Table 3.

Geometric mean (±standard error) of sequencing reads and alpha-diversity indices in sample groups

Parameter	Sewage influent	Sewage effluent	Industrial effluent	Mine runoff	Surface water	Pre-treated	GW observation well	Production well
Reads	34,300 ± 4300	26,200 ± 1800	20,600 ± 3700	13,300 ± 2200	24,200 ± 1100	32,700 ± 5400	15,900 ± 2600	11,300 ± 2100
OTUs	700 ± 40	800 ± 20	290 ± 40	1120 ± 50	890 ± 20	630 ± 40	470 ± 30	370 ± 10
Observed	490 ± 30	580 ± 10	170 ± 20	640 ± 20	730 ± 10	530 ± 30	320 ± 30	250 ± 10
ACE	940 ± 60	1080 ± 30	510 ± 40	1490 ± 60	1230 ± 20	880 ± 60	590 ± 40	480 ± 20
Chao1	630 ± 40	720 ± 10	300 ± 30	810 ± 30	920 ± 10	710 ± 40	410 ± 30	320 ± 20
Shannon	3.96 ± 0.15	4.15 ± 0.07	2.74 ± 0.26	5.35 ± 0.22	4.91 ± 0.02	3.99 ± 0.10	4.60 ± 0.07	4.15 ± 0.09
Simpson	0.91 ± 0.01	0.92 ± 0.01	0.78 ± 0.03	0.97 ± 0.01	0.98 ± 0.00	0.94 ± 0.01	0.96 ± 0.00	0.93 ± 0.01