Table 4.
Results of two-way ANOVA for the effects of region and trajectory (linear or stable)a on three measures of community temporal invariability (species richness (a), species composition (b), and community abundance (c)).
| Source of variation | df | MS | F | P |
|---|---|---|---|---|
| (a) Species richness | ||||
| Region | 5 | 0.05431 | 4.209 | 0.00174 |
| Trajectorya | 1 | 0.00417 | 0.323 | 0.57113 |
| Region × Trajectory | 4 | 0.05376 | 4.166 | 0.00383 |
| Residuals | 91 | 0.01291 | ||
| Transformation: log10 | ||||
| Levene's test: F = 1.7328, P > 0.05 | ||||
| (b) Species composition | ||||
| Region | 5 | 0.020171 | 13.978 | < 0.001 |
| Trajectorya | 1 | 0.000529 | 0.366 | < 0.5464 |
| Region × Trajectory | 4 | 0.002939 | 2.037 | < 0.0958 |
| Residuals | 91 | 0.001443 | ||
| Transformation: log10 | ||||
| Levene's test: F = 1.5378, P > 0.05 | ||||
| (c) Community abundance | ||||
| Region | 5 | 1.1666 | 29.392 | < 0.001 |
| Trajectorya | 1 | 0.0213 | 0.537 | < 0.465 |
| Region × Trajectory | 4 | 0.0684 | 1.725 | < 0.151 |
| Residuals | 91 | 0.0397 | ||
| Transformation: log10 | ||||
| Levene's test: F = 0.7907, P > 0.05 | ||||
aPlease see main text for a description of community trajectories.