How much of the net primary productivity of a terrestrial ecosystem is eaten and digested by herbivo

Question

How much of the net primary productivity of a terrestrial ecosystem is eaten and digested by herbivores?

Professor PC Thomas Classes · Answer

(b) : Energy flow in the ecosystem follows the ten percent law (put forth by Lindeman in 1942).\ From the level of primary producers onwards, only $10 \%$ of energy is stored at the higher trophic level and $90 \%$ is lost (as heat or in respiration, etc.). This energy transfer forms the basis of life.