Lecture 24, Ch. 55

Lecture 24, Ch. 55 - Evolutionary / ecological view :...

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Lecture #24 Date ________ Chapter 55 ~ Conservation Biology
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Biodiversity crisis Extinction ~ natural phenomenon, however, rate is of concern…. . 50% loss of species when 90% of habitat is lost Major Threats: Habitat destruction ~ single greatest threat; cause of 73% of species designation as extinct, endangered, vulnerable, rare; 93% of coral reefs Competition by exotic (non- native) species ~ cause of 68% of species designation as extinct, endangered, vulnerable, rare; travel Overexploitation ~ commercial harvest or sport fishing; illegal trade
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Biodiversity: Human welfare 25% of all medical prescriptions Genetic variability Aesthetic and ethical reasons Species survival
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Conservation biology focus Preservationism : setting side select areas as natural and underdeveloped Resource conservation : public lands to meet the needs of agriculture and extractive industries, i.e., ”multiple use”
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Unformatted text preview: Evolutionary / ecological view : natural systems result from millions of years of evolution and ecosystem processes are necessary to maintain the biosphere Geographic distribution of biodiversity Energy availability ~ solar radiation Habitat heterogeneity ~ environmental patchiness Niche specialization ~ narrow resource range specialization Population interactions ~ complex population interactions Population & species level conservation Biodiversity hot spot : small area with an exceptional concentration of species Endemic species : species found nowhere else Endangered species : organism in danger of extinction Threatened species : likely to become endangered in the foreseeable future Bioremediation : use of living organisms to detoxify polluted systems La Fin El Extremo Das Ende L estremita The End...
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This note was uploaded on 09/22/2009 for the course BIOL BIOL 51 taught by Professor Janetkoprivnikar during the Spring '08 term at Pacific.

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Lecture 24, Ch. 55 - Evolutionary / ecological view :...

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