Question

What is an ecological pyramid? Explain various types of ecological pyramids?

Answer 1

Ecological Pyramid. It is a graphic representation of the relationship between organisms at various trophic levels in a food chain. The basis of an ecological pyramid is the biomass, energy, and number.

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Answer 2

              Ecological Pyramids

⇒ The producers and consumers can be arranged into several feeding or nutritional group each is known as trophic level.

⇒ Trophic structure of an ecosystem can be express by means of ecological pyramids.

⇒ The concept of ecological pyramid was given by Charles Elton in 1927. each food level is also called trophic level.

Types of ecological pyramids

These are of three types

1. Pyramid of Number

⇒ In this, number of individuals at each trophic level is shown

⇒ Pyramids of number is upright in case of grassland and pond ecosystem, intermediate in forest ecosystem and inverted in parasitic food chain.

2. Pyramids of Biomass

⇒ In this, the biomass of each trohic level is shown in pyramids.

⇒ Pyramids of biomass may be upright in grassland and forest ecosystem whereas it inverted in pond ecosystem.  

3. Pyramid of Energy

⇒ Energy content or productivity of different trophic level is shown in pyramid of energy.

⇒ Pyramid of energy is always upright in all ecosystems.