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Brainlag Learn / GCSE Biology

Ecology

Communities and adaptations, sampling with quadrats, transects and capture-recapture, food chains and the carbon and water cycles, decay, biodiversity and human impact, biomass transfer and food security.

Lessons

  1. Communities, interdependence and adaptationsThe words ecologists use, abiotic and biotic factors, how species in a community depend on each other, and how adaptations suit organisms to where they live. 20 min, free
  2. Sampling with quadrats, transects and capture-recaptureRandom quadrats and percentage cover, scaling a quadrat count up to a whole field, belt transects, the field investigation required practical, and capture-recapture for animals that move. 25 min, free
  3. Food chains, cycles and decayProducers and consumers, predator and prey cycles, the carbon and water cycles, what speeds up decay, and the milk and lipase decay practical with rate = 1000 ÷ time (Biology only). 25 min, Plus
  4. Biodiversity and human impactWhy biodiversity matters, how pollution, land use, deforestation and peat burning reduce it, global warming, and the percentages and graphs used to measure the change. 20 min, Plus
  5. Trophic levels, pyramids and efficiencyTrophic levels, drawing pyramids of biomass to scale, why biomass is lost at each step, and calculating the efficiency of transfer (Biology only). 20 min, Plus, Biology only
  6. Food security and farmingWhat threatens food security, making food production more efficient, sustainable fishing and mycoprotein (Biology only). 20 min, Plus, Biology only

Practise and test

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