Paper from Santos et al. published in Global Ecology and Biogeography

Santos, A.M.C., Whittaker, R.J., Triantis, K.A., Borges, P.A.V., Jones, O.R., Quicke, D. & Hortal, J. (2010). Are species-area relationships from entire archipelagos congruent with those of their constituent islands? Global Ecology and Biogeography, 19: 527-540.

Main conclusions:  Archipelagos, as a rule, follow the same ISAR as their constituent islands. Therefore, they can be used as distinct units themselves in largescale biogeographical and macroecological studies. Departure from the ISAR can be used as a crude indicator of richness-ordered nestedness, responsive to factors such as isolation, environmental heterogeneity, number and age of islands.