408.7)	3.21 (2.98–3.44)	0.065 (0.032–0.079)	0.165	70.2%
Fluct	52	101.9 (72.5–179.4)	3.63 (3.47–3.81)	0.029 (0.016–0.038)	0.122	64%

Confidence interval of each index in brackets; Sobs is the observed richness.