When the relationship between various trophic levels like producers, herbivores and carnivores in an ecosystem is represented graphically, it appears in the form of a pyramid.
Pyramid of numbers depicts the total number of organisms present at each trophic level in a community.
It is done by counting all the organisms and then grouping them into their trophic level, like producer, herbivore or carnivore.
In a pyramid of numbers, the producers form the base of the pyramid as their number is maximum.
Pyramid of numbers depicts the following:
Number of organisms keep decreasing with each trophic level.