The main ecological role of decomposers is to break down dead organic matter, recycling nutrients back into the ecosystem. Organisms such as bacteria, fungi, and certain insects consume dead plants, animals, and waste products, aiding in their decomposition. This process not only enriches the soil with essential nutrients but also helps maintain the balance of ecosystems by preventing the accumulation of organic waste. Decomposers are crucial for nutrient cycling, supporting plant growth and sustaining other life forms in the food web. Without them, ecosystems would become overwhelmed with dead material, disrupting ecological balance.