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Apply: flow of energy and cycling of matter in ecosystems


The following energy pyramid represents the available energy at each trophic level within a terrestrial ecosystem. The energy in the producer level is given as a rate of energy flow (kcal/m2/yr).
A diagram four rectangles stacked in a pyramid shape. From bottom to top, each rectangle gets smaller. Producers are at the bottom with an energy value of twenty one thousand two hundred and fifty kilocalories per meter squared per year. From here toward the top are primary consumers, secondary consumers, and tertiary consumers, respectively. Energy values are not listed for these levels.
Which of the following is the best estimate for the rate of energy flow in the primary consumer level in this ecosystem?
Choose 1 answer: