What amount of energy would be at the producer level if it is 50 KJ at third trophic level?

5000 KJ

The correct answer is Option (4) → 5000 KJ

In a typical ecosystem, about 10% of the energy is transferred from one trophic level to the next. This means that each trophic level receives only 10% of the energy from the level directly below it.

Given that the energy at the third trophic level is 50 KJ, we can work backward:

1. Third trophic level: 50 KJ
2. Second trophic level: 50 KJ × 10 = 500 KJ
3. First trophic level (producers): 500 KJ × 10 = 5000 KJ

Thus, the energy at the producer level would be 5000 KJ.