# An ecological pyramid is a graphical representation of the relationship between the different living organisms at different trophic levels. Explain the three ecological pyramids in detail. What are the shortcomings of each type's ecological pyramids in the study of ecosystem?

An ecological pyramid is a graphical representation of the relationship between the different living organisms at different trophic levels. Explain the three ecological pyramids in detail. What are the shortcomings of each type's ecological pyramids in the study of ecosystem?
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Ecological pyramids are also referred to as energy pyramids, and they are of three major types.
Three types of ecological pyramids:
- Pyramid of number includes the number of organisms in each trophic level, and the pyramid is upright.
- Pyramid of Biomass includes the amount of biomass produced at each trophic level, and the pyramid is upright except for oceans.
- Pyramid of energy includes productivity of the biomass at each trophic level, and the pyramid is always upright.
Shortcomings:
- The same species may belong to two or more trophic levels.
- It assumes a simple food chain while we have only complex food webs in nature.
- Saprophytes are not included in the pyramids.
- Variations in season and climate are not included.