Fig. 3
From: Linking forest diversity and tree health: preliminary insights from a large-scale survey in Italy
Box and whisker plots of the main characteristics of the clusters of plots, identified by means of cluster analysis. The variable of plot included in the analysis were: altitude, latitude, MAI (Martonne Aridity Index*), basal area, Shannon Index, FD (Functional Divergence) for specific leaf area (SLA), percent of broadleaves (on basal area basis), and the severity of defoliation for each cluster. Mean value, quartiles, deviation standard and outliers are indicated. Data were normalized and standardized. *MAI = annual precipitation/(mean annual temperature + 10)