A field contains grass with a total biomass of 10,000 kg. If 10% efficiency is assumed at each trophic level, what is the expected biomass available to secondary consumers?

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Question

A field contains grass with a total biomass of 10,000 kg. If 10% efficiency is assumed at each trophic level, what is the expected biomass available to secondary consumers?

Accepted Answer

100 kg — Primary consumers receive 10% of 10,000 kg = 1000 kg. Secondary consumers then receive 10% of 1000 kg = 100 kg. Each trophic level transfer loses approximately 90% of the biomass.

Answer

10 kg

Answer

1000 kg

Answer

100 kg

Answer

1000 g

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