Table 1 Combined effects of grazing with drought or nitrogen addition on soil fauna feeding activity across different soil depths. Shown are the results of a cumulative link mixed model (clmm) for (A) a “drought model”, with severe “drought” (drought vs. ambient rainfall), “grazing” (grazed vs. rested)), “depth” (soil depth; 0–8 cm) and all possible interactions, and (B) a “nitrogen model”, with drought replaced by nitrogen addition effects. Both models have effective degrees of freedom of 10.
(A) Drought model | (B) Nitrogen model | ||||||
---|---|---|---|---|---|---|---|
Factor | z- value | p- value | Sign | Factor | z- value | p- value | Sign |
Grazing | 2.080 | 0.038 | ** | Grazing | 2.325 | 0.020 | ** |
Drought | 0.467 | 0.640 | Nitrogen | -0.041 | 0.968 | ||
Depth | 1.722 | 0.085 | * | Depth | 1.800 | 0.072 | * |
Grazing x Drought | -0.889 | 0.374 | Grazing x Nitrogen | -0.721 | 0.471 | ||
Drought x Depth | 0.416 | 0.678 | Nitrogen x Depth | -0.129 | 0.897 | ||
Grazing x Depth | -2.131 | 0.033 | ** | Grazing x Depth | -2.1958 | 0.028 | ** |
Grazing x Drought x Depth | -0.343 | 0.731 | Grazing x Nitrogen x Depth | 2.965 | 0.003 | ** |