Required Practical: Ecosystems (AQA GCSE Biology: Combined Science)

• Aim: To measure the population size of a common species in a habitat and use sampling techniques to investigate the effect of a factor on the distribution of this species
• You will:
  • Use a quadrat to estimate the population size of a plant species in a survey area
  • Use a transect line and a quadrat to investigate the effect of a factor on the number of plants in a survey area

Measuring the population size of a common species in a habitat

How to estimate the population size of a plant species in a survey area

Investigating the effect of a factor on the distribution of this species

How to investigate the effect of a factor on the number of plants in a survey area