Table 2.
Comparison of the effects of the indigenous microbiota and matrix on E. coli decrease in freshwater and seawater mesocosmsa
| Source of variation | % of total variation | P value |
|---|---|---|
| Freshwater (n = 5) | ||
| Water vs sediment | 36.5 | <0.0001 |
| Natural vs disinfected | 41.6 | <0.0001 |
| Interaction | 20.5 | <0.0001 |
| Seawater (n = 5) | ||
| Water vs sediment | 74.8 | <0.0001 |
| Natural vs disinfected | 24.1 | <0.0001 |
| Interaction | 0.49 | 0.004 |
| Post hoc tests (natural vs disinfected) | ||
| Freshwater | ||
| Water | <0.0001 | |
| Sediments | <0.001 | |
| Seawater | ||
| Water | <0.0001 | |
| Sediments | <0.0001 |
a
Shown are the effects of the indigenous microbiota and matrix on E. coli decrease in freshwater and seawater mesocosms from the March and April experiments. Statistical significance was determined by two-way ANOVA.