Boxplots of unweighted community means of Ecological Indicator Values showing the results of the post-hoc Dunn’s multiple comparison test with Holm correction. The results of pairwise comparisons are indicated using Compact Letter Display method, where different letters between two clusters indicate a statistically significant difference of the test, with p <0.05. The colours refer to: red - Cluster 1 (Eastern Liguria); green - Cluster 2 (Central-Southern Tuscany and marginally Western Liguria); light blue - Cluster 3 (Southern Tuscany); purple - Cluster 4 (Eastern and Western Liguria).