Question

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The ecological pyramid below shows the organisms found in each trophic level of a simplified ecosystem.

ecological pyramid

The amount of energy at each trophic level in an ecosystem decreases as it moves through the ecosystem. Typically, only about 10 percent of the energy at one trophic level is transferred to the next level. The remaining energy is lost through metabolic processes as heat.

Suppose that, in the ecosystem modeled above, 150,000 kcal (kilocalories) of energy are contained within green plants. Assuming that the amount of energy transferred from one trophic level to the next is exactly 10 percent, determine the following amounts of energy in the ecosystem.

Answer 1

Answer:

It's quite simple

The next tropical level will get 15000kcal

The next will get 1500kcal

and so on

Answer 2

Answer:

The total amount of energy in all trophic levels is the sum of the energy in green plants, herbivores, primary carnivores, and secondary carnivores, which is 150,000 + 15,000 + 1,500 + 150 = 166,650 kcal.

Explanation:

How much energy is contained within herbivores?

15,000 kcal

Only 10% of the energy in green plants is transferred to herbivores, so 10% of 150,000 kcal is 15,000 kcal.

How much energy is contained within primary carnivores?

Answer: 1,500 kcal

Only 10% of the energy in herbivores is transferred to primary carnivores, so 10% of 15,000 kcal is 1,500 kcal.

How much energy is contained within secondary carnivores?

Answer: 150 kcal

Explanation: Only 10% of the energy in primary carnivores is transferred to secondary carnivores, so 10% of 1,500 kcal is 150 kcal.

What is the total amount of energy contained within all trophic levels?

Answer: 166,650 kcal

The total amount of energy in all trophic levels is the sum of the energy in green plants, herbivores, primary carnivores, and secondary carnivores, which is 150,000 + 15,000 + 1,500 + 150 = 166,650 kcal.

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