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Level 21

Pyramids of biomass


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Trophic level
This is a feeding level
Moving up a trophic level
There is less energy and less biomass as you do this
Organism size
Normally as you go up a trophic level less animals are fed at each stage, but this isn't nesseseraly true
Example of a food chain
100 dandelions feeds 10 rabbits which feeds 1 fox
Bar in a pyramid of biomass
Each on of these represents the mass of the living material in that stage of the food chain - basically how much the organism at each level would weigh
Pyramid shaped
Biomass pyramids are always this shape
The biggest bar at the bottom
This represents the producer
The second largest bar above the producer
This represents the primary consumer
The third largest bar above the primary consumer
This represents the secondary consumer