Ch11 Population Growth and Regulation1.pdf

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University College Courses
Spencer Barrett

chapter 11: POPULATION GROWTH AND REGULATION  human pop. growth during the last 10 000 years has been one of the most significant ecological developments in earth’s history  food supply no longer limited survival and reproduction after the advent of agriculture  the Industrial Revolution brought improvements w/ public health and medicine and increasing material wealth  pop. doubled from 3 billion to 6 billion in only 40 years (1.7% growth per year)  further growth will stress the biosphere and lead to the continued degradation of many natural envmts  predicting future is difficult b/c many unknown possibilities  changes in technology, emergence of epidemic diseases of humans or their crops and livestock, and changes in material wealth, education, culture  concern for human pop. growth has led to  the develpmt of mathematical techniques to predict the growth of pop. (one aspect of demography [the study of populations]  and to intensive study of natural and laboratory pop. to learn about mechanism of pop. regulation  demography began in 17 century, London cloth merchant John GraunJohn Graunt  developed a variety of pop. statistics (probability of death at diff. ages – led to life insurance industry, and the rate of growth of the human pop.)  18 century, British economist ThomThomas Malthus  calculated that the human pop. would soon outstrip its food supply (this inspired Charles Darwin to develop his theory of evolution by n
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