Fig. 3From: Tree growth is more limited by drought in rear-edge forests most of the timesMean series of ring-width indices (RWI) of the six species (a, Pinus uncinata; b, Abies alba; c, Fagus sylvatica; d, Pinus sylvestris; e, Quercus robur; f, Quercus petraea) studied in the northern (blue), intermediate (black) and southern (brown) tree populations for the period 1950–2006Back to article page