01:119:115 Lecture Notes - Lecture 28: Habitat Destruction, Minimum Viable Population, Effective Population Size
28 Jan 2018
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Document Summary
Variety of species in an ecosystem or across biosphere. Endangered species in danger of extinction throughout all or significant portion of its range. Ex: us ~25% of pharmacy prescriptions --> derived from plants. Ecosystem services all processes thr4ough which natural ecosystems help sustain human life air + h2o purification waste decomposition reduce impact of extreme weather + flooding crop pollination. Accidental / intentional movement by humans of species from nature locations to new geographic locations. Native habitat - species population is linked by predators, parasites, + pathogens. Overharvesting harvesting of wild organisms at rates exceeding ability of population to rebound. Species at most risk - restricted habitats, low reproductive rate. Ex: fig 54. 14 - chickens genetic variation declined. Focuses on populations in downward trend even if not yet at mvp. Need low undergrowth of plants around pine trees. Linked by exchanges of e matter + organisms.
