Appendix A. Significance of ecological thresholds in newt species, evaluated after removing from the data set ponds with fish.
Occurrence |
Breaking point |
Piecewise regression |
||
|
supF (n = 10) |
P |
F 7,1 |
P |
Distance to forest |
||||
T. alpestris |
17.840 |
0.0019 |
6.206 |
0.042 |
T. helveticus |
87.121 |
< 0.0001 |
65.216 |
<0.0001 |
T. vulgaris |
5.051 |
0.374 |
4.251 |
0.071 |
Forest percentage |
||||
T. alpestris |
14.519 |
0.008 |
0.350 |
0.573 |
T. helveticus |
23.672 |
0.0001 |
21.358 |
0.002 |
T. vulgaris |
11.709 |
0.027 |
< 0.001 |
0.996 |
Crop percentage |
||||
T. alpestris |
1.111 |
0.999 |
1.257 |
0.299 |
T. helveticus |
33.058 |
< 0.0001 |
23.708 |
0.002 |
T. vulgaris |
1.047 |
0.999 |
0.095 |
0.767 |