Table 3.
Average (±SD) percent relative abundance of microorganisms belonging to genera known to contain mercury methylators; genera are listed from most abundant to least abundant for all treatments (n = 16 fields, 4 fields per treatment). The fold-change reflects the ratio between the average percent relative abundance of genera present in treatments 1–3 and treatment 4.
| Phylum | Class | Order | Family | Genus | Treatment 1 Flood | Treatment 2 AWD40-Flood |
Treatment 3 AWD60 |
Treatment 4 Furrow-irrigated |
All treatments | Fold-change |
|---|---|---|---|---|---|---|---|---|---|---|
| Proteobacteria | Deltaproteobacteria | Desulfuromonadales | Geobacteraceae | Geobacter | 0.029 (0.030) |
0.014 (0.0074) |
0.029 (0.010) |
0.011 (0.011) |
0.021 (0.097) |
2.2 |
| Chloroflexi | Anaerolinea | Anaerolineales | Anaerolineaceae | Anaerolinea | 0.0062 (0.0036) |
0.0046 (0.0029) |
0.0068 (0.0041) |
0.00060 (0.00018) |
0.0045 (0.0028) |
9.8 |
| Proteobacteria | Deltaproteobacteria | Desulfovibrionales | Desulfo-vibrionaceae | Desulfovibrio | 0.0016 (0.0012) |
0.00073 (0.00025) |
0.0019 (0.0012) |
0.000083 (0.00017) |
0.0011 (0.00084) |
17 |
| Proteobacteria | Deltaproteobacteria | Syntrophobacterales | Syntrophaceae | Syntrophus | 0.00071 (0.00047) |
0.00088 (0.00015) |
0.00048 (0.00029) |
0 | 0.00052 (0.00038) |
NA |
| Spirochaetae | Spirochaetes | Spirochaetales | Spirochaetaceae | Spirochaeta | 0.00033 (0.00031) |
0.00066 (0.0010) |
0.00071 (0.0010) |
0.00028 (0.00052) |
0.00050 (0.00022) |
2.0 |
| Proteobacteria | Deltaproteobacteria | Syntrophobacterales | Syntro-phorhabdaceae | Syntro-phorhabdus | 0.00046 (0.00033) |
0.00045 (0.00029) |
0.00042 (0.00047) |
0 | 0.00033 (0.00022) |
NA |
| Euryarchaeota | Methano-microbia | Methanomicrobiales | Methano-regulaceae | Methanoregula | 0.00056 (0.00065) |
0.00053 (0.00052) |
0.00020 (0.00036) |
0 | 0.00032 (0.00027) |
NA |
| Euryarchaeota | Methano-microbia | Methanocellales | Methano-cellaceae | Methanocella | 0.00054 (0.00060) |
0.000037 (0.00049) |
0.00037 (0.00043) |
0.0000083 (0.000012) |
0.00032 (0.00022) |
51 |
| Chloroflexi | Dehalo-coccoidetes | Dehalococcoidales | Dehalo-coccoidaceae | Dehalo-coccoides | 0.00038 (0.00040) |
0.00058 (0.00041) |
0.00018 (0.00021) |
0 | 0.00029 (0.00025) |
NA |
| Proteobacteria | Deltaproteobacteria | Syntrophobacterales | Syntrophaceae | Smithella | 0.000033 (0.000066) |
0.00017 (0.00033) |
0.00055 (0.00079) |
0 | 0.00019 (0.00025) |
NA |
| Proteobacteria | Deltaproteobacteria | Desulfarculales | Desul-farculaceae | Desulfarculus | 0 | 0 | 0.00030 (0.00060) |
0 | 0.000075 (0.00015) |
NA |
| Proteobacteria | Deltaproteobacteria | Desulfobacterales | Dessulfo-bulbaceae | Desulfobulbus | 0.00010 (0.00020) |
0.00012 (0.00011) |
0.000083 (0.00010) |
0 | 0.000075 (0.000052) |
NA |
| Firmicutes | Clostridia | Clostridiales | Peptococcaceae | Desulfo-sporosinus | 0.000050 (0.000064) |
0.00010 (0.00020) |
0.00012 (0.00011) |
0.000017 (0.000033) |
0.000071 (0.000046) |
5.3 |
| Bacteroidetes | Bacteroidia | Bacteroidales | Bacteroidaceae | Bacteroides | 0.00010 (0.00012) |
0.000083 (0.000084) |
0.000050 (0.000033) |
0.000033 (0.000038) |
0.000066 (0.000030) |
2.3 |
| Proteobacteria | Deltaproteobacteria | Syntrophobacterales | Syntrophaceae | Desulfomonile | 0.000033 (0.000066) |
0.000050 (0.000064) |
0.000066 (0.000054) |
0 | 0.000037 (0.000028) |
NA |
| Euryarchaeota | Methano-microbia | Methanomicrobiales | Methano-spirillaceae | Methano-spirillum | 0.000033 (0.000038) |
0.000017 (0.000033) |
0 | 0 | 0.000012 (0.000016) |
NA |
| All genera | 0.040 (0.025) |
0.023 (0.006) |
0.041 (0.010) |
0.012 (0.011) |
0.029 (0.018) |
2.9 |