A grassland ecosystem has producers with a dry biomass of 50,000 kg per hectare. Primary consumers have a dry biomass of 5,000 kg per hectare. What is the efficiency of biomass transfer from producers to primary consumers?

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Question

A grassland ecosystem has producers with a dry biomass of 50,000 kg per hectare. Primary consumers have a dry biomass of 5,000 kg per hectare. What is the efficiency of biomass transfer from producers to primary consumers?

Accepted Answer

10% — Efficiency of transfer = (biomass at next level ÷ biomass at previous level) × 100. Here: (5,000 ÷ 50,000) × 100 = 10%. This is the typical approximate efficiency between trophic levels.

Answer

10%

Answer

5%

Answer

90%

Answer

50%

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