LIFE SCIENCE

Detailed explanation-1: -The base of the pyramid is composed of species called autotrophs, the primary producers of the ecosystem.

Detailed explanation-2: -Producers are at the bottom of the pyramid because they are able to transform the sun’s energy into a large amount of plant energy through the process of photosynthesis. Producers are the base of energy for most food chains and food webs. Animals that eat plants make up the next level.

Detailed explanation-3: -All the animals or consumers depend on plants for their survival or food. So, we say that the base of an ecological pyramid represents the producers or first trophic levels i.e. plants.-It never takes into account the same species belonging to two or more trophic levels.

Detailed explanation-4: -Energy Pyramid Examples In a deciduous forest, the green plants, such as grass, trees and shrubs make up the producer trophic level. This level contains 100% of the energy from the sun and thus occupies the bottom of the energy pyramid.