BIOL208 Lecture Notes - Biocon, Keystone Species, Alpha Diversity
9 Apr 2014
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Biol 208 (april 4, 2014: preserve ecosystem usually if there is economic gain, accumulation of diversity and extinction, mass extinction graph. *occasionally, you will see large drops in this pattern mass extinctions (loss of 75% biodiversity: prediction of 6th mass extinction. Will take about 2500 years at the rate it has occurred in the past. *it takes a very long time for extinction to occur: if a tree lives 500 years, it will take a very long time before they go extinct. , ecosystem services: what do we get, supporting. Water purification: cultural, potential mechanisms linking biodiversity and ecosystem function, *complementarity. 2 species there will be a little competition but they are different and will probably exploit the environment more so than just one species they grow better than on own . *good argument for the preservation of diversity: *facilitation. *greater ecosystem services with higher diversity: *sampling effect.
