Fig. 1
From: Alternative approaches to assessing the natural regeneration of Scots pine in a Mediterranean forest
NMDS ordination of the variables showing the centroids of the quartiles of the number of seedlings. Variables within Q4 hull are not shown to facilitate the visualization. Red ellipse and red hull Q4 (fourth quartile of the number of seedlings). Blue ellipse and blue hull Q123 (first, second and third quartiles of the number of seedlings). Yellow smooth surfaces IPOT gradient. Green surfaces Mg gradient