(a) Indicate the flow of energy in an ecosystem. Why is it unidirectional? Justify. 

(b) What will happen if decomposers are absent in an ecosystem?





The flow of energy in an ecosystem is as follows:

Food Chain - Teachoo.jpg

The flow of energy is progressively from one trophic level to another and does not revert back . Hence, it is said to be unidirectional. Further, the available energy decreases in the higher trophic levels making it impossible for energy to flow in the reverse direction. 


Decomposers break down dead and decaying organic matter into simpler substances and provide the nutrients back to the soil.

In its absence, the recycling of materials in the biosphere will not take place.e

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Food Chain Sun Producer Herbivor Carnivore

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CA Maninder Singh is a Chartered Accountant for the past 13 years and a teacher from the past 17 years. He teaches Science, Economics, Accounting and English at Teachoo