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IB ESS 2.5.6 Secondary succession

IB ESS 2.5.6 Secondary succession
IB Environmental Systems and Societies syllabusESS SL/HLFirst assessment 2026

Practise recognising secondary succession where soil remains and explaining why recovery after disturbance can proceed more rapidly.

How this is tested

  • distinguish secondary succession from primary succession using retained soil
  • explain recovery after fire or abandoned farming through surviving seeds and nutrients
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