Standard Science Primary 6 Interactions

Study the food chain: Algae → Small Fish → Kingfisher. What would happen to the population of algae if the Kingfisher population increases suddenly?

A The algae population will increase.
B The algae population will remain the same.
C The small fish population will also increase.
D The algae population will decrease.
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Worked Solution

Step 1: More Kingfishers eat more small fish. Step [2-9]: The small fish population decreases. Step [2-9]: Fewer small fish mean less predation on algae, so the algae population increases.

Correct answer: The algae population will increase.

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