Key Question Why Does Population Composition Matter? © 2012 John Wiley & Sons, Inc. All rights reserved.

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Presentation transcript:

Key Question Why Does Population Composition Matter? © 2012 John Wiley & Sons, Inc. All rights reserved.

Population Composition The composition is the structure of a population in terms of age, sex, and other properties such as marital status and education. Age and sex are key indicators of population composition, and demographers and geographers use population pyramids to represent these traits visually. © 2012 John Wiley & Sons, Inc. All rights reserved.

Population Composition (cont’d) Young vs. elderly in any population will determine different social needs Geographers are concerned with both spatial distribution and population composition © 2012 John Wiley & Sons, Inc. All rights reserved.

Figure 2.16 Age–Sex Population Pyramids for Countries with High Population Growth Rates. Countries with high total fertility rates, high infant mortality rates and low life expectancies will have population pyramids with wide bases and narrow tops. Figure 2.17 Age–Sex Population Pyramids for Countries with Low Population Growth Rates. Countries with lower total fertility rates and longer life expectancies have population pyramids shaped more uniformly throughout. © 2012 John Wiley & Sons, Inc. All rights reserved. Data from: UN, World Population Prospects

Key Question How Does the Geography of Health Influence Population Dynamics? © 2012 John Wiley & Sons, Inc. All rights reserved.

Geographies of Health Infant Mortality Child Mortality Life Expectancy © 2012 John Wiley & Sons, Inc. All rights reserved.

Influence on Health and Well-Being Health is closely related to location and environment When an outbreak of a particular disease occurs its source and diffusion are studied by specialists in medical geography Medical geographers study diseases, and they also use locational analysis to predict diffusion and prescribe prevention strategies © 2012 John Wiley & Sons, Inc. All rights reserved.

Infectious Diseases 65% of all diseases are infectious Malaria - Vectored HIV/AIDS- Nonvectored © 2012 John Wiley & Sons, Inc. All rights reserved.

Chronic and Genetic Diseases Also called degenerative diseases Afflict middle and old age populations 100 years ago in the United States: tuberculosis, pneumonia, and heart diseases Today: Cancer, heart disease, stroke and accidents are the leading causes of death in the United States © 2012 John Wiley & Sons, Inc. All rights reserved.

Key Question How Do Governments Affect Population Change? © 2012 John Wiley & Sons, Inc. All rights reserved.

Population and Government Expansive population policies : Encourage large families and raise the rate of natural increase Eugenic population policies: D esigned to favor one racial or cultural sector of the population over others © 2012 John Wiley & Sons, Inc. All rights reserved.

Population and Government (cont’d) Restrictive population policies e.g., One-Child Policy in China – Limitations: Sweden – Contradictions: Roman Catholic doctrine Chengdu, China © 2012 John Wiley & Sons, Inc. All rights reserved. © H.J. de Blij

© 2012 John Wiley & Sons, Inc. All rights reserved. Data from: Population Reference Bureau

Additional Resources 200 Countries, 200 Years, 4 Minutes © 2012 John Wiley & Sons, Inc. All rights reserved.