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How high are extinction rates?
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The estimates of the background extinction rate described above derive from the abundant and widespread species that dominate the fossil record. By contrast, as the article later demonstrates, the species most likely to become extinct today are rare and local.
- Conservation - Secondary Extinctions | Britannica
Conservation - Secondary Extinctions: Once one species goes...
- Background extinction rate | biology | Britannica
The vast majority of species ever to have lived are extinct....
- Conservation - Secondary Extinctions | Britannica
Nov 21, 2023 · Estimates of Present-Time Extinction Rates. The background extinction rate is estimated to be about 1 extinction per million species each year (E/MSY). For example, if there are 8-11 million species in existence, then we would expect 8-11 of those species to become extinct in a year.
Jan 11, 2012 · If we consider background extinction as a biological process, a more precise definition is required. We define background extinction as a typically gradual (but sometimes also surprisingly rapid), multi-generational process of attritional, devolutionary population decline.
- Delbert Wiens, Michèle R. Slaton
- 2012
Aug 26, 2014 · On the basis of these results, we concluded that typical rates of background extinction may be closer to 0.1 E/MSY. Thus, current extinction rates are 1,000 times higher than natural background rates of extinction and future rates are likely to be 10,000 times higher. Estimación de la Tasa Normal de Extinción de Especies. Supporting Information.
- Jurriaan M. De Vos, Jurriaan M. De Vos, Lucas N. Joppa, John L. Gittleman, Patrick R. Stephens, Stua...
- 2015
Jan 22, 2024 · Predictions of species loss within the next century, a tiny amount of time on geological timescales, range from 10 percent to 50 percent. The five previous extinctions on this scale were caused by cataclysmic events that changed the course of the history of life in each instance.
Dec 21, 2021 · Unfortunately, we are currently losing species 1,000 times faster than natural background extinction rates (for mammals estimated to be 1.8 extinctions per 10,000 species per 100 years, Barnosky et al., 2011), and future rates may be 10,000 times higher that background rates (de Vos et al., 2015).
