Fig. 4 in The biogeography of non-marine molluscs in the Tuscan Archipelago reveals combined effects of current eco-geographical drivers and paleogeography

Fig. 4 Non-metric multidimensional scaling (NMDS) in RGB (red, green, and blue) color space for Sørensen (βsor) (a), Simpson (βsim) (b), and nestedness indices (βnest) (c) showing land snail presence/ absence in the Tuscan Archipelago using the database of all species except aliens. 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