What happens to most of the energy in the ecosystem?

In any ecosystem, the Sun is the energy source. Light energy absorbed by the chlorophyll in producers(or plant) is converted to chemical energy during photosynthesis. Energy in the producers is then passed to the next trophic level by feeding. The flow of energy through the ecosystem is non-cyclic(linear)Energy is released as heat to the surrounding as it flows through the ecosystem. This heat energy does not return to the same system or organism that produced it. Hence, the energy cannot be recycled in the ecosystem. Dead organisms and egested and excreted materials contain trapped chemical energy. This energy is released by the activity of decomposers. Decomposers use some of these trapped chemical energy for their needs. The rest is lost as heat energy.