Question

Ecological pyramids are of

• A. Two types
• B. Three types
• C. Four types
• D. Five types

Answer 1

The correct option is B Three types

A pyramid-shaped diagram represents quantity wise numbers of organisms, energy relationships, and biomass of an ecosystem; In lower trophic levels number of organisms are high(plants) and at the highest trophic level, lesser number as some energy is lost as heat, in each transformation. This relationship is sometimes called an ecological pyramid. The ecological pyramids represent the trophic structure and also trophic function of the ecosystem. In many ecological pyramids, the producer form the base and the successive trophic levels make up the apex. The ecological pyramids may be of following three kinds-

Pyramid of Number- It is the arrangement of trophic level on the basis of the number of organism present at each stage.

Pyramid of Biomass- It is the arrangement of trophic level on the basis of biomass present at each trophic levels.

Pyramid of Energy- It is the arrangement of trophic level on the basis of energy flow between them.