Table 7 Summary of analysis of variance (ANOVA) of the effects of harvesting intensity, species richness (a), species asynchrony (b) growth dominance coefficient (c), and the standing biomass after harvest (d) and the interactions between harvesting intensity and each predictor on the productivity stability. df, degrees of freedom; SS, sum of squares

(a)

 Species richness

1

0.610

4.452

0.038*

 Harvesting intensity

3

2.959

7.120

 < 0.001***

 Species richness × Harvesting intensity

3

0.633

5.540

0.029*

 Residuals

92

12.602

(b)

 Species asynchrony

1

1.932

13.631

 < 0.001***

 Harvesting intensity

3

1.784

4.195

0.008**

 Species asynchrony × Harvesting intensity

3

0.646

3.108

0.045*

 Residuals

92

13.042

(c)

 Growth dominance coefficient

1

5.263

50.622

 < 0.001***

 Harvesting intensity

3

1.177

3.774

0.013*

 Growth dominance coefficient × Harvesting intensity

3

1.017

1.338

0.067

 Residuals

87

9.045

(d)

 Standing biomass after harvest

1

5.843

58.329

 < 0.001***

 Harvesting intensity

3

2.002

7.354

 < 0.001***

 Standing biomass after harvest × Harvesting intensity

3

0.314

1.472

0.286

 Residuals

92

7.837