Human Population

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Human Population
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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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• 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?

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Demography the statistical study of a
population

• As of the census2 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.

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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

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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

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Factors Affecting Population Size

• Fertility Rate
• Replacement Level Fertility
• Total fertility rate
• Mortality rate

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Total Fertility Rate
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Education and Fertility Rates
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Mortality
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MDC vs. LDC

• Social Security
• Womens opportunities in the workforce
• Contraceptive Access
• Health Care
• Education
• Older Marital Age

• Old age security
• Lack of education
• Womens status in society
• Lack of contraception
• Child mortality

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Age Structure Diagrams

Postreproductive
Reproductive Prereproductive
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Growth Rate Designations

• Rapid 1.5 3
• Slow 0.3 1.4
• Zero 0 0.2
• Negative

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How does age structure affect population growth?
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World Demographics
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99 of the next billion people added will be born
in poor, less developed regions that are least
able to support them 44 of Nigerias population
is under age 15!
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Effects of Population Growth

• Where will people live?

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Effects of Population Growth

• Where will people live?
• How will we feed, house and educate?

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Effects of Population Growth

• Where will people live?
• How will we feed, house and educate?
• Will we have necessary resources?

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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?

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Decreasing Growth
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Effects of Population Decline

• Loss of work force

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Effects of Population Decline

• Loss of work force
• Loss of persons in reproductive range

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Effects of Population Decline

• Loss of work force
• Loss of persons in reproductive range
• Loss of resources for aging population

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Population Stability

• Demographic Transition Model

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Influencing Population Size

• The Cairo Conference 1997
• Empower women
• Education
• Health care
• Increase economic opportunities

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Summary

• Demography is the statistical study of

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Summary

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

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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

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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

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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 LDCs
• A naturally occurring equilibrium is supported
  by the

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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 LDCs
• A naturally occurring equilibrium is supported
  by the Demographic Transition Model
• Education, economic stimulus, and empowerment of
  women are methods of influencing

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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 LDCs
• 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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