Table 3.
Results of GLM assessing how trematode resource level (snail tissue) is affected by trematode assemblage diversity and other predictor variables.
| predictor | d.f. | SS | F-ratio | r2 | p |
|---|---|---|---|---|---|
| diversity (mixed or single species) | 1 | 0.009 | 7.55a | 0.09 | 0.0039b |
| assemblage (diversity)c | 30 | 0.070 | 3.86 | 0.44 | <0.0001 |
| season (summer or winter) | 1 | 0.008 | 13.24 | 0.08 | 0.0004 |
| habitat (channel or flat) | 1 | 0.003 | 5.42 | 0.03 | 0.0212 |
| total tissue weight | 1 | 0.564 | 936.67 | 0.86 | <0.0001 |
| full model | 34 | 0.932 | 45.51 | 0.91 | <0.0001 |
| residual | 150 | 0.090 |
a
The synthesized denominator mean squared error for this test was 0.0012, with 62 d.f.
b
One-tailed p-value.
c
The particular species (15 spp.) or species-pair combination (17 types) as a random factor nested within if an assemblage was mixed or single species.