What role do decomposers play in an ecosystem?

Decomposers play a crucial role in ecosystems by breaking down dead organic matter. This process is essential for nutrient cycling, as it converts complex organic materials from dead plants and animals into simpler substances that can be reused by living organisms. When decomposers such as fungi and bacteria break down this matter, they release nutrients back into the soil, making them available for plants to absorb. This not only enriches the soil but also helps to maintain the overall health and balance of the ecosystem. By facilitating the recycling of nutrients, decomposers support plant growth and contribute to the food web, as they impact the availability of resources for all organisms within the ecosystem.