Define ecological pyramid. Describe pyramid of energy flow with an example.

Explanation

It is the graphical representation of trophic structure and function of a food chain Pyramid of energy - It is a graphical representation of available energy at successive tropic levels in a food chain. Energy level is expressed as kilo calories. It is the typical upright pyramid. It illustrate decreasing energy level at successive tropic level from producers at the base to the consumers. Energy level is maximum in producers, less in consumers.
Eg:- Pond food chain