Table 3. Analyses of variance of some of the most abundant taxonomic groups in each treatment.
Site (Si) was random with 2 levels. Habitat type (Ha) and Contaminant (Contam) were fixed and orthogonal, with 2 and 5 levels, respectively; n = 3. Data were pooled when p > 0.25.
| Source | df | Bivalvest | Amphipods | ||
|---|---|---|---|---|---|
| MS | Pseudo-F | MS | Pseudo-F | ||
| Site (Si) | 1 | 2.5 | 11.85** | 16.0 | 52.84** |
| Habitat type (Ha) | 1 | 0.7 | 3.13ns | 0.2 | 0.61ns |
| Contaminant (Contam) | 4 | ||||
| C1—Control vs Carbaryl | 1 | 0.1 | 0.49ns | 0.0 | 0.00ns |
| C2—Control vs Iron | 1 | 0 .0 | 0.42ns | 0.0 | 0.00ns |
| C3—Control vs Metal | 1 | 0.0 | 0.20ns | 0.0 | 0.00ns |
| C4—Control vs Blank | 1 | 0.2 | 0.91ns | 0.0 | 0.00ns |
| Ha × Contam | 4 | ||||
| Ha × C1 | 1 | 1.3 | 5.28* | 1.0 | 4.56* |
| Ha × C2 | 1 | 0.6 | 3.23ns | 1.0 | 3.09ns |
| Ha × C3 | 1 | 0.8 | 3.01ns | 1.3 | 4.15ns |
| Ha × C4 | 1 | 1.1 | 5.79* | 0.2 | 0.82ns |
| Pooled | 49 | 0.2 | 0.3 | ||
| Total | 59 | ||||
| Pair-wise tests | Not conclusive | ||||
Notes.
ns, not significant (p > 0.05).
*
p < 0.05.
**
p < 0.01.
t
= data were log(x + 1) transformed when Cochran’s test p < 0.05.