TABLE 3.
Metrics of bacterial community composition and structure across haloalkaline environments
| Environment type | Total no. of sequence reads | Total no. of OTUs | No. of known OTUsa (% of total OTUs) | OTU level Shannon diversity index (H′OTU)b | Source or reference |
|---|---|---|---|---|---|
| Engineered haloalkaline environments | |||||
| Bauxite residue | 65,541 | 3,611 | 367 (10) | 3.15–6.70 | This study |
| Oil sands tailings | 11,900 | 2,039 | 140 (7) | 8.29 | This study |
| Chromite ore processing residue | 99 | 26 | 12 (46) | 0.75–2.32 | 58 |
| Uranium mill tailings | 199 | 59 | 37 (63) | —c | 57 |
| Steel slag | 16 | 15 | 2 (13) | — | 56 |
| Natural haloalkaline environments | |||||
| Tirez Lagoon, Spain | 137 | 42 | 23 (55) | 1.56–1.88 | 55 |
| Kenyan soda lakes | 29 | 26 | 0 (0) | — | 54 |
a
“known” is defined as matching at ≥97% to a reference sequence in the GreenGenes database.
b
H′OTU designates Shannon diversity in discrete samples.
c
—, parameter unable to be determined on the basis of published data.