Fig. 2From: Climatic and anthropogenic factors explain the variability of Fagus sylvatica treeline elevation in fifteen mountain groups across the ApenninesDistribution of the maximum treeline elevation of Fagus sylvatica measured in all the mountain peaks (N = 224) of the 15 selected Apennine mountain groups. The top and bottom edges of the box are the 1st and 3rd quartiles, respectively; above and below bars indicate maximum and minimum values, respectively; the central line indicates the median value; green circles indicate the average valueBack to article page