Question
What is ecological pyramid? Describe the different types of pyramid.
✓
Answer
The relation between producers and consumers in an ecosystem can be graphically represented in the form of a pyramid called ecological pyramid.
- Structure: The base always represents the producers or the first trophic level and the apex represents top level consumer or the last trophic level.
- Ecological pyramids are of three types:
- Pyramid of number: The relationship between producers and consumers in an ecosystem can be represented in the form of a pyramid in terms of number called pyramid of number.
- Pyramid of biomass: The relationship between producers and consumers in an ecosystem can be represented in the form of a pyramid in terms of biomass called pyramid of biomass.
- Upright, e.g., in case of grassland ecosystem;
- Inverted, e.g., in case of pond ecosystem.
- Pyramid of energy: The relationship between producers and consumers in an ecosystem can be represented in the form of a pyramid, in terms of flow of energy called pyramid of energy. It is always upright because energy is always lost as heat at each step.
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