15. Could an ecosystem function without decomposers? Why or why not? a. An ecosystem would just be fine without decomposers. c. Ecosystem needs decomposers in order for living things to survive. Decomposers continuously recycle the soil-based nutrients plants need to grow. d. Decomposers do not play any role in an ecosystem. b. Ecosystem needs decomposers in order for living things to survive. Decomposers continuously recycle the soil-based nutrients animals need to grow.​