Figure 3. A in Summary for policymakers of the global assessment report on biodiversity and ecosystem services - unedited advance version
Creators
- Díaz, Sandra
- Settele, Josef
- Brondízio, Eduardo
- Ngo, Hien T.
- Guèze, Maximilien
- Agard, John
- Arneth, Almut
- Balvanera, Patricia
- Brauman, Kate
- Butchart, Stuart
- Chan, Kai
- Garibaldi, Lucas
- Ichii, Kazuhito
- Liu, Jianguo
- Subramanian, Suneetha Mazhenchery
- Midgley, Guy
- Miloslavich, Patricia
- Molnár, Zsolt
- Obura, David
- Pfaff, Alexander
- Polasky, Stephen
- Purvis, Andy
- Razzaque, Jona
- Reyers, Belinda
- Roy, Rinku
- Shin, Yunne-Jai
- Hamakers, Ingrid Visseren-
- Willis, Katherine
- Zayas, Cynthia
Description
Figure 3. A substantial proportion of assessed species are threatened with extinction and overall trends are deteriorating, with extinction rates increasing sharply in the past century. (A) Percentage of species threatened with extinction in taxonomic groups that have been assessed comprehensively, or through a 'sampled' approach, or for which selected subsets have been assessed, by the International Union for Conservation of Nature (IUCN) Red List of Threatened Species. Groups are ordered according to the best estimate for the percentage of extant species considered threatened (shown by the vertical blue lines), assuming that data deficient species are as threatened as non-data deficient species. (B) Extinctions since 1500 for vertebrate groups. Rates for Reptiles and Fishes have not been assessed for all species. (C) Red List Index of species survival for taxonomic groups that have been assessed for the IUCN Red List at least twice. A value of 1 is equivalent to all species being categorized as Least Concern; a value of zero is equivalent to all species being classified as Extinct. Data for all panels derive from www.iucnredlist.org (see Chapter 3 Figure 3.4 and Chapter 2 Figure 2.7).
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