Table 3.
ANCOVA results for the effects of forest age on mean individual biomass, the Shannon-Weiner diversity index, Pielou’s evenness and Margalef’s richness of carabid beetles, followed by the Scheffé post-hoc test.
| Variables | SS | DF | MS | F | P | Scheffé test |
| Dependant variable: MIB (g) | ||||||
| Corrected Model | 0.100 | 3 | 0.033 | 39.883 | 0.001 | |
| Intercept | 0.079 | 1 | 0.079 | 95.071 | 0.000 | |
| Species that hibernate as larvae | 0.045 | 1 | 0.045 | 54.156 | 0.001 | 150>80=60 |
| Forest age (years) | 0.010 | 2 | 0.005 | 5.712 | 0.051 | |
| Error | 0.004 | 5 | 0.001 | |||
| R2 = 0.960 (Adjusted R2 = 0.963) | ||||||
| Dependant variable : Shannon-Wiener index | ||||||
| Corrected Model | 0.796 | 3 | 0.265 | 7.268 | 0.028 | |
| Intercept | 2.184 | 1 | 2.184 | 59.831 | 0.001 | |
| Species that hibernate as larvae | 0.265 | 1 | 0.265 | 7.251 | 0.043 | 80>150=60 |
| Forest age (years) | 0.338 | 2 | 0.169 | 4.634 | 0.073 | |
| Error | 0.183 | 5 | 0.037 | |||
| R2 = 0.813 (Adjusted R2 = 0.702) | ||||||
| Dependant variable: Pielou’s evenness | ||||||
| Corrected Model | 0.055 | 3 | 0.018 | 2.786 | 0.149 | |
| Intercept | 0.414 | 1 | 0.414 | 63.233 | 0.001 | |
| Species that hibernate as larvae | 0.026 | 1 | 0.026 | 3.948 | 0.104 | |
| Forest age (years) | 0.011 | 2 | 0.005 | 0.804 | 0.498 | |
| Error | 0.033 | 5 | 0.007 | |||
| R2 = 0.626 (Adjusted R2 = 0.401) | ||||||
| Dependant variable: Margalef richness | ||||||
| Corrected Model | 1.651 | 3 | 0.550 | 1.099 | 0.431 | |
| Intercept | 3.558 | 1 | 3.558 | 7.106 | 0.045 | |
| Species that hibernate as larvae | 0.722 | 1 | 0.722 | 1.442 | 0.284 | |
| Forest age (years) | 0.919 | 2 | 0.459 | 0.918 | 0.458 | |
| Error | 2.504 | 5 | 0.501 | |||
| R2 = 0.397 (Adjusted R2 = 0.036) | ||||||