TABLE 3.
Effects on bacterial production (g C m−2 day−1) of marsh habitats (littoral water, epiphytic biofilm, sediment, and plant litter), position in the marsh (landward, center, or lakeward) and time (sampling month) as analyzed by repeated-measure analysis of variancea
| Source of variation | SS | df | F |
|---|---|---|---|
| Between subjects | |||
| Compartment | 2,975.0 | 3 | 193.0*** |
| Position | 4.4 | 2 | 0.4 |
| Compartment × position | 14.3 | 6 | 0.5 |
| Error | 61.7 | 12 | |
| Within subjects | |||
| Time | 300.0 | 11 | 26.2*** |
| Time × compartment | 124.0 | 33 | 3.6*** |
| Time × position | 23.5 | 22 | 1.0 |
| Time × compartment × position | 57.5 | 66 | 0.8 |
| Error | 137.3 | 132 |
a
SS, sum of squares; df, degree of freedom; ∗∗∗, P < 0.001.