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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