4.4 - Abiotic & Biotic Factors

• What are biotic factors?

  Living factors affecting organisms or ecosystems
• How does predation qualify as a biotic factor?

  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 temperature affect photosynthesis?

  Higher temperatures increase enzyme activity
• What happens to animals when temperature increases?

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

  Identifying factors and explaining their changes
• What biotic factors affect a clownfish?

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

  Water temperature and oxygen concentration
• How do abiotic factors indirectly affect clownfish?

  They influence other species like sea anemones
• 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
• What impact does an increase in temperature have on plant growth?

  • Increases rate of photosynthesis
  • Enhances enzyme activity
  • Allows animals to use energy for growth
• How do biotic and abiotic factors interact in an ecosystem?

  • Biotic factors can be influenced by abiotic factors
  • Changes in abiotic factors affect living organisms
  • Living organisms can modify abiotic conditions