Table 1.
Comparison of the effects of indigenous microbiota and water type on E. coli decrease in the water column and sedimentsa
| Source of variation | % of total variation | P value |
|---|---|---|
| Water column (n = 5) | ||
| Freshwater vs seawater | 40.1 | <0.0001 |
| Natural vs disinfected | 49.2 | <0.0001 |
| Interaction | 9.74 | <0.0001 |
| Sediments (n = 5) | ||
| Freshwater vs seawater | 49.1 | <0.0001 |
| Natural vs disinfected | 38.9 | <0.0001 |
| Interaction | 9.38 | <0.0001 |
| Post hoc tests (natural vs disinfected) | ||
| Water column | ||
| Freshwater | <0.0001 | |
| Seawater | <0.0001 | |
| Sediment | ||
| Freshwater | <0.0001 | |
| Seawater | <0.0001 |
a
Shown are the effects of indigenous microbiota and water type (freshwater versus seawater) on E. coli decrease in the water column and sediments from the March and April experiments. Statistical significance was determined by two-way ANOVA.