(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?
Answer:
(a)
The flow of energy in an ecosystem is as follows:
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.
(b)
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