Population size

• What are the abiotic factors that affect population size?

  • Temperature
  • Light
  • pH
  • Humidity
• How does temperature affect population size?

  If temperatures are below optimum enzymes work slower so metabolic rate is reduced

  This reduces the carrying capacity of a population
• How does light affect population size?

  Rate of photosynthesis increases a light intensity increased

  Carrying capacity is increased with an increase in light
• How does pH affect population size?

  If pH deviates from the optimum, the enzymes will work less efficiently

  This reduces carrying capacity
• How does humidity affect population size?

  Those in very dry or humid areas are adapted to living in these conditions