CAS GE 100 Lecture Notes - Lecture 15: Gopher Tortoise, Habitat Destruction, Endangered Species Act Of 1973
15 May 2016
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Document Summary
Species diversity: species richness number of species in a given area, species evenness how evenly balanced are the abundances of each species. Insects are the most species rich on earth. Biodiversity total diversity and variability of living things. Environmental services: trees stabilize climate and regulate atmospheric temperature, biogeochemical cycling, more biodiversity means more pollination, pest control more diversity, more control, soils provide nutrients and water purification. Allopatric speciation geographical barriers that allow one species to adapt differently. Sympatric speciation new species arrives within parent species because they don"t interact much. Diversity is greatest at the equator along with net primary production and plant biomass. Theory of island biogeography macarthur and wilson found the number of lizard species vary positively with area of island. Biocentric view on the environment states animals should be able to live regardless whether they are useful to us.
