Fig. 2
From: National scale variability in forest stand variables among regions of provenances in Spain
Biplots based on the upperstory and lowerstory data for the Fagaceae species. Green arrows represent the upperstory and lowerstory variables: number of adult trees per hectare (N), mean diameter of the adult trees (Dn), mean height of adult trees (H), basal area (G), number of seedlings per hectare (Nse), number of saplings per hectare (Nsa), shrub coverage (ShCov) and number of shrub species (Rshrub). Ellipses represent 95% confidence intervals around the centroids of the regions of provenance. The numbers in the centroids refer to the regions of provenance code (see Annexes 1 and 2)