Table 1.
Analyses of landscape impacts on gene flow among populations of two amphibian species
| Rana temporaria | Triturus alpestris | |||||
|---|---|---|---|---|---|---|
| Source | Estimate | P-value | 95% CI | Estimate | P-value | 95% CI |
| A. Type of land cover | ||||||
| Intercept | 3.185 | 0.0570 | 4.079 | 0.0001 | ||
| Forest | 0.093 | 0.1185 | −0.056, 0.250 | 0.180 | 0.1262 | −0.118, 0.487 |
| Field | −0.086 | 0.0203 | −0.169, −0.003 | −0.019 | 0.3885 | −0.138, 0.099 |
| Urban | −0.181 | 0.0000 | −0.283, −0.079 | −0.365 | 0.0000 | −0.547, −0.169 |
| B. Landscape element | ||||||
| Intercept | 3.268 | 0.0215 | 4.156 | 0.0001 | ||
| Distance (km) | −0.029 | 0.2028 | −0.097, 0.038 | 0.128 | 0.0127 | 0.018, 0.239 |
| Rivers | 0.189 | 0.1781 | −0.227, 0.583 | 0.128 | 0.3703 | −0.637, 0.871 |
| Secondary roads | −0.016 | 0.0318 | −0.034, −0.001 | −0.050 | 0.0003 | −0.082, −0.015 |
| Divided highways | −0.118 | 0.0955 | −0.296, 0.061 | −0.511 | 0.0012 | −0.873, −0.140 |
| C. Building and pond density | ||||||
| Intercept | 3.346 | 0.0001 | 4.242 | 0.0001 | ||
| Lens area (ha) | −0.006 | 0.0173 | −0.012, 0.001 | −0.001 | 0.4111 | −0.008, 0.006 |
| Building density | −0.118 | 0.0075 | −0.219, −0.015 | −0.219 | 0.0001 | −0.345, 0.060 |
| Pond density | −0.389 | 0.0703 | −0.930, 0.472 | 0.008 | 0.6635 | −0.070, 0.142 |