4.5 understand the concepts of food chains, food webs, pyramids of number, pyramids of biomass and pyramids of energy transfer

  • Food chain  – Shows the transfer of energy up the food chain, beginning with the producer, primary consumer and so on
  • Food web – Links several animals within a habitat – it visually shows what consumes what and what is consumed by what. Direction of arrows show the direction of the ‘eating’
  • Pyramid of numbers  – A pyramid of numbers progresses through trophic levels of a food chain – this represents the number of each species by the area of a pyramid block
  • Pyramid of biomass  – Represents the mass of each consumer (+producer) by the area of a pyramid block (this takes the regular pyramid shape)
  • Pyramid of energy  – Shows the transfer of energy through the food chain
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