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Paper 4Theory (Extended)4 marks
Eutrophication is a process affecting water bodies when excess nutrients enter the water.
Description
Eutrophication Process
Nitrate levels increase in a lake due to fertilizer runoff. This causes algae to grow rapidly. When the algae die, decomposers break down the dead algae using oxygen, reducing oxygen levels in the water. Fish in the lake begin to die due to lack of oxygen.
- a[4]
Explain how increased nitrate availability leads to the death of oxygen-dependent organisms in the lake.
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