. If 10,000 J of energy is present at the first trophic level in the grassland ecosystem, then this much of energy can support tertiary consumers with an energy content of (1) 100 J (2) 1 J (3) 10 J (4) 1000 J

Can you also explain if answer will be same if it was tropical or aquatic ecosysyem?

Dear student,
Please find below the solution to the asked query

The correct option is (3).
According to the 10% law,  only 10% of energy is transferred from one trophic level to the next trophic level.

According to the question, 10,000J of energy is available at producer level (first tropic level).
Then at the first consumer level i.e. herbivore level, the energy will be 10% of 10,000J = 1,000J
At the second consumer level, the energy will be 10% off 1,000J = 100J.
At the tertiary consumer level, the energy will be 10% off 100J = 10J.
Hence the answer is 10J of energy.

Yes, the answer will be same if it was tropical or aquatic ecosystem because in all ecosystems the energy at lower tropic level is always more than the energy at higher trophic level.

Hope this information will clear your doubts about the amount of energy at tertiary trophic level.
If you have any more doubts just ask here on the forum and our experts will try to help you out as soon as possible.

Regards

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