B2: Pyramids of Biomass

A set of revision cards for students taking AQA Additional Science. These cards are on B2 (Biology) Pyramids of Biomass. Hope these help! Please rate and comment on how they can be improved :) Also, I have a study group called AQA Additional Science where we discuss this topic and more. Feel free to become a member, the more the merrier!

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  • Created by: I P B
  • Created on: 17-12-09 17:03

Pyramids of Biomass

Pyramids of biomass reveal the mass of living material at each stage in a food chain

The amount of material and energy decreases at each stage of the food chain

Radiation from the sun is the source of energy for most living organisms

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Improving The Efficiency

To improve the efficiency of a pyramid of biomass or food chain the number of stages could be reduced


from: grass, rabbit, stoat, fox

to: grass, rabbit, fox

OR restricting the amount of energy lost by each animal in the food chain

e.g. controlling the animals movement and the surrounding temperature

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Energy Lost

Energy is lost through:

  • respiration
  • waste material e.g. faeces and urine
  • movement
  • heat
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Managing Food Production

Managing food production = reducing movement and controlling temperature to improve efficiency e.g. battery hens

Advantages of managing food production:

  • cheap animal produce available e.g. eggs, meat
  • farmers can own many animals and earn a good living
  • do not take up a lot of space if all restricted from movement
  • limiting movement increases the animals size quicker

Disadvantages of managing food production:

  • animals are kept in poor conditions
  • many animals die before they are sold
  • many suffer health problems
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Diagrams Please!






CHEERS! so just to check... is it measured in weight or energy ? :)

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