Standard Science Primary 6 Interactions

Study the food web: Algae → Small Fish → Large Fish → Shark. What will happen to the Algae population if the number of Large Fish decreases?

A The Algae population will increase.
B The Algae population will decrease.
C The Algae population will remain the same.
D The Algae will become consumers.
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Worked Solution

Step 1: Fewer Large Fish mean fewer predators for Small Fish. Step [2-9]: The Small Fish population will increase. Step [2-9]: More Small Fish will eat more Algae, causing the Algae population to decrease.

Correct answer: The Algae population will decrease.

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