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Unformatted text preview: Keystone species- one in which its presence or absence is a good indicaton of the enviroment Trophic levels-feeding status in relationship to food chain. Plants on bottom and then the things that eat the plants. Rarely have more than 6 trophic levels Primary producers- secondary consumers- tercerary producers Radiative evolution- galapegos finches species evolves into something new Climax community- when a species colounizes a area it changes the climate (a tree growing taller and producing shade and wind block change the enviroment) 2 nd law of thermodynamics- when u eat something it does not all go into you, so goes into heat, some u excrete and only about 10% of what u eat is turned into you the rest goes into the heat . There is a loss in energy quality. Sugar is high energy. Materials cycle through ecosystems Bio remediation- using organisms to help the enviroment. Mine waste, oil spills, there are organisms that can help this out Critical limits- for any species, a species can tolerate a range of things. For example a Critical limits- for any species, a species can tolerate a range of things....
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- Spring '08