IB Environmental systems and societies Topic 2: Ecology Notes

Environmental systems and societies (ESS) Topic Topic 2: Ecology Revision Notes

Browse syllabus-aligned notes for Topic 2: Ecology. Open each subtopic for focused explanations, examples, and summaries.

Browse summary cheatsheets for Topic 2: Ecology

2.1 Individuals, populations, communities and ecosystems

15 subtopics

2.2 Energy and biomass in ecosystems

10 subtopics

2.3 Biogeochemical cycles

5 subtopics

2.4 Climate and biomes

6 subtopics

2.5 Zonation, succession and change in ecosystems

5 subtopics