What is the main role of decomposers in an ecosystem?

Decomposers play a critical role in ecosystems by breaking down dead organic matter, such as fallen leaves, dead animals, and other organic waste. This process of decomposition is essential for recycling nutrients back into the soil, making them available for plants and other producers. By transforming these materials into simpler substances, decomposers help maintain the balance of ecosystems, ensuring that nutrient cycles continue to function effectively.

Without decomposers, ecosystems would be overwhelmed with dead material and the nutrients locked within that matter would remain unavailable to primary producers. This could lead to a decline in plant growth and affect the entire food web. Thus, the primary role of decomposers is fundamental in sustaining life by ensuring the flow of energy and matter in an ecosystem.