a13 population (1.4/5/6)

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  • Created by: phebez
  • Created on: 06-10-15 19:41
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  • COMPETITION
    • INTRASPECIFIC
      • individuals of the same species compete with one another for resourses
      • 2 species occupy the same niche
        • one will normally have a competitive advantage
          • pop. of this species gradually increases
            • this might cause a complete removal of one species
              • COMPETITIVE EXCLUSION PRINCIPLE
    • A13 POPULATION
      • HUMAN POPULATION
        • manufacturing+ trade = industrial revolution
        • agriculture
        • DEATH RATE
          • medical care
          • natural disasters
          • age profile
          • food supply
          • war
          • life expectancy at birth
          • safe drinking water+ effective sanitation
  • INTERSPECIFIC
    • individuals of different species compete for resourses
    • COMPETITION
      • INTRASPECIFIC
        • individuals of the same species compete with one another for resourses
        • 2 species occupy the same niche
          • one will normally have a competitive advantage
            • pop. of this species gradually increases
              • this might cause a complete removal of one species
                • COMPETITIVE EXCLUSION PRINCIPLE
      • A13 POPULATION
        • HUMAN POPULATION
          • manufacturing+ trade = industrial revolution
          • agriculture
          • DEATH RATE
            • medical care
            • natural disasters
            • age profile
            • food supply
            • war
            • life expectancy at birth
            • safe drinking water+ effective sanitation
  • factors organisims compete for
    • food, water, light ,breeding sites etc.
  • PREDETATION
    • occurs when one organism is consumed by another
    • population crashes create a selection pressure- only who survive can reproduce so the pop. evolves to be better adapted
  • predators eat their prey - educing prey population
    • fewer prey- predators are in greater competition
      • predator population reduced - not enough prey for survival
    • PREDETATION
      • occurs when one organism is consumed by another
      • population crashes create a selection pressure- only who survive can reproduce so the pop. evolves to be better adapted
  • prey population increases
    • more prey- predator population in turn increases
    • fewer predators- fewer prey are eaten
      • predator population reduced - not enough prey for survival
  • BIRTH RATE
    • economic
    • cultural+ religious background
    • birth control
    • social pressure and conditions
    • political factors
  • SURVIVAL CURVE IS THE % OF A POP. STILL ALIVE AFTER A PARTICULAR EVENT
  • THE AVERAGE LIFE EXPECTANCY IS THE STAGE AT WHICH 50% OF THE INDIVIDUALS IN A PARTICULAR POP. ARE STILL ALIVE

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