7 Ecology
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Adaptations, interdependence and competition
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Abiotic factors
===============

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Biotic factors
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Adaptations
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Organisation of an ecosystem
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Levels of organisation
======================

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How materials are cycled
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Decomposition (biology only)
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Impact of environmental change (biology only and HT only)
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Biodiversity and the effect of human interaction on ecosystems
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Biodiversity
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Waste management
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Land use
========

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Deforestation
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Global warming
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Maintaining biodiversity
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Trophic levels in an ecosystem (biology only)
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Trophic levels
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Pyramids of biomass
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Transfer of biomass
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Food production (biology only)
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Factors affecting food security
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Farming techniques
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Sustainable fisheries
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Role of biotechnology
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