International A Level Biology / Ecology
Core practical 11: transects and abiotic measurements revision notes
Edexcel International A Level Biology (YBI11), chapter 15: Ecology, specification point 5.14. Part of the full course.
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Transects show how species change across a habitat when conditions vary from one place to another. Measuring abiotic factors alongside species abundance helps you explore how non-living conditions are linked to their distribution.
More lessons in Ecology
- Population, community, habitat and ecosystem
- Succession: from colonisation to climax
- Abiotic factors and population size
- Biotic factors: predation, competition and disease
- How the niche explains distribution and abundance
- Core practical 11: random sampling with quadrats
- Null hypotheses and choosing a statistical test
- Spearman's rank correlation coefficient
- Student's t-test
- The chi-squared test