Write a short note on the pyramid of number for any food chain? What can we conclude from this pyramid of numbers? (AS1)

A. tree B. Insect C. Woodpecker

i. The graphical representation of the number of organisms at each trophic level in a pyramid is called pyramid of numbers.

ii. In a pyramid, when we move from the primary consumers to top consumer (large carnivores), the size increases but a number of animals decreases.

iii. For example in a forest, the aphids are very small in size and occur in huge numbers, the lady birds which feed on them are distinctly larger and not so are numerous.

iv. The insectivorous birds like crows which feed on the lady birds and are only presented in small numbers.

Sometimes, the pyramid of numbers does not look like a pyramid. In this question, the producer is a large tree and the primary consumer is small insects and very large in number and secondary consumer is bird woodpecker. Although the consumers are very small as compared to tree. Whatever may be the case, the producers still goes at the bottom of the pyramid.