Biodiversity hotspots are geographic areas with an exceptionally high richness of species, including rare and endemic species. Such hotspots have deep evolutionary roots and are concentrated in areas where past climatic variability was moderate . An important limitation of the biodiversity hotspot concept is that there may be species highly threatened with extinction that do not occur within what has traditionally been classified as a hotspot . Thus, biodiversity hotspot assessments need to be paralleled by assessments of highly endangered species, and the threats they face.
IPCC
Climate Change 2022: Impacts, Adaptation and Vulnerability
IPCC Report