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Human Population

Human Population. Objectives. Calculate natural percentage population change Identify the types of expected growth from age structure diagrams Use the Demographic Transition Model to evaluate a countries level of development Describe solutions for population stability.

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Human Population

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  1. Human Population

  2. Objectives • Calculate natural percentage population change • Identify the types of expected growth from age structure diagrams • Use the Demographic Transition Model to evaluate a countries level of development • Describe solutions for population stability

  3. Current World Population: 6.6 billion The human population is now in an exponential part of a J-shaped growth curve. World population increases the equivalent of one medium-sized city (216,000) per day and 79 million per year. Calculate the doubling time for the world at the current growth rate. The world population may level off at 8, 10.5 or 14.2 billion. Why?

  4. Demography: the statistical study of a population • As of the census[2] of 2000, there were 58,974 people, 18,947 households, and 14,020 families residing in the city. The population density was 3,106.4/km² (8,045.8/mi²). There were 19,441 housing units at an average density of 1,024.0/km² (2,652.3/mi²). The racial makeup of the city was 63.00% White, 1.57% Black or African American, 0.96% Native American, 5.93% Asian, 0.22% Pacific Islander, 23.66% from other races, and 4.67% from two or more races. 49.04% of the population were Hispanic or Latino of any race. • There are 19,042 households out of which 39.3% had children under the age of 18 living with them, 54.5% were married couples living together, 13.5% had a female householder with no husband present, and 26.0% were non-families. 21.0% of all households were made up of individuals and 8.0% had someone living alone who was 65 years of age or older. The average household size was 3.08 and the average family size was 3.56. • In the city the population was spread out with 29.1% under the age of 18, 10.3% from 18 to 24, 31.7% from 25 to 44, 18.2% from 45 to 64, and 10.8% who were 65 years of age or older. The median age was 31 years. For every 100 females there were 97.1 males. For every 100 females age 18 and over, there were 94.7 males.

  5. Demography :the statistical study of a population Density Distribution Growth rate For a population i.e. La Habra Percent change = ( ) – ( ) For the World population change Crude birth rate = birth rate/1000 people Crude death rate = deaths/1000 people Percent change = birth rate – death rate x 100 1000 persons

  6. Demography :the statistical study of a population Density Distribution Growth rate For a population i.e. La Habra Percent change = (births + immigration) – (deaths + emigration) For the World population change Crude birth rate = birth rate/1000 people Crude death rate = deaths/1000 people Percent change = birth rate – death rate x 100 1000 persons

  7. Factors Affecting Population Size Fertility Rate: Replacement Level Fertility Total fertility rate Mortality rate

  8. Total Fertility Rate

  9. Education and Fertility Rates

  10. Mortality

  11. Social Security Women’s opportunities in the workforce Contraceptive Access Health Care Education Older Marital Age Old age security Lack of education Women’s status in society Lack of contraception Child mortality MDC vs. LDC

  12. Age Structure Diagrams Postreproductive Reproductive Prereproductive

  13. Growth Rate Designations • Rapid: 1.5 – 3% • Slow: 0.3 – 1.4% • Zero: 0 – 0.2% • Negative

  14. How does age structure affect population growth?

  15. World Demographics

  16. 99% of the next billion people added will be born in poor, less developed regions that are least able to support them 44% of Nigeria’s population is under age 15!

  17. Effects of Population Growth • Where will people live?

  18. Effects of Population Growth • Where will people live? • How will we feed, house and educate?

  19. Effects of Population Growth • Where will people live? • How will we feed, house and educate? • Will we have necessary resources?

  20. Effects of Population Growth • Where will people live? • How will we feed, house and educate? • Will we have necessary resources? • What will the impact on the environment be?

  21. Decreasing Growth

  22. Effects of Population Decline • Loss of work force

  23. Effects of Population Decline • Loss of work force • Loss of persons in reproductive range

  24. Effects of Population Decline • Loss of work force • Loss of persons in reproductive range • Loss of resources for aging population

  25. Population Stability • Demographic Transition Model

  26. Influencing Population Size The Cairo Conference 1997 • Empower women • Education • Health care • Increase economic opportunities

  27. Summary • Demography is the statistical study of

  28. Summary • Demography is the statistical study of populations • provide information for projecting population dynamics

  29. Summary • Demography is the statistical study of populations • Age structure diagrams provide information for projecting population dynamics • The worlds TFR is declining as population is

  30. Summary • Demography is the statistical study of populations • Age structure diagrams provide information for projecting population dynamics • The worlds TFR is declining as population is increasing • The majority of growth will occur in

  31. Summary • Demography is the statistical study of populations • Age structure diagrams provide information for projecting population dynamics • The worlds TFR is declining as population is increasing • The majority of growth will occur in LDC’s • A naturally occurring equilibrium is supported by the

  32. Summary • Demography is the statistical study of populations • Age structure diagrams provide information for projecting population dynamics • The worlds TFR is declining as population is increasing • The majority of growth will occur in LDC’s • A naturally occurring equilibrium is supported by the Demographic Transition Model • Education, economic stimulus, and empowerment of women are methods of influencing

  33. Summary • Demography is the statistical study of populations • Age structure diagrams provide information for projecting population dynamics • The worlds TFR is declining as population is increasing • The majority of growth will occur in LDC’s • A naturally occurring equilibrium is supported by the Demographic Transition Model • Education, economic stimulus, and empowerment of women are methods of influencing population size

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