Decomposers, including bacteria and fungi, play a pivotal role in nutrient cycling. They are responsible for breaking down dead organic matter, such as plant and animal remains, into simpler compounds. This process releases essential nutrients like nitrogen, phosphorus, and carbon back into the ecosystem, making them available for use by producers. Decomposers thus maintain soil fertility, support plant growth, and contribute to the overall health of ecosystems. By recycling nutrients, they ensure the continuity of food webs and contribute to the balance of ecosystem dynamics.