IB Topic 3.1 Human Population Dynamics

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IB Topic 3.1 Human Population Dynamics
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Subtopics

• 3.1.1 Describe the nature and explain the
  implications of exponential growth in human
  populations.
• 3.1.2 Calculate and explain, from given data,
  the values of crude birth rate, crude death rate,
  fertility, doubling time and natural increase
  rate.
• 3.1.3 Analyze age/sex pyramids and diagrams
  showing demographic transition models.
• 3.1.4 Discuss the use of models in predicting
  the growth of human populations.

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3.1.1 Population Growth (Summary of how
ecosystems changeTBCh4)

• Exponential growth when organisms have enough
  food, water, and space optimal conditions. But,
• Limiting factors
• Density-dependent (usually biotic)
• Internal
• External
• Density-independent (usually abiotic)
• Carrying capacity (K) maximum number (or load)
  of individuals an environment can support
  SUSTAINABLY

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3.1.1 Vocabulary Terms

• Human Development Index (HDI)
• Is measure of well-being in a country
• ? Life expectancy
• ? Standards of living
• ? Education
• ? Per capita gross domestic product (GDP)
• MEDC More Economically Developed Countries
• Developed EU, North America, Japan, Israel,
  and others
• LEDC Less Economically Developed Countries
• Developing Most countries beyond above
  geographic boundaries

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3.1.2 Growth Calculations

• Crude Birth Rate (CBR) number of births
  (natality) per 1000 individuals per year (where p
  midyear popln, b and d of births and deaths
  per year.)
• Crude Death Rate (CDR) number of deaths
  (mortality) per 1000 individuals per year
• Natural Increase Rate (RNI) gives percentage
  growth (excluding migration)
• Doubling Time

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• General Fertility Rate (GFR) number of births per
  1000 women (15-49 yrs)
• Age-specific Birth Rate (ASBR) number of births
  per 1000 women (in a specific age group, in a
  geo. area)
• Total Fertility Rate (TFR) number of births per
  thousand women of childbearing age
• TFR (h x ? ASBR)/1000 Where hthe number of
  years in the age cohorts for the ASFR.
• Replacement Fertility Level enough babies to
  replace adults
• MEDC 2.03
• LEDC 2.16

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Calculating TFR from ASBR

• Age Specific Birth Rate
• total number of births 1000 women of any
  specified year group (s)

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3.1.1 Human Populations
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3.1.1 Human K

• Carrying capacity
• Technology
• Medicine
• Resource desire (dynamic)
• Resource needs
• urban vs. rural
• Wealth of population