SE Lecture Mon February 21

SE Lecture Mon - ◦ Age structure sex ratio ◦ And birth death immigration and emigration rates Population Distribution • Increased density

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Sustainable Environments 21 February 2011 Population growth affects the environment The IPAT model: I = P x A x T x S Out total impact (I) on the environment results from the interaction of population (P), affluence(a measure of consumption) (A) and technology (T), with an added sensitivity (S) factor Population = individuals need space and resources Affluence = greater per capita resource use Technology = increase exploitation of resources Sensitivity = how sensitive an environment is to human pressure Further model refinements include educations, laws, ethics, etc. Humanity use 1/3 of all the Earth's net primary production? Demography Demography = the application of population ecology to the study of humans – statistical change Demographers study population size, Density and distribution,
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Unformatted text preview: ◦ Age structure, sex ratio, ◦ And birth, death, immigration, and emigration rates Population Distribution • Increased density impacts the environment, but relieves pressure in less-populated areas • Humans are unevenly distributed around the globe ◦ Unpopulated areas tend to be environmentally sensitive (high S value in the IPAT equation) The demographic transition • Demographic transition = a model of economic and cultural change to explain the declining death and birth rates in industrializing nations • Stable preindustrial state of high birth and death rates change to a stable post-industrial state of low birth and death rates The demographic transition's four stages Population growth is seen as a temporary phenomenon...
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This note was uploaded on 03/22/2011 for the course GUS 0842 taught by Professor Neimark during the Spring '11 term at Temple.

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SE Lecture Mon - ◦ Age structure sex ratio ◦ And birth death immigration and emigration rates Population Distribution • Increased density

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