Human population

• Calculation for doubling time?


  70/Percentage change
• What’s the calculations for population change?


  (CBR + 1) - (CDR + E)
• TFR

  Total Fertility Rate
• RFR

  replacement fertility rate
• Crude birth and death rate

  # of individuals born/dead per 1000 year
• Demographic momentum 


  Pop. increasing after TFR<RFR huge pre/reproductive individual
• Density dependent factor?


  Competition, predation, parasitism
• Density independent factor 


  Weather, climate, volcano
• Indicators of population health 


  Life expectancy and infant mortality
• Factors affecting birth rate

  • Need of children
  • Education of women
  • access to birth control
  • infant mortality rate
  • bearing first child
• Factors of death rate

  • availability of healthcare
  • availability of food
  • weather, floods
  • save water supplies
• importance of urbanization

  • provide family plan
  • access to birth control and abortion
  • providing education and work opportunities