Biology 2483A Lecture Notes - Lecture 22: Pacific Rim National Park Reserve, Baiji, Overexploitation
16 Dec 2017
School
Department
Course
Professor
Document Summary
Much research on extinction has focused on problems of small populations, which are vulnerable to genetic, demographic, and environmental stochasticity. We don"t quite understand why large populations are here one day, and gone the next: the reasons why extinction happens is still somewhat a mystery, biodiversity is declining globally. Estimates of current extinction rates rely on: the species-area relationship, changes in the threat status of species (ie. shift from endangered to critically endangered, rates of population decline or range contraction of common species. This is a crisis, we"re facing the 6th mass extinction. It"s sometimes difficult to know when a species is definitely extinct. Many species are known from a single specimen or location; the logistics of relocating them may be insurmountable. Often these species are amphibians, they are hard to see/find so they"re hard to study. The monteverde cloud forest preserve the golden toad"s previous habitat: scott gillinwater working with amphibians and reptiles in this area.
