What role do decomposers play in an ecosystem?

Decomposers are essential to the functioning of ecosystems because they break down dead organic matter, such as fallen leaves, dead animals, and other waste materials. This process of decomposition is crucial for recycling nutrients back into the soil, making them available for plants and other organisms. Without decomposers, ecosystems would become overwhelmed with waste, and nutrients would remain locked in dead materials, unavailable for use by living organisms.

By converting organic matter into simpler substances, decomposers facilitate nutrient cycling, which supports plant growth and maintains ecosystem health. This process also contributes to soil fertility, allowing for a more robust food web where energy flow is continuous.

The other choices relate to different ecological processes or functions. While photosynthesis is vital for primary producers, it does not apply to decomposers. Competition with consumers is also not a direct role of decomposers, as they operate at a different level within the food web. Lastly, while oxygen production is a significant aspect of photosynthetic organisms, it is not relevant to the function of decomposers. Hence, the role of decomposers in recycling nutrients is fundamental and clearly defines their importance in maintaining ecological balance.