Question

What is an ecological pyramid? Describe different types of ecological pyramids in brief.

Hint:

Ecological pyramids:

• Number (Upright or Inverted)
• Biomass (Upright or Inverted)
• Energy (Always Upright)

Answer 1

An ecological pyramid is a graphical representation that shows the relationship between different trophic levels in an ecosystem in terms of number, biomass, or energy.

There are three types of ecological pyramids:

• Pyramid of Number: Represents the number of organisms at each trophic level. It can be upright (e.g., grassland) or inverted (e.g., tree ecosystem).
• Pyramid of Biomass: Shows the total dry weight of organisms at each trophic level. It is usually upright in terrestrial ecosystems but inverted in aquatic ecosystems.
• Pyramid of Energy: Represents the flow of energy at each trophic level. It is always upright, as energy decreases progressively from producers to consumers according to the 10% energy transfer law.