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Table 4 Model results for functional diversity (Rao’s Q). Approximate significance of the intercept, any parametric terms and the smooth terms for single variables and tensor product smooth terms for interactions

From: Nitrogen deposition causes eutrophication in bryophyte communities in central and northern European forests

 

RaoQ

Predictors

edf

Chi.sq

p

Smooth term (NH4, NO3)

0.85

2.15

0.07

Smooth term (canopy)

2.80

39.90

< 0.001

Smooth term (precipitation)

0.11

0.13

0.25

Smooth term (age)

0.00

0.00

0.41

Smooth term (pH)

0.00

0.00

0.82

Tensor product smooth term (longitude, latitude, year)

34.4

378.1

< 0.001

Parametric coefficient

   
 

Estimate

Std. error

z-value

p

Intercept

0.076

0.0023

32.28

< 0.001

Fixed effect (forest type)

−0.018

0.0031

−6.00

< 0.001

Deviance explained = 47.4%