Fig. 6
From: Tree growth is more limited by drought in rear-edge forests most of the times
Correlations between mean site series of ring-width indices and the SPEI drought index calculated at 1- to 48-month temporal resolution (x axes) and from January to December (y axes). Northern, intermediate and southern populations are represented for the six species (a, Pinus uncinata; b, Abies alba; c, Fagus sylvatica; d, Pinus sylvestris; e, Quercus robur; f, Quercus petraea). The colour scale shows the Pearson correlations