List two reasons to show that the existence of decomposers is essential in an ecosystem

Decomposers include micro-organisms such as bacteria and fungi that obtain nutrients by breaking down the remains of dead plants and animals. The existence of decomposers is essentialin the ecosystem because: 1. they help in the recycling of nutrients by decomposing dead animals and plants. 2 they help in decomposing dead animals and plants and thus keep ecosystem clean.

(a) The existence of decomposers is essential in a biosphere because theybreakdown complex organic substances into simple inorganic substances that can be absorbed by the plants. Thus, decomposers: * replenish the soil naturally * helps in removing the biodegradable waste. (b) In a food chain the energy moves progressively through the various trophic levels, it is no longer available to the previous level (i.e., autotrophs) and the energy captured by the autotrophs does not go back to the solar input. Hence, the flow of energy is unidirectional.

Q.List two reasons to show that the existence of decomposers is essential in an ecosystem. Ans. Role of Decomposers The decomposers are microorganisms like bacteria and fungi which help in the breakdown of organic matter or biomass of dead plants and animals into simple inorganic raw materials, such as C0 2, H 20 and nutrients. Their existence is thus essential in an ecosystem because