Biotic and Abiotic Factors

• What are biotic factors?

  Living factors affecting organisms or ecosystems
• How can predation be classified in terms of biotic factors?

  It influences the population of another species
• What are abiotic factors?

  Non-living parts of the environment affecting organisms
• Which factors are included in abiotic factors?

  Light intensity, temperature, and moisture levels
• How does an increase in temperature affect photosynthesis?

  It increases the rate of photosynthesis
• What happens to animals when the temperature increases?

  They spend less energy staying warm
• What are typical exam questions about biotic and abiotic factors?

  Identifying factors and explaining changes
• What biotic factors affect a clownfish by its sea anemone?

  Predation, habitat competition, and disease
• What abiotic factors affect a clownfish?

  Water temperature and oxygen concentration
• How do light intensity and carbon dioxide concentration indirectly affect clownfish?

  They affect the sea anemone, impacting clownfish
• What are the main biotic and abiotic factors affecting ecosystems?

  Biotic factors:

  • Predation
  • Competition for resources
  • Disease
  • Food availability

  
  

  Abiotic factors:

  • Light intensity
  • Temperature
  • Carbon dioxide concentration
  • Moisture levels
  • Wind intensity and direction
  • Soil pH and mineral content
• How do changes in abiotic factors impact ecosystems?

  • Changes in temperature affect photosynthesis rates
  • Altered oxygen levels influence animal energy use
  • Variations in moisture levels impact plant growth