Question

The graphic representation of relationship between various trophic levels of a food chain is called ecological pyramids. Different types of ecological pyramids are mentioned below. Among which represent inverted pyramids ?

1. Pyramids of number of forest ecosystem and grass land ecosystem
2. Pyramids of biomass of forest ecosystem and grass land ecosystem
3. Pyramids of number of tree ecosystem
4. Pyramids of biomass of pond ecosystem

• A. 2, 3, 4
• B. 4 only
• C. None of these
• D. All

Answer 1

Answer:

A. 2, 3, 4

• An ecological pyramid is a graphical representation designed to show either the number, biomass and energy at each trophic level.

• Each of the ecological pyramids have producers at the bottom most level supporting consumers as we move towards the top of a pyramid.

• The ecological pyramids are of three types: pyramid of number, pyramid of biomass, pyramid of energy.

• The pyramid of number represents the total number of organisms at each trophic level.