Decomposers play a crucial role in the ecosystem by breaking down dead organic matter, such as dead plants and animals, into simpler compounds. This process releases nutrients back into the soil, which can then be taken up by plants to support their growth. Decomposers also help in recycling nutrients, as they convert complex organic compounds into simpler forms that can be used by other organisms in the ecosystem. Overall, decomposers play a key role in maintaining the balance and sustainability of the ecosystem.