Fig. 6 in The biogeography of non-marine molluscs in the Tuscan Archipelago reveals combined effects of current eco-geographical drivers and paleogeography

Fig. 6 Cluster analysis (a) and non-metric multidimensional scaling (NMDS) in RGB (red, green, and blue) color space (b) for Simpson index (βsimp) showing relationships between Tuscan Archipelago islands and their source pool (Tuscany/Sardo-Corsican complex) considering species of biogeographical interest (SC, Sardo-Corsican species; T, Tuscan species). In cluster analysis, multiscale bootstrap procedure resulted in two different values for each node: on the left,