Ecological Archives E094-059-A5

Peter C. le Roux, Jonathan Lenoir, Loïc Pellissier, Mary S. Wisz, Miska Luoto. 2013. Horizontal, but not vertical, biotic interactions affect fine-scale plant distribution patterns in a low-energy system. Ecology 94:671–682. http://dx.doi.org/10.1890/12-1482.1

Appendix E. Spearman rank correlation between species prevalence and the combined importance of vertical or horizontal biotic interactions.

Table E1. The correlation (as measured by the Spearman rank correlation) between species prevalence and the combined importance of vertical or horizontal biotic interactions, as calculated using generalized linear models (GLM), generalized additive models (GAM), and boosted regression trees (BRT).

 

 

Vertical interactions

 

Horizontal interactions

 

Technique

rs

p

 

rs

p

Species occurrence

 

 

 

 

 

GLM

-0.399

0.010

0.093

0.562

GAM

-0.283

0.073

0.233

0.142

BRT

-0.561

< 0.01

0.267

0.092

Species cover

GLM

-0.566

< 0.01

-0.033

0.839

GAM

-0.537

< 0.01

0.054

0.736

 

BRT

-0.365

0.019

 

0.177

0.267


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