Table 2.

Similarities of bacterial community structure within a habitat and between pairs of habitats expressed as Bray-Curtis distances.

Habitat	India oil refineries	Arctic	China oil refineries	Mangrove	Marine sediments	Taiga upper active layer	Taiga bottom active layer	Taiga permafrost layer	Oil sands core	Oil sands tailings pond upper	Oil sands tailings pond median	Oil sands tailings pond deep
India oil refineries (I)	0.63 ±  0.06	0.51 ± 0.07	0.39 ± 0.03	0.44 ± 0.04	0.47 ± 0.04	0.41 ± 0.06	0.41 ± 0.04	0.36 ± 0.05	0.48 ± 0.04	0.46 ± 0.08	0.46 ± 0.08	0.48 ± 0.08
Arctic (A)	0.51 ± 0.07	0.72 ±  0.07	0.48 ± 0.05	0.46 ± 0.03	0.42 ± 0.06	0.45 ± 0.07	0.41 ± 0.05	0.39 ± 0.05	0.49 ± 0.05	0.39 ± 0.05	0.39 ± 0.04	0.41 ± 0.06
China oil refineries (C)	0.39 ± 0.03	0.48 ± 0.05	0.69 ±  0.08	0.48 ± 0.02	0.40 ± 0.05	0.38 ± 0.06	0.35 ± 0.05	0.34 ± 0.06	0.37 ± 0.06	0.32 ± 0.02	0.35 ± 0.04	0.34 ± 0.05
Mangrove (M)	0.44 ± 0.04	0.46 ± 0.03	0.48 ± 0.02	0.83 ±  0.02	0.54 ± 0.05	0.34 ± 0.03	0.34 ± 0.02	0.31 ± 0.02	0.36 ± 0.02	0.41 ± 0.02	0.43 ± 0.04	0.41 ± 0.05
Marine sediments (DWH)	0.47 ± 0.04	0.42 ± 0.06	0.40 ± 0.05	0.54 ± 0.05	0.77 ±  0.09	0.35 ± 0.05	0.35 ± 0.02	0.33 ± 0.05	0.43 ± 0.02	0.38 ± 0.03	0.39 ± 0.03	0.42 ± 0.04
Taiga upper active layer (Tu)	0.41 ± 0.06	0.45 ± 0.07	0.38 ± 0.06	0.34 ± 0.03	0.35 ± 0.05	0.52 ±  0.18	0.59 ± 0.17	0.52 ± 0.18	0.45 ± 0.09	0.34 ± 0.06	0.35 ± 0.05	0.37 ± 0.07
Taiga bottom active layer (Tb)	0.41 ± 0.04	0.41 ± 0.05	0.35 ± 0.05	0.34 ± 0.02	0.35 ± 0.02	0.59 ± 0.17	0.57 ±  0.12	0.55 ± 0.20	0.45 ± 0.05	0.33 ± 0.04	0.34 ± 0.04	0.37 ± 0.06
Taiga permafrost layer (Tp)	0.36 ± 0.05	0.39 ± 0.05	0.34 ± 0.06	0.31 ± 0.02	0.33 ± 0.05	0.52 ± 0.18	0.55 ± 0.20	0.45 ±  0.22	0.42 ± 0.10	0.32 ± 0.06	0.33 ± 0.05	0.36 ± 0.08
Oil sands core (OSC)	0.48 ± 0.04	0.49 ± 0.05	0.37 ± 0.06	0.36 ± 0.02	0.43 ± 0.02	0.45 ± 0.09	0.45 ± 0.05	0.42 ± 0.10	0.85 ±  0.09	0.45 ± 0.05	0.45 ± 0.04	0.56 ± 0.10
Oil sands tailings pond upper (OSTPu)	0.46 ± 0.08	0.39 ± 0.05	0.32 ± 0.02	0.41 ± 0.02	0.38 ± 0.03	0.34 ± 0.06	0.33 ± 0.04	0.32 ± 0.06	0.45 ± 0.05	0.67 ±  0.12	0.64 ± 0.09	0.63 ± 0.13
Oil sands tailings pond median (OSTPm)	0.46 ± 0.08	0.39 ± 0.04	0.35 ± 0.04	0.43 ± 0.04	0.39 ± 0.03	0.35 ± 0.05	0.34 ± 0.04	0.33 ± 0.05	0.45 ± 0.04	0.64 ± 0.09	0.56 ±  0.05	0.61 ± 0.12
Oil sands tailings pond deep (OSTPd)	0.48 ± 0.08	0.41 ± 0.06	0.34 ± 0.05	0.41 ± 0.05	0.42 ± 0.04	0.37 ± 0.07	0.37 ± 0.06	0.36 ± 0.08	0.56 ± 0.10	0.63 ± 0.13	0.61 ± 0.12	0.61 ±  0.15