GS101 Lecture Notes - Primary Production, Malthusian Trap, Keystone Species

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28 Feb 2013
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The ill fated mistake of the malthusian trap. Britain showed this was wrong, as they escaped from this trap. Fuelling the chinese miracle fueled by coal/oil (like britain and america) A day in your life without oil issue of life without fossil fuels goes beyond automobiles/transportation. Species extinction: 6th great species extinction in planetary history. Caused by us, whereas, the ones before were caused by asteroids. Natural rate of extinction: 1 - 5 species per year. Estimated 30,000 species lost per year largely caused by things such as deforestation (cutting down forests in biologically rich areas, such as amazons: rise of human population correlated with rise of animal extinction. Diversity and productivity (keystone species and net primary productivity: keystone species are species that are essential to the functioning of an entire ecosystem. However, don"t know which species are keystone species until the they area gone. Overfishing: 80-85% of world"s fisheries are overexploited.

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