SLR has been projected to impact the terrestrial biodiversity of low- lying islands and coastal regions via large habitat losses both directly  and indirectly  at even the 1-m scenario . However, these impacts vary depending on the islands' topographical differences. In a study of SLR impacts on insular biodiversity hotspots, Bellard et al.  reported that the Caribbean islands, Sundaland and the Philippines were projected to suffer the most habitat loss while the East Melanesian islands were projected to be less  affected. The most threatened of these, the Caribbean, was projected to have between 8.7% and 49.2% of its islands entirely submerged, respectively, from 1-m to 6-m SLR . However, many current projection studies consider marine flooding directly and seldom incorporate other indirect impacts such as increased habitat losses from horizontal erosion loss, increased salinity levels, tidal ranges and extreme events. These projections are considered to be conservative, underestimating the extent of habitat loss to terrestrial biodiversity .
IPCC
Climate Change 2022: Impacts, Adaptation and Vulnerability
IPCC Report