Table 2.
Change in earthworm numbers and biomass from start to end of the experiment in response to light pollution (LP), plant species (PS), sowing depth (SD), their interactions, and the covariates initial worm weight and soil moisture. ChiSq = Likelihood ratio Chi squared, df = degrees of freedom, Significance code for Pr(> ChiSq) and Pr(> F): *** <0.001, ** <0.01, * <0.05
| Earthworm number change | Earthworm biomass change | |||
|---|---|---|---|---|
| Parameters | Df | Pr (> ChiSq) | Df | Pr (> F) |
| Light pollution (LP) | 1 | 0.015* | 1 | 0.169 |
| Plant species (PS) | 1 | 0.573 | 1 | 0.097 |
| Sowing depth (SD) | 1 | 0.220 | 1 | 0.305 |
| LP x PS | 1 | 0.474 | 1 | 0.371 |
| LP × SD | 1 | 0.891 | 1 | 0.429 |
| PS × SD | 1 | 0.198 | 1 | 0.069 |
| LP × SD × PS | 1 | 0.054 | 1 | 0.437 |
| Initial worm weight (g) | 1 | 0.118 | 1 | 0.011* |
| Soil moisture (%) | 1 | 0.056 | 1 | 0.547 |
| Residuals | 33 | |||