Select all the correct answers.In an aquatic ecosystem, the fishing of a particular fish species increased. This fish species is a secondary consumer in an energy pyramid. The fishing of the species led to a decrease in its population. In which two ways will this affect the food web? The higher levels in the pyramid will receive more energy. The higher levels in the pyramid will receive less energy. The lower levels in the pyramid will have less predation. The higher levels in the pyramid will receive no energy at all. The lower levels in the pyramid will receive less energy.
Question
Select all the correct answers.In an aquatic ecosystem, the fishing of a particular fish species increased. This fish species is a secondary consumer in an energy pyramid. The fishing of the species led to a decrease in its population. In which two ways will this affect the food web? The higher levels in the pyramid will receive more energy. The higher levels in the pyramid will receive less energy. The lower levels in the pyramid will have less predation. The higher levels in the pyramid will receive no energy at all. The lower levels in the pyramid will receive less energy.
Solution
The correct answers are: "The higher levels in the pyramid will receive less energy" and "The lower levels in the pyramid will have less predation."
Here's why:
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"The higher levels in the pyramid will receive less energy": This is correct because the secondary consumers (the fish species in this case) are being fished, which means their population is decreasing. This leads to less food (and therefore energy) available for the higher levels of the pyramid (tertiary consumers).
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"The lower levels in the pyramid will have less predation": This is also correct because with fewer secondary consumers (the fish), there will be less predation on the primary consumers and producers below them in the pyramid. This could lead to an increase in the population of these lower levels.
The other options are incorrect because:
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"The higher levels in the pyramid will receive more energy": This is incorrect because with fewer secondary consumers, there is less energy being transferred up the pyramid, not more.
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"The higher levels in the pyramid will receive no energy at all": This is incorrect because even though the population of the fish is decreasing, it's not completely gone, so some energy will still be transferred.
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"The lower levels in the pyramid will receive less energy": This is incorrect because energy in a food web flows upwards, not downwards. The lower levels of the pyramid (producers and primary consumers) do not receive energy from the secondary consumers, they provide energy to them.
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