10.19.2010 envs 100 lecture

10.19.2010 envs 100 lecture - 10/19 ultimate, proximate...

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10/19 ultimate, proximate drivers Edward o’ Wilson: totality of inherited variations of all forms of life across all levels of variation from ecosystem to species to gene Biodiversity is NOT: number of species (species richness), ecological processes, ecological functions, ecosystem services, common/useful qualifier: “native” as in “native biodiversity” Conservation value goes up as going up hierarchy Kingdom, phylum, class, order, family, genus, speices Species in the world: 1.5 species described, discover rate: 300 new species/day, 5-15 million eukaryotes Global diversity is unenvely distributed: 1) low latitudes: regional diversity and site level diversity are largest in tropics 2) islands: endemism: proportion of taxa in a specified geographic area that is found no where else 3) hot spots only 2-3% of species that ever existed still exists today. ~10 million years until extinctions occur with species. Extinction: natural, rates has gone up since before size: vulnerable to extinction (human destruction)
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10.19.2010 envs 100 lecture - 10/19 ultimate, proximate...

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