Transfers of biomass between trophic levels
I can explain biomass transfer between trophic levels in food chains and calculate the efficiency of biomass transfers.
Transfers of biomass between trophic levels
I can explain biomass transfer between trophic levels in food chains and calculate the efficiency of biomass transfers.
These resources will be removed by end of Summer Term 2025.
Lesson details
Key learning points
- All food chains start with a producer that makes the biomass that is transferred to consumers in higher trophic levels.
- Not all biomass from a trophic level is passed to the next one (due to respiration, uneaten parts, egestion, excretion).
- Pyramids of biomass are scaled diagrams that can be used to show the amount of biomass present at each trophic level.
- % efficiency of biomass transfer = (biomass in higher trophic level ÷ biomass in lower trophic level) × 100
- How efficiency of biomass transfer affects the number of organisms in higher trophic levels.
Keywords
Producer - A producer is an organism that makes its own food.
Biomass - Biomass is the mass of living material in one or more organisms.
Trophic level - A trophic level is the position of an organism in a food chain diagram.
Pyramid of biomass - A pyramid of biomass is a diagram which shows the biological mass (biomass) of organisms at each trophic level in a food chain diagram.
Efficiency - The efficiency is how much of something is transferred compared to how much is available, e.g. how much biomass is transferred to a consumer compared to how much is available.
Common misconception
A misconception that is often seen is that there is a build up of biomass along a food chain.
The lesson outlines how biomass is actually lost between trophic levels through life processes.
To help you plan your year 11 biology lesson on: Transfers of biomass between trophic levels, download all teaching resources for free and adapt to suit your pupils' needs...
To help you plan your year 11 biology lesson on: Transfers of biomass between trophic levels, download all teaching resources for free and adapt to suit your pupils' needs.
The starter quiz will activate and check your pupils' prior knowledge, with versions available both with and without answers in PDF format.
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The assessment exit quiz will test your pupils' understanding of the key learning points.
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Equipment
None required.
Licence
Starter quiz
6 Questions





Exit quiz
6 Questions

producer
primary consumer
secondary consumer
tertiary consumer
quaternary consumer

