GCSE Biology - Biotic and Abiotic Factors #83

The video tutorial explores biotic and abiotic factors in ecosystems. Biotic factors include living elements like predation and competition, while abiotic factors encompass non-living elements such as temperature and light. The tutorial discusses how changes in these factors can impact ecosystems, using the clownfish and sea anemone as a case study to illustrate these concepts.

Which of the following is considered a biotic factor in an ecosystem?

• Predation

• Temperature

• Soil pH

• Light intensity

What is an example of an abiotic factor that can influence plant growth?

• Predation by herbivores

• Disease

• Competition for resources

• Temperature

How might an increase in temperature affect an ecosystem?

• Decrease in photosynthesis rate

• Increase in plant growth rate

• Higher energy expenditure for animals

• Reduced enzyme activity

In the clownfish example, which of the following is a biotic factor affecting the clownfish?

• Salt levels in water

• Oxygen concentration

• Water temperature

• Predation by bigger fish

Which abiotic factor might indirectly affect a clownfish by influencing its sea anemone habitat?

• Light intensity

• Competition for food

• Disease prevalence

• Predation by eels