Table 2.
Slopes, intercepts, coefficients of determination (r2) and significance levels (P) of orthogonal regressions of log-transformed cell abundances g-1 dry mass estimated by FCM, EM, and ATP assays of samples from five different types of environments.
| Environment | N | FCM vs. EM |
FCM vs. ATP |
||||||
|---|---|---|---|---|---|---|---|---|---|
| Slope | Intercept | r2 | P | Slope | Intercept | r2 | P | ||
| All environments | 55 | 1.22 | -2.6 | 0.10 | 0.020∗ | 0.36 | 4.8 | 0.19 | 0.001∗ |
| Stream sediments | 12 | 1.14 | -1.5 | 0.77 | <0.001∗ | 0.31 | 5.3 | 0.32 | 0.054 |
| Lake sediments | 15 | 2.07 | -10.8 | 0.48 | 0.004∗ | 0.54 | 2.8 | 0.44 | 0.007∗ |
| Filter sludge | 8 | 0.27 | 6.4 | 0.17 | 0.312 | 0.13 | 7.6 | <0.01 | 0.866 |
| Natural soils | 12 | 0.59 | 3.1 | 0.08 | 0.367 | 0.34 | 5.1 | 0.31 | 0.058 |
| Agricultural soils | 8 | 7.51 | -63 | 0.02 | 0.750 | 15 | -142 | 0.02 | 0.709 |
∗p < 0.05.