Topic 1: Foundation
Topic 2: Ecology
2.1 Individuals, populations, communities and ecosystems
2.2 Energy and biomass in ecosystems
2.3 Biogeochemical cycles
2.4 Climate and biomes
2.5 Zonation, succession and change in ecosystems
Topic 3: Conservation and biodiversity
Topic 4: Water
Topic 5: Land
Topic 6: Atmosphere and climate change
Topic 7: Natural resources
Topic 8: Human populations and urban systems
HL lenses
View a summary cheatsheet for 2.1 Individuals, populations, communities and ecosystems
2.1A Organisms
2.1B Population
2.1C Ecological Niche and Population Interactions
2.1D Carrying capacity
2.1E Population size and growth
2.1F Population abundance estimation
2.1G Community
2.1H Habitat
2.1I Ecosystems
2.1J Keystone species
2.1K Planetary boundaries model and biosphere integrity
2.1L Classification methods (HL)
2.1M Niche (HL)
2.1N r- and K strategists (HL)
2.1O Knowledge of species' classification (HL)
