IB ESS 2.5.13 (HL) Plagioclimax
IB ESS 2.5.13 (HL) Plagioclimax

IB Environmental Systems and Societies syllabusESS SL/HLFirst assessment 2026
Practise explaining how human activities can divert succession into a maintained community rather than allowing a climatic climax to develop.
How this is tested
- explain how grazing or predator removal can hold succession at a plagioclimax
- link repeated human disturbance to a maintained community below climatic climax
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