Question

multiple choice 1 point
an energy pyramid for a wetland ecosystem has five levels. about 10,000 joules (j) of energy are available to organisms at the base of the pyramid. how many units
of energy are available to top predators?
1 j
10 j
100 j
1.000 j

Explanation:

Step1: Apply the 10% energy transfer rule

In an energy pyramid, approximately 10% of energy is transferred from one trophic level to the next. If the base has \( E = 10000\space J\), for a 5 - level pyramid, the energy at the top (4th transfer) is calculated as \(E_{top}=E\times(0.1)^{n}\), where \(n\) is the number of transfers. Here \(n = 4\) (since from base to top - predator is 4 transfers).

Step2: Calculate the energy

$$
LATEXBLOCK0
$$

Answer:

1 J