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Table 1 Correlations among approaches to measure light availability in the understorey

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

 

Transmittance

Canopy cover

Openness

Crown projection

Transmittance

–

− 0.56

0.61

− 0.38

Canopy cover

− 0.54

–

− 0.66

0.42

Openness

0.66

− 0.59

–

− 0.33

Crown projection

− 0.15

0.34

− 0.20

–

  1. Upper triangle of the correlation matrix are Spearman’s correlation coefficients, lower Pearson’s. Sstatistically significant (p < 0.05) correlations are printed in italic