Table 3.
Source of variation | % of total variation | P value |
---|---|---|
Water vs sediment | 55.4 | <0.0001 |
Treatmentb | 35.7 | <0.0001 |
Interaction | 1.48 | 0.11 |
Post hoc tests | ||
Natural vs disinfected | ||
Water | <0.0001 | |
Sediment | <0.0001 | |
Natural vs antimicrobial treated | ||
Water | <0.05 | |
Sediment | >0.05 |
Shown are the effects of treatment (natural, antimicrobial treated, or disinfected) and matrix on E. coli decrease in freshwater mesocosms (n = 5) for the September experiment. Statistical significance was determined by two-way ANOVA.
Natural (all indigenous microbiota present), antimicrobial treated (cycloheximide addition), and disinfected.