Question

there is 4,500 kcal of energy available at the 1st trophic level. how much energy is available at the 3rd trophic level? 450 kcal 4.5 kcal .45 kcal 45 kcal

Explanation:

Step1: Energy transfer rule

According to the 10% - energy - transfer rule in an energy pyramid. Energy available at the next trophic level is 10% of the previous one.

Step2: Energy at the 2nd trophic level

Energy at the 2nd trophic level (rabbits) = \(4500\times0.1 = 450\) kcal.

Step3: Energy at the 3rd trophic level

Energy at the 3rd trophic level (snakes) = \(450\times0.1=45\) kcal.

Answer:

45 kcal