Appendix B. A figure and two tables showing results of the analysis of the Amazonian fern data:




A. tomentosum 
Very broad 
Broad 
Medium 
Fine 


R^{2} of PCNM submodel on A. tomentosum 





R^{2} of environment on submodel 




R^{2} of environment on A. tomentosum 







Elevation (m) 




Thickness of soil organic horizon (cm) 



Drainage 



Canopy height (m) 



Canopy coverage (%) 


Shrub coverage (%) 




Herb coverage (%) 


Trees 3–7.5 cm DBH 



Lianas 3–7.5 cm diameter 


Lianas 8–15 cm diameter 



Table B2. R^{2} and probabilities related to the spatial analysis of the fern Adiantum tomentosum at Huanta (Peru). First line: R^{2} of each spatial submodel. Second line: R^{2} of the regression of the submodel (fitted values) on a subset of backwardselected environmental variables. Third line: product of the two previous lines, i.e., variation of the fern data explained by the environmental variables at the scale considered. Other lines: P values of the regression coefficients of the environmental variables in the model considered.



A. tomentosum 
Very broad 
Broad 
Medium 
Fine 



R^{2} of PCNM submodel on A. tomentosum 





R^{2} of environment on submodel 





R^{2} of environment on A. tomentosum 







Elevation (trend) 


Elevation (detrended) 




Thickness of soil organic horizon (cm) 



Drainage 




Canopy height (m) 



Trees 3–7.5 cm DBH 


Trees 31.5–62.5 cm DBH 


Trees > 63 cm DBH 


Lianas 8–15 cm diameter 



