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Population

Population. By: Olivia, Ryan, Jake and Julian. Key Issue 1. Where is the world’s population distributed?. Map of countries by total population. Population Concentration.

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Population

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  1. Population By: Olivia, Ryan, Jake and Julian

  2. Key Issue 1 • Where is the world’s population distributed? Map of countries by total population

  3. Population Concentration • 1\5 of the world’s population lives in East Asia, an area consisting of eastern China, Japan, Korea and Taiwan. 5\6 of the people in this area live in the people’s republic of China. The population here is extremely clustered.

  4. Key Issue 2 • Where has the world’s population increased? Annual population growth rate in percent

  5. Population Density • Arithmetic density is the number of people in a given area. • Physiologic density a ratio of human population to the area of cropland, used in less developed countries dominated by subsistence agriculture. • Agriculture density is the ratio of the number of farmers to the amount of arable land.

  6. Natural Increase • Crude birth rate (CBR)- The number of live births per year per 1,000 people • Crude death rate (CDR)- The number of deaths per year per 1,000 people • Natural Increase Rate (NIR)- Is the percentage by which a population grows in a year.

  7. Key Issue 3 • Why is population increasing at different rates in different countries? Annual population growth rate in percent

  8. Demographic Transition • The Demographic Transition model has 4 stages of population growth. • Stage 1 consists of a population that is technologically unadvanced, and as little to no population growth due to accompanying high death and birth rates.

  9. Demographic Transition (cont.) • Stage 2 involves lowered death rates due to a more stable food supply and the medical revolution, as was introduced during the industrial revolution. During stage 2 there is huge population growth due to the reduction of death rates well below the crude birth rate.

  10. Demographic Transition (cont.) • Stage 3 has a moderate amount of population growth, but during stage 3 the birth rates declines to eventually match that of the death rate, bringing it into Stage 4. Stage 3 is brought about by social changes, often a decision by the women to stop having as many kids.

  11. Demographic Transition (cont.) • Stage 4 occurs when the birth rate has declined to nearly match the death rate, and the population has zero population growth (ZPG).

  12. Population Pyramid Rapid growth

  13. Population Pyramid Slow growth

  14. Population Pyramid Negative growth http://geography.about.com/library/weekly/aa071497.htm

  15. Key Issue 4 • Why might the world face an overpopulation problem? http://www.census.gov/ipc/www/idb/worldpopgraph.php U.S. Census Bureau, international Data base

  16. Thomas Malthus • First to argue that the world’s rate of population increase was far outrunning the development of food supplies

  17. Neo Malthusians • Neo Malthusians believe that the Malthus theory applies to many different resources and make the argument that the gap between resources and population growth is, in fact, much wider in many LDC’s than Malthus predicted.

  18. Summary • Important facts to remember: • The Demographic Transition model is a very important model, and will be used throughout the year. • The Boserup Model is antithetical to the Malthus theory. • Know the criticisms to ALL of the models. • Population pyramids are important when it comes to the comparison of gender ratios and dependency ratios. They can tell a lot about a population, and are heavily related to the amount of development in an area.

  19. Articles • http://www.on-the-net.com/interskills/minis/popul.htm • http://www.nytimes.com/2007/06/28/world/28population.html?_r=1 • http://online.wsj.com/article/SB10001424052748703791504575078821926146904.html

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