Table 2. Results of a logistic regression model, estimating how the probability of finding O. europaea depends on ontogenetic stage (adults [reference level], sapling, seedling) and environmental conditions and human disturbance (logging intensity) in Hugumburda dry Afromontane forest in northern Ethiopia.
Estimate | SE | z | p | |
---|---|---|---|---|
Intercept (Adult) | -0.136 | 0.07 | -2.1 | 0.037 |
Sapling | -0.139 | 0.12 | -1.0 | 0.317 |
Seedling | 0.275 | 0.45 | 0.6 | 0.542 |
Woody species richness | 0.269 | 0.08 | 3.2 | 0.001 |
Soil depth | -0.051 | 0.09 | -0.6 | 0.554 |
Elevation | 0.213 | 0.07 | 3.1 | 0.002 |
Slope | 0.217 | 0.07 | 3.2 | 0.001 |
Logging intensity | 0.253 | 0.08 | 3.3 | 0.001 |
Seedling × Woody species richness | -0.958 | 0.61 | -1.6 | 0.114 |
Sapling × Woody species richness | 0.467 | 0.17 | 2.8 | 0.006 |
Seedling × Soil depth | 1.207 | 0.57 | 2.1 | 0.035 |
Sapling × Soil depth | -0.646 | 0.17 | -3.8 | <0.001 |
Seedling × Slope | 0.580 | 0.45 | 1.3 | 0.201 |
Sapling × Slope | -0.324 | 0.13 | -2.4 | 0.014 |
Seedling × Logging intensity | 0.321 | 0.56 | 0.6 | 0.566 |
Sapling × Logging intensity | -0.687 | 0.19 | -3.6 | <0.001 |
The table shows parameter estimates and associated standard errors for a binary generalized linear model, where the response had two possible outcomes Y (empirical observation) = 1 and Y (simulated observation) = 0. Simulated observations were generated by random relocations of the empirical observations of O. europaea in 70 sample plots. Figures in bold are statistically significant at P < 0.05.