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AQA · GCSE · Biology · Higher

Biomass transfer estimation

Q02.2 1 mark

Figure 2 shows a section through a peat bog containing moss and other plants.

Figure 2
Figure 2

Figure 2

Enlarged question image

Figure 2

The peat bog in Figure 2 is a stable community. The moss produces biomass at a rate of 340 g/m²/year. What is the approximate biomass of the moss that becomes biomass in primary consumers? Tick (✓) one box.

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Marking points

  1. 1 Selects 34 g/m²/year.

Why this answer loses marks

All of the moss biomass becomes primary-consumer biomass.

This ignores the approximate transfer fraction between trophic levels.