BIO220H1 Lecture Notes - Lecture 7: Big Area, Infant Mortality, Demographic Transition
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BIO220H1 Full Course Notes
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Focus on: effects on humans by natural processes, effects of humans on natural systems. Not just focusing on 1 species, try to focus on ecosystem-level perspective. Think about disproportionate effect of humans on environment: effect because of our numbers (huge population) and because of our technology (can manipulate natural systems) Carrying capacity for earth (can we apply it to humans?) Disproportionate effects of human impact: function of total population size and our per capita effect on natural ecosystems, need to think of both (number of humans + effect per individual human): Need to work on both sides to reduce the net. Image of mexico city: crowded, population > 25 million people, megacity, subway system transports 4. 5 million people per day. Questions: is this the natural tendency of all cities, what are the consequences for the earth if major metropolitan areas turn into megacities. Birth and immigration bring individuals into population. Death and out-migration lead to individuals leaving population.
