Table 4 Two-way ANOVA of the effect of forest type (natural versus planted), precipitation (Humid, Medium and Arid) and their interaction on vegetation cover (total and woody understory (UWV)) and diversity (richness and evenness) parameters
From: Vegetation structure of planted versus natural Aleppo pine stands along a climatic gradient in Spain
R 2 | Variable | SS | df | F | P | |
|---|---|---|---|---|---|---|
Total cover | 95.6 | Forest type | 42 815.0 | 1 | 288.7 | **** |
Precipitation | 3 717.0 | 2 | 12.5 | * | ||
Forest type × precipitation | 8 363.0 | 2 | 28.2 | **** | ||
Total richness | 74.5 | Forest type | 234.7 | 1 | 38.4 | **** |
Precipitation | 85.4 | 2 | 7.0 | * | ||
Forest type × precipitation | 14.8 | 2 | 1.2 | n.s. | ||
Total evenness | 42.5 | Forest type | 0.5 | 1 | 0.4 | n.s. |
Precipitation | 7.8 | 2 | 2.5 | n.s. | ||
Forest type × precipitation | 5.7 | 2 | 1.8 | n.s. | ||
UWV cover | 92.1 | Forest type | 21 636.2 | 1 | 178.9 | **** |
Precipitation | 157.0 | 2 | 0.6 | n.s. | ||
Forest type × precipitation | 2 820.3 | 2 | 11.7 | * | ||
UWV richness | 94.8 | Forest type | 288.0 | 1 | 304.9 | **** |
Precipitation | 4.3 | 2 | 2.3 | n.s. | ||
Forest type × precipitation | 6.3 | 2 | 3.4 | n.s. | ||
UWV evenness | 56.7 | Forest type | 6.7 | 1 | 2.8 | n.s. |
Precipitation | 9.3 | 2 | 1.9 | n.s. | ||
Forest type × precipitation | 21.8 | 2 | 3.6 | n.s. |