Appendix B. Results of nested ANOVAs testing for differences in soil and plant nutrients, stable isotopes, and dwarf shrub biomass. Island type tests for differences between fox-infested vs. fox-free islands. Island identity tests for differences between individual islands nested within island type.
df |
MS |
F |
P |
df |
MS |
F |
P |
|
Soil phosphorus |
1,16 |
3.0 |
7.3 |
0.01 |
16,887 |
0.41 |
33.9 |
0.0001 |
Soil nitrogen |
1,16 |
1.7 |
0.5 |
0.47 |
16,885 |
3.1 |
82.7 |
0.0001 |
% N grass |
1,16 |
60.1 |
11.5 |
0.004 |
16,406 |
5.2 |
15.2 |
0.0001 |
% N A. borealis |
1,13 |
16.2 |
12.1 |
0.004 |
13,182 |
1.3 |
4.0 |
0.0001 |
δ15N soil |
1,16 |
2244 |
16.3 |
0.001 |
16,629 |
137.8 |
15.3 |
0.0001 |
δ15N grass |
1,16 |
5477 |
23.7 |
0.0001 |
16,426 |
231 |
15.3 |
0.0001 |
δ15N A. borealis |
1,13 |
675 |
12.8 |
0.0001 |
13,182 |
52.6 |
4.6 |
0.0001 |
Dwarf shrub biomass |
1,15 |
1954 |
19.9 |
0.0001 |
15,422 |
97.8 |
2.4 |
0.002 |
Forb biomass |
1,15 |
281.6 |
2.7 |
0.12 |
15,418 |
104.7 |
1.5 |
0.092 |