Table S1 Table indicating for the 10 insular hotspots: their original extent (km2), the number of islands contained in each of them, the number of islands with elevation data and the percentage of area that studied islands covered in the hotspot.


Table S2 Number of endemic species of six different groups (i.e. plants, mammals, birds, reptiles, amphibians and fishes) in the 10 hotspots obtained from Mittermeier et al. (2004).


Table S3 Number of cells (one pixel = 0.22 km2) and endemic species that are potentially threatened by sea level rise among the hotspots.


Table S4 Partial losses of insular habitat in the 10 different hotspots. We classed the number of islands according to their potential percentage area inundated per island. We divided them into six different classes: islands that may be completely inundated (i.e. 100%), islands whose area may be inundated between 75 and 100%, between 75 and 50%, between 50 and 25%, between 25 and 0%, and islands that are safe from any inundation.

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