The amount of energy available for 2nd level consumers = 10,000 kcal so the level with 100,000 kcal will be for ..................

To determine the energy available for the primary producers (1st level consumers) given that the energy available for the 2nd level consumers is 10,000 kcal, we can use the principles of energy transfer in an ecosystem.

1. ### Break Down the Problem

• We know the energy available for 2nd level consumers: 10,000 kcal.
• We want to determine the energy available for the 1st level consumers, which is where primary producers (like plants) fit in.

2. ### Relevant Concepts

• Energy transfer in an ecosystem generally follows the rule of 10%, meaning only about 10% of the energy from one trophic level is available to the next level.
• Therefore, if $E_2$ is the energy for the 2nd level consumers and $E_1$ is the energy for the 1st level consumers, we can express this relationship as:

$E_2 = 0.1 \cdot E_1$

3. ### Analysis and Detail

• Rearranging the equation gives us:

$E_1 = \frac{E_2}{0.1} = \frac{10,000 \text{ kcal}}{0.1} = 100,000 \text{ kcal}$

4. ### Verify and Summarize

• The calculations show that if the 2nd level consumers have 10,000 kcal, then, based on the 10% energy transfer rule, the energy available for the 1st level consumers (primary producers) would indeed be 100,000 kcal.

Final Answer

The level with 100,000 kcal will be for 1st level consumers (primary producers).