Question

if the producers = 700 j of energy, how many j will tertiary consumers have?

Explanation:

Step1: Recall energy - transfer rule

In an ecosystem, about 10% of energy is transferred from one trophic level to the next.

Step2: Calculate energy for primary consumers

Primary consumers get 10% of the producers' energy. So, energy for primary consumers = $700\times0.1 = 70$ J.

Step3: Calculate energy for secondary consumers

Secondary consumers get 10% of the primary - consumers' energy. So, energy for secondary consumers = $70\times0.1=7$ J.

Step4: Calculate energy for tertiary consumers

Tertiary consumers get 10% of the secondary - consumers' energy. So, energy for tertiary consumers = $7\times0.1 = 0.7$ J.

Answer:

0.7 J