Table 2.
Relative abundance [%, (1 SE)] of bacterial phyla and subphyla (rows) in stream compartments (columns) including analysis of variance (ANOVA) results for among-compartment comparisons: omnibus results in first column, and significant multiple comparisons groups (Bonferonni post hoc test, α = 0.05) in lower case superscripts (a-d).
| ANOVA results (F, P) | Water column | Epilithon | CPOM | Fine benthic organic matter (FBOM) | Sediment | |
|---|---|---|---|---|---|---|
| Acidobacteria | 60.9, <0.0001 |
0.69a (0.24) |
1.20ab (0.82) |
0.91ab (0.51) |
56.0d (9.9) |
7.40c (2.2) |
| Actinobacteria | 3.15, 0.022 |
9.70b (1.8) |
0.65a (0.40) |
4.48ab (1.8) |
2.33ab (1.3) |
4.81ab (0.83) |
| Bacteroidetes | 4.02, 0.007 |
12.5a (9.3) |
25.0b (13) |
8.79a (6.4) |
4.33a (1.5) |
14.5ab (8.1) |
| Cyanobacteria | 2.46, 0.058 |
3.57ab (1.4) |
8.69b (5.6) |
3.25ab (0.98) |
0.00a (0) |
0.88ab (0.44) |
| Firmicutes | 0.319, 0.864 |
4.09 (1.8) |
3.27 (2.7) |
2.41 (2.4) |
3.17 (1.0) |
1.68 (0.58) |
| Planctomycetes | 0.852, 0.499 |
1.03 (0.34) |
1.10 (1.1) |
0.82 (0.50) |
2.33 (0.44) |
1.91 (0.65) |
| Alphaproteobacteria | 2.74, 0.039 |
11.1 (2.0) |
21.6 (8.4) |
23.8 (6.8) |
6.17 (1.1) |
10.2 (1.6) |
| Betaproteobacteria | 2.26, 0.076 |
32.6 (2.7) |
20.2 (5.4) |
25.2 (6.6) |
9.33 (6.2) |
17.3 (2.4) |
| Deltaproteobacteria | 1.27, 0.296 |
2.50 (0.51) |
1.17 (0.57) |
2.27 (0.69) |
4.50 (2.3) |
5.04 (1.7) |
| Gammaproteobacteria | 1.96, 0.115 |
7.26 (1.1) |
12.7 (6.2) |
21.9 (8.3) |
6.17 (2.5) |
16.5 (3.6) |
| Verrucomicrobia | 2.10, 0.095 |
3.07 (0.92) |
2.64 (1.97) |
0.36 (0.28) |
0.00 (0) |
3.30 (0.64) |
| Other bacteria | 3.03, 0.026 |
11.9ab (2.3) |
1.78a (0.87) |
7.59ab (2.8) |
5.33ab (3.0) |
16.5b (2.8) |