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 2.5 Zonation, succession and change in ecosystems
2.5A Zonation
2.5B Succession
2.5C Ecosystem resilience
2.5D Community and productivity in succession (HL)
2.5E Climax communities and plagioclimax (HL)
