BIO 3115 Lecture Notes - Lecture 8: Zygosity, Background Extinction Rate
3 Feb 2017
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Document Summary
In this study they went back and estimated from the fossil record the background extinction rate that is non-anthropogenic, and fast forwarded and compared it to the known extinctions from described species. Background extinction rate projected over current time scale. A dramatic increase for mammals and birds: partially due to increased knowledge about them. A major upswing that started 150 years ago. The amount of time that it would have taken to get to the extinction rates that we are now, if the background rate of extinction had been maintained. Percent extinction risks from climate change for 131 studies. Percent extinction risk refers to the predicted percent of species extinction in each study, averaged across all model assumptions. Predicted extinction risks from climate change accelerate with global temperature rise. At a conservation level climate change is almost impossible to mitigate. Predicted extinction risks from climate change differ by region.
