Fig. 2. Taxonomic Diversity (Species Richness; a), Functional Diversity (Functional Divergence, Functional Evenness; b-c) and Phylogenetic Diversity (MPD; d) of communities. Inv = bird communities invaded by alien species (purple). InvNoalien = bird communities invaded by alien species accounting only for native species (orange). Notinv = non-invaded bird communities (green). Shared letters indicate no significant difference; different letters indicate significant difference. Points represents the average estimate values, lines are the range of the 95% CI. For metric description, see Table 1.