ENV221H1 Lecture Notes - Lecture 18: Chestnut Blight, Invasive Species, Living Planet Index
Document Summary
Look through e-brochure and identify which species you"re most likely and least likely to save and explain why. Natural causes of extinction fossil record suggest more than 99% of all species ever in existence are now extinct: most went extinct before humans arrived. End of cretaceous dinosaurs and 50% of existing genera disappeared. Iucn red list of endangered species international union for conservation of nature and natural resources list of species facing high risk of extinction. 2014 list identifies as threatened with extinction: 26% of mammal species, 13% of bird species, 41% of amphibian species. Overtime, negative slope means the chance of survival for a species is less. Corals have the steepest negative slope, meaning their chance of survival today is drastically reduced. A metric developed by the world wildlife fund and the un environment. Quantifies the status of populations of animals. Population in temperate zone is actually doing well.
