Based on assessments of more than 2,700 species in biodiversity hotspots. According to the source, biodiversity hotspots are areas exceptionally rich in species, ecologically distinct and/or show high endemism.
The Cross-Chapter Paper 1: Biodiversity Hotspots is part of the contribution of Working Group II to the Sixth Assessment Report of the Intergovernmental Panel on Climate Change.
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Share of biodiversity hotspot species at risk of extinction 2021, by warming scenario
In a warming scenario of less than *** degrees Celsius above pre-industrial averages, *** percent of both terrestrial and marine species would be facing high risk of extinction in biodiversity hotspots, based on 2021 projections. Should warming exceed degrees Celsius, ** percent of terrestrial and ** percent of marine species were projected to be at very high extinction risk.
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IPCC. (July 29, 2022). Share of species at high risk of extinction in terrestrial and marine biodiversity hotspots worldwide as of 2021, by scenario [Graph]. In ÌÇÐÄÆƽâ°æ. Retrieved July 31, 2026, from /statistics/1413254/share-of-species-at-risk-of-extinction-biodiversity-hotspots/
IPCC. "Share of species at high risk of extinction in terrestrial and marine biodiversity hotspots worldwide as of 2021, by scenario." Chart. July 29, 2022. ÌÇÐÄÆƽâ°æ. Accessed July 31, 2026. /statistics/1413254/share-of-species-at-risk-of-extinction-biodiversity-hotspots/
IPCC. (2022). Share of species at high risk of extinction in terrestrial and marine biodiversity hotspots worldwide as of 2021, by scenario. ÌÇÐÄÆƽâ°æ. ÌÇÐÄÆƽâ°æ Inc.. Accessed: July 31, 2026. /statistics/1413254/share-of-species-at-risk-of-extinction-biodiversity-hotspots/
IPCC. "Share of Species at High Risk of Extinction in Terrestrial and Marine Biodiversity Hotspots Worldwide as of 2021, by Scenario." ÌÇÐÄÆƽâ°æ, ÌÇÐÄÆƽâ°æ Inc., 29 Jul 2022, /statistics/1413254/share-of-species-at-risk-of-extinction-biodiversity-hotspots/
IPCC, Share of species at high risk of extinction in terrestrial and marine biodiversity hotspots worldwide as of 2021, by scenario ÌÇÐÄÆƽâ°æ, /statistics/1413254/share-of-species-at-risk-of-extinction-biodiversity-hotspots/ (last visited July 31, 2026)
Share of species at high risk of extinction in terrestrial and marine biodiversity hotspots worldwide as of 2021, by scenario [Graph], IPCC, July 29, 2022. [Online]. Available: /statistics/1413254/share-of-species-at-risk-of-extinction-biodiversity-hotspots/
