Fig. 2 in The biogeography of non-marine molluscs in the Tuscan Archipelago reveals combined effects of current eco-geographical drivers and paleogeography

Fig. 2 Cluster analysis for the Sørensen index (βsor) (a all species; b without alien species), Simpson index (βsim) (c all species; d without alien species) and nestedness index (βnest) (e all species; f without alien species). Multiscale bootstrap analysis resulted in two different values for each node: on the left, node support involving the exact number of species in the original dataset; on the right, node support when more resampled species were used. Highly and weakly supported nodes are indicated in black and red, respectively. CAP, Capraia; ELB, Elba; GIA, Giannutri; GIG, Giglio; GOR, Gorgona; MCO, Montecristo; PIA, Pianosa; CER, Cerboli; PAL, Palmaiola; FDG, Formiche di Grosseto; ARG, Monte Argentario