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What is the normal background rate of species extinction?
How high are extinction rates?
How many times higher are extinction rates than natural background rates?
How many times has humanity increased species extinction rates?
Jan 11, 2012 · Background extinction is a multi-generational, devolutionary process and accounts for the vast majority of all extinctions. Extinctions may occur anywhere along this continuum; however, all extinctions beyond catastrophe require some degree of devolutionary process.
- Delbert Wiens, Michèle R. Slaton
- 2012
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.
Feb 11, 2014 · extinction rates are 1,000 times higher than natural background rates of extinction and future rates are likely to be 10,000 times higher. Keywords: diversification rates, extinction rate, fossil record, lineages through time, molecular phylogenies
The normal rate of extinction of species, which reflects changes in local environmental conditions, in the absence of human influences. See also mass extinction. From: background extinction in A Dictionary of Environment and Conservation »
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).
Aug 26, 2014 · Abstract and Figures. A key measure of humanity's global impact is by how much it has increased species extinction rates. Familiar statements are that these are 100-1000 times pre-human or...
Aug 26, 2014 · A key measure of humanity's global impact is by how much it has increased species extinction rates. Familiar statements are that these are 100–1000 times pre-human or background extinction levels. Estimating recent rates is straightforward, but establishing a background rate for comparison is not.
