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IB ESS 4.4.6 Eutrophication sequence

IB ESS 4.4.6 Eutrophication sequence
IB Environmental Systems and Societies syllabusESS SL/HLFirst assessment 2026

Practise sequencing how nutrient enrichment changes aquatic systems, from algal growth to oxygen depletion and ecological disruption.

How this is tested

  • explain the eutrophication sequence from nutrient input to algal bloom and oxygen loss
  • predict aquatic system impacts when decomposition increases and dissolved oxygen falls
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