Table 1.
Comparison of the relative abundances (%) of the most abundant taxa (>2.5% of reads at phylum level) in all the samples (n = 200) with the MeHg hotspots (n = 34) based on 16S rRNA sequences.
| Most abundant taxa | Mean ± SD | Maximum | Minimum | |||
|---|---|---|---|---|---|---|
| All samples | Hotspots | All samples | Hotspots | All samples | Hotspots | |
| Acidobacteria | 36.11 ± 10.53 | 25.57 ± 8.77 | 73.64 | 49.29 | 8.10 | 9.40 |
| Proteobacteria | 13.99 ± 4.03 | 16.56 ± 2.96 | 28.13 | 27.60 | 2.90 | 8.87 |
| Alphaproteobacteria | 6.83 ± 3.01 | 7.13 ± 2.81 | 16.43 | 13.95 | 1.77 | 2.66 |
| Deltaproteobacteria | 3.31 ± 1.69 | 3.56 ± 1.38 | 13.36 | 7.15 | 0.71 | 1.30 |
| Gammaproteobacteria | 2.06 ± 1.33 | 1.48 ± 0.76 | 7.15 | 3.66 | 0.24 | 0.35 |
| Betaproteobacteria | 1.78 ± 2.13 | 4.14 ± 2.47 | 11.11 | 10.46 | 0.00 | 0.65 |
| Epsilonproteobacteria | 0.01 ± 0.03 | 0.03 ± 0.06 | 0.30 | 0.24 | 0.00 | 0.00 |
| Planctomycetes | 8.18 ± 4.21 | 5.82 ± 2.77 | 24.82 | 11.64 | 1.36 | 1.95 |
| Bacteroidetes | 6.61 ± 5.24 | 11.38 ± 7.92 | 51.60 | 51.60 | 0.41 | 1.60 |
| Parcubacteria | 6.35 ± 4.19 | 9.01 ± 5.14 | 26.36 | 24.47 | 0.06 | 2.13 |
| Verrucomicrobia | 6.28 ± 2.78 | 5.30 ± 2.31 | 14.89 | 10.64 | 0.65 | 0.65 |
| Thaumarchaeota | 3.96 ± 2.77 | 2.53 ± 2.44 | 18.44 | 14.83 | 0.00 | 0.00 |
| Actinobacteria | 3.11 ± 2.38 | 2.94 ± 1.62 | 19.86 | 6.03 | 0.47 | 0.89 |
| Chlamydiae | 2.83 ± 2.56 | 1.31 ± 1.08 | 22.87 | 3.71 | 0.24 | 0.30 |
| Chloroflexi | 2.60 ± 3.18 | 7.16 ± 5.18 | 17.79 | 15.19 | 0.00 | 0.12 |
| Others | 9.97 ± 0.89 | 12.41 ± 1.66 | 17.14 | 8.98 | 0.00 | 0.00 |
Relative abundances of classes under phylum Proteobacteria are listed with indent (SD: Standard deviation).