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Table 2 ANOVA table of the effects of region and light availability on understorey plant species richness

From: Plant species richness increases with light availability, but not variability, in temperate forests understorey

 

Effect

DF

SS

F

Transmittance

Region

2

6133

13.5***

Light

1

3812

16.8***

Region × light

2

837

0.166

Residuals

68

15,657

R2adj=0.36

Canopy cover

Region

2

5734

18.3***

Light

1

6791

43.4***

Region × light

2

2039

6.52**

Residuals

68

10,641

R2adj=0.55

Openness

Region

2

5955

17.2***

Light

1

6665

38.6***

Region × light

2

1778

5.15**

Residuals

68

11,852

R2adj=0.52

Crown projection

Region

2

5954

10.0***

Light

1

6

0.0203

Region × light

2

23

0.402

Residuals

68

20,165

R2adj=0.17

  1. Significant effects are indicated by asterisks behind F-values (*** and ** indicated P < 0.001 and 0.01, respectively). Model fit is indicated by adjusted R2. Total sum of squares is the same for all models (26,148), and effects are thus directly comparable across models