Human Population Growth

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

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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!