Saturday, 30 March 2013

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

A food chain shows the transfer of energy up the food chain beginning with the producers then the primary consumers and so forth.

A food web links several animals within a habitat showing what consumes what and is consumed by what.
A pyramid of number progresses through the trophic levels of a food chain representing the number of each species by the area of the pyramid block.
A pyramid of biomass represents the mass of each consumer (and producer) by the area of a pyramid block.

diagram representing energy transfer in a food chain
A pyramid of energy shows the transfer of energy through the food chain.


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