AQA GCSE Biology

Revision Notes

7.2.2 Required Practical: Ecosystems

RP9: Investigating Ecosystems

  • 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

RP Ecosystems_ Estimating Population Size Method (1)_1, downloadable IGCSE & GCSE Biology revision notes

RP Ecosystems_ Estimating Population Size Method, downloadable IGCSE & GCSE Biology revision notes

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

RP Ecosystems_ Investigating the Effect of a Factor on the Distribution of a Species Method (1)_1, downloadable IGCSE & GCSE Biology revision notes

RP Ecosystems_ Investigating the Effect of a Factor on the Distribution of a Species Method (2)_1, downloadable IGCSE & GCSE Biology revision notes

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

Author: Jenna

Jenna studied at Cardiff University before training to become a science teacher at the University of Bath specialising in Biology (although she loves teaching all three sciences at GCSE level!). Teaching is her passion, and with 10 years experience teaching across a wide range of specifications – from GCSE and A Level Biology in the UK to IGCSE and IB Biology internationally – she knows what is required to pass those Biology exams.
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