A biomass pyramid is a diagram that shows the population at each level of a food chain. The bottom level of the pyramid shows the producers, the next level shows the primary consumers, the third level shows secondary consumers, and so on. In most ecosystems, there are more producers than primary consumers, more primary consumers than secondary consumers, and so on. An inverted biomass pyramid depicts an ecosystem that has more animals at the top of the food chain than food available for those animals to eat.
- Pencils, pens or other drawing materials
You may wish to include data about the number of living things present in each level of the biomass pyramid.
Research the plants and animals that live in the ecosystem you will represent in the biomass pyramid.
Draw the base of the pyramid. This level will represent the producers (plants) in the ecosystem.
Draw the next level of the pyramid on top of the first. This level will represent the primary consumers (herbivores) in the ecosystem.
Draw the third level of the pyramid. Make this level slightly smaller than the second level. The third level includes secondary consumers.
Draw the final level of the biomass pyramid. This level should be the smallest level. It will show tertiary consumers (carnivores) that eat the animals on the level below.
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Rebecca Roberts has been writing professionally since 2006. She has written on topics such as health care, insurance, cosmetics and coaching youth sports. Roberts holds a Bachelor of Arts in English from the University of Chicago.