Fig. 1.

Island species–area relationships (ISARs) and island functional diversity–area relationships (IFDARs) for Azorean spiders and beetles per island; n = 9 islands, except for the IFDAR endemics (n = 8), for which Corvo Island could not be included (SI Appendix, Table S2). FRic was computed based on six PCoA axes (81% total inertia) and seven PCoA axes (92%) for spiders and beetles, respectively. Dashed lines indicate nonsignificant regressions, all others being significant at P < 0.05 (see SI Appendix, Table S3 for details). Note that overplotting obscures some data points.