In a food chain with four trophic levels, what would be the energy in the top trophic level if the energy contained in the primary producer level is 40,000 kcal/m2/yr? Assume a trophic level transfer efficiency of 10%.
A. 4,000 kcal/m2/yr
B. 40 kcal/m2/yr
C. 0.4 kcal/m2/yr
D. 4 kcal/m2/yr
E. 400 kcal/m2/yr
Answer: B
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