Human Population Growth - PowerPoint PPT Presentation

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  1. Human Population Growth Mrs. Sandy Gomez

  2. Human Population Growth • Human population has been growing almost exponentially for almost three centuries • No other population of large organisms has shown such growth for so long

  3. Human Population Growth • But no population can grow indefinitely • Human population must eventually either level off or decline

  4. Human Population Growth • This reduction in population growth will occur because of decreased birth rates or massive mortality

  5. Human Population Growth • Demographic Transition: Refers to the transition from high birth and death rates to low birth and death rates.

  6. Human Population Growth

  7. Human Population Growth

  8. Human Population Growth

  9. Human Population Growth

  10. Human Population Growth • Age Structure Pyramid • Also called an age picture diagram • Is a graphical illustration that shows the distribution of various age groups in a population

  11. Human Population Growth • Types of Age Structure Pyramids • Stable pyramid • Stationary pyramid • Expansive pyramid • Constrictive pyramid

  12. Human Population Growth • Expansive pyramid • A population pyramid that is very wide at the base, indicating high birth and death rates.

  13. Human Population Growth

  14. Human Population Growth • Stationary pyramid • A population pyramid typical of countries with low fertility and low mortality, very similar to a constrictive pyramid.

  15. Human Population Growth • Constrictive pyramid • A population pyramid that comes in at the bottom. 

  16. Human Population Growth

  17. Thanks for your attention!