Question

practice it!
if producers have 100% of the energy source in this model, then what percentage of energy, which originated from the producer, does a third level consumer have?
10.0%
1.00%
0.01%
100%
0.10%

Explanation:

Step1: Recall 10% energy transfer rule

Each trophic level retains 10% ($\frac{10}{100}=0.1$) of the previous level's energy.

Step2: Calculate 1st consumer energy

Energy for 1st level consumer: $100\% \times 0.1 = 10\%$

Step3: Calculate 2nd consumer energy

Energy for 2nd level consumer: $10\% \times 0.1 = 1\%$

Step4: Calculate 3rd consumer energy

Energy for 3rd level consumer: $1\% \times 0.1 = 0.1\%$

Answer:

0.10%