IGCSE Biology Notes: Ecology & Environment
IGCSE biology notes on ecology should include food web rules, carbon/nitrogen cycle summaries, and population keywords (community, ecosystem, niche).
Hub: IGCSE biology notes · Organisms & environment · Nutrient cycles · Conservation.
Ecology note blocks
| Block | Content |
|---|---|
| Terms | Producer, consumer, decomposer, trophic level |
| Pyramids | Biomass vs numbers — when each used |
| Cycles | Carbon: photosynthesis, respiration, combustion |
| Human impact | Deforestation, pollution, greenhouse effect bullets |
Skills
Practice interpreting population graphs from past papers — add one example to notes.
Frequently asked questions
Food chain vs web?
Notes: web shows multiple feeding relationships.
Sampling methods?
Quadrat/transect summary if required for Paper 6 — practical tips.
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