UCSF 137 Lecture Notes - Lecture 9: Agricultural Machinery, Coevolution, Organic Farming
11 May 2016
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Explain why forecasting human population growth is so challenging: unforeseen circumstances, modernization leads to decline in birth rate -- difficult to predict, affluence changes relationship to resources -- use more, complex relationship with resources as technology changes. Understand how affluence and technology along with population influence carrying capacity: what does it mean that we would need 5 earths to support the population if everyone lived who we do in america. A. 1. b) use: ipat equation land needed to grow food land/plants need to absorb co2 emissions due to energy. Identify adaptations of plants that make them ideal for cultivation and animals for domestication: plants. Flexible diet fast growth rate ability to breed in captivity calm disposition social: agricultural plants and animals co-evolved with animals. C. 2. mutualistic humans act as selective pressure to promote adaptation. Describe how agriculture has changed over the years: agricultural technology. A. 2. a) manual labor > animal labor > fossil fuels.
