Edexcel IGCSE Biology · Spec 4.2-4.5
Studying Ecosystems
How to study ecosystems using quadrats and transects to estimate the size of populations.
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Studying Ecosystems
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Spec 4.2-4.5
What you need to know
- Use quadrats to estimate population size
- Use transects to study distribution
- Recall abiotic and biotic factors
Active recall
Quick check
Answer each question before opening the answer.
What is a quadrat used for?
To estimate the abundance or distribution of organisms in an area.
How do you estimate a population size using quadrats?
Find the mean number per quadrat, then multiply by the total area (in quadrats).
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