Multiple Choice
Which of the following statements is true?
1
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52. Ecosystems
Energy Flow Through Ecosystems
Multiple Choice
Using the data in this table, calculate the: Trophic efficiency between insects and grass.
A
1.2%
B
6.3%
C
4.6%
Verified step by step guidance1
Identify the relevant data for calculating trophic efficiency between insects and grass. From the table, note the 'Net grass production' as 8,230 kcal/(m²*yr) and the 'Gross insect production (assimilated)' as 520 kcal/(m²*yr).
Understand that trophic efficiency is the percentage of energy transferred from one trophic level to the next. Here, it is the energy transferred from grass (producer) to insects (primary consumer).
Use the formula for trophic efficiency: \(\text{Trophic Efficiency} = \left( \frac{\text{Energy at higher trophic level}}{\text{Energy at lower trophic level}} \right) \times 100\)
Substitute the values into the formula: \(\text{Trophic Efficiency} = \left( \frac{520}{8230} \right) \times 100\)
Calculate the ratio and multiply by 100 to express the efficiency as a percentage, which gives the trophic efficiency between insects and grass.
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