BIO 227 Lecture Notes - Lecture 18: Carnivora, Invasive Species, Genetic Diversity
Document Summary
Mammalian herbivores: rabbits, goats, sheep, pigs, etc: rats preying on nest of native new zealand bird. Ag studies, removal of balis water: early detection. Bleach to remove algae in marine area: control and management. Rules for managing and eradicating a species. Removing the last 5% may take 50% of the time and cost. Disease can be devastating if it"s not native to population. Genetic diversity is most relevant to disease effects on wildlife. Potato infected with potato blight - fungus-like, from low diversity. 50-70% of crops infected several years in a row. Spread through biting, every infected dies (esp. from starvation) 70-75% population reduced since 1996, expected 100% loss in 20 years. Once most abundant tree now gone, disease from chinese chestnut. 71 birds extinct, 1/3 bird species endemic, exotic mosquitos feeding on native bird. Chytridiomycosis (fungus that hardens skin and prevents breathing) in frogs in sierra. Nevada, from african clawed frog, largest extinction event with a taxon.
