1 / 10

3.1.4 Models…

Note : The models of growth will be discussed later. Use this PPT to learn about Population Pyramids and stages of growth. . http://en.wikipedia.org/wiki/File:World-Population-1800-2100.png. 3.1.4 Models…. Model : a simplified structuring of reality Malthusian Boserup UN Statistics

elliot
Download Presentation

3.1.4 Models…

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  1. Note: The models of growth will be discussed later. Use this PPT to learn about Population Pyramids and stages of growth.

  2. http://en.wikipedia.org/wiki/File:World-Population-1800-2100.pnghttp://en.wikipedia.org/wiki/File:World-Population-1800-2100.png 3.1.4 Models… • Model: a simplified structuring of reality • Malthusian • Boserup • UN Statistics • U.S. Census Bureau • Age/Sex Pyramids • DTM • Only as good as the data inputted • Boundary conditions • Easier to understand • Useful for predictions

  3. http://www.fordham.edu/halsall/mod/lect/malthus.gif 3.1.1 Malthusian Theory • Thomas Malthus An Essay on the Principle of Population (1798) • Food is the limiting factor • Exponential population growth vs. arithmetic food growth • Refers to environmental limits • The Club of Rome (NGO) is neo-Malthusian • Limitations of Malthusian theory • Ignores the poor (most affected; likely distribution problems) • Agrarian technology – football pitch produces for 1000 people • Globalization – import/export

  4. http://upload.wikimedia.org/wikipedia/en/7/74/Graph_boserup.JPGhttp://upload.wikimedia.org/wikipedia/en/7/74/Graph_boserup.JPG 3.1.1 Boserup’s Theory • Esther Boserup, Danish economist (1965) • Increasing population → increasing food production (technology) • “necessity is the mother of invention” • Refers to cultural & tech issues • Limitations of Boserup’s theory • Like Malthus, infers “closed” system (immigration/emigration) • Globalization – import/export • Overpopulation can lead to unsustainable farming

  5. 3.1.3 Age/Sex Pyramids • Shows living individuals in different, 5-year cohorts (groups) in a country for a given year • Split into male/female • Population on x-axis, age groups on y-axis • Shape indicates stage of development in a country at a particular time. CHINA AUSTRALIA

  6. Retrieved on 03-11-2011 from: http://geographyfieldwork.com/Pop4.gif 3.1.3 Age/Sex Pyramids(cont’d)

  7. http://www.geogonline.org.uk/as_g2popdtm.htm 3.1.3 Demographic Transition Model

  8. http://en.wikipedia.org/wiki/File:DTM_Pyramids.svg Indicators in Development

  9. Retrieved 12-12-2012 from: http://upload.wikimedia.org/wikipedia/commons/thumb/1/11/World_population_(UN).svg/300px-World_population_(UN).svg.png 3.1.4 Predictions • BBC: 7 000 000 000 People

  10. 3.1.4 Predictions

More Related