Table 1.
Effects of treatments and their interactions on variables
| Species richness |
Ecosystem stability |
Ecosystem μ |
Ecosystem σ2 |
Asynchrony |
Evenness |
H′ |
|||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| d.f. | F | P | F | P | F | P | F | P | F | P | F | P | F | P | |
| N | 1355 | 216·4 | <0·001 | 75·5 | <0·001 | 1138·0 | <0·001 | 243·7 | <0·001 | 18·5 | <0·001 | 17·2 | <0·001 | 120·5 | <0·001 |
| F | 1355 | 3·5 | 0·064 | 3·7 | 0·056 | 0·3 | 0·594 | 2·9 | 0·088 | 2·3 | 0·133 | 0·6 | 0·426 | 2·1 | 0·145 |
| M | 1355 | 107·0 | <0·001 | 4·1 | 0·044 | 3·4 | 0·066 | 5·4 | 0·021 | 7·4 | 0·007 | 14·7 | <0·001 | 33·7 | <0·001 |
| F × M | 1355 | 1·7 | 0·196 | 0·2 | 0·686 | 1·6 | 0·209 | 0·4 | 0·510 | 0·1 | 0·805 | 0·8 | 0·386 | 0·3 | 0·606 |
Results of the two-way ANCOVA for the effects of the rate (N) and the frequency (F) of N addition, mowing (M), and their interactions on species richness, the temporal stability of ecosystem above-ground net primary productivity, ecosystem mean (μ), ecosystem variance (σ2), species asynchrony, evenness, and Shannon-diversity (H′), using the rate of N addition as a continuous variable. d.f., degrees of freedom. F- and P-values are given.