Question

using the 10% rule when studying trophic pyramids, if the producers at the first trophic level produce 100 joules of energy, how much energy will end up in a carnivore at the third trophic level? 1 joule 100 joules 25 joules

Explanation:

Step1: Energy transfer from first to second level

According to the 10% rule, when energy moves from the first trophic level (producers) to the second trophic level (primary consumers), the energy available at the second level is \(100\times10\% = 10\) Joules.

Step2: Energy transfer from second to third level

Then, when energy moves from the second trophic level to the third trophic level (carnivore in this case), the energy available at the third level is \(10\times10\%=1\) Joule.

Answer:

1 Joule