Pyramid chart
Hawk: 1 unit of energy
Snakes: 10 units
Frogs: 100 units
Grasshoppers: 1,000 units
Grass and plants: 10,000 units
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What a pyramid chart is
“An ecological pyramid (also trophic pyramid, Eltonian pyramid, energy pyramid, or sometimes food pyramid) is a graphical representation designed to show the biomass or bioproductivity at each trophic level in an ecosystem.”
Types of pyramid chart
When to use a pyramid chart
Science
Show how energy passes up a food chain, with less of it at each level.
Nature
Plants at the bottom feed everything above them, up to the hawk at the top.
Explaining
The width of each level shows how much there is, so the picture does the explaining.
How to make a pyramid chart
- 1The topHawk: 1 unit of energy
- 2Each levelHawk: 1 unit of energySnakes: 10 units
- 3The wide baseHawk: 1 unit of energySnakes: 10 unitsFrogs: 100 unitsGrasshoppers: 1,000 unitsGrass and plants: 10,000 units
Helpful resources
Questions
- What goes at the bottom?
Ecological pyramids begin with producers on the bottom (such as plants) and proceed through the various trophic levels (such as herbivores that eat plants, then carnivores that eat flesh, then omnivores that eat both plants and flesh, and so on).
From Wikipedia — Ecological pyramid — CC BY-SA 4.0- Do I need an account?
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