The process of how energy is flown in the ecosystem along with a diagram in a short discriptive paragraph.
In an ecosystem, green plants use solar energy and carry out photosynthesis, thereby converting the light energy to chemical energy, which is turn is stored as organic compounds. Only 2.2% of the total solar energy reaching to the environment of earth is used by green plants of photosynthesis. Plants use some of this chemical energy for their own daily metabolic needs such as respiration, growth, development, maintenance and reproduction. During this some energy is dissipated in the environment in the form of heat energy. The remaining energy is stored in form of organic compounds. Some of this stored energy is transferred to second tropic level. Then, from these primary consumers, the energy is circulated to secondary and tertiary consumers respectively. At each subsequent tropic level of consumers the amount of available energy decreases, in spite of, in each level the utilization of energy for metabolic processes is carried out more efficiently and the depletion of heat energy decreases. As a result, at last a very little amount of energy is remained, which is made available to decomposers and transformers. Thus, the amount of energy decreases during energy flow to each successive tropic level respectively. Therefore, the energy flow from solar energy to producers, primary, secondary and tertiary consumers, in other words, from lower to higher tropic level is one way flow or unidirectional flow. Thus, the energy flow continues forward to each tropic level, which cannot be available again for the former tropic level. Due to any reason if solar energy may be unavailable, then the ecosystem may be destroyed