HomeIB ESSTopic 2.5

Zonation, succession and change in ecosystems

Topic 2.5 examines how energy and matter cycle through ecosystems, including concepts of gross and net primary productivity, energy efficiency ratios, and nutrient cycling. Students learn to calculate energy transfers between trophic levels and evaluate productivity data.

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IB ESS · Topic 2.5

Sub-topics in Topic 2.5

2.5.1Zonation2.5.2Transects along a gradient2.5.3Succession2.5.4Seral stages change conditions2.5.5Primary succession2.5.6Secondary succession2.5.7Changes during succession2.5.8Resilience and disturbance