- The decomposers in an ecosystem play the most significant role of all the organisms. Decomposers discharge nutrients from dead and decaying organic matter back into the environment.
- If the nutrients are not returned to the environment, they will eventually all become locked in the body wastes and dead bodies of animals and plants, and biogeochemical cycles of mineral nutrients will come to an end.
- Mold and bacteria are examples of microorganisms that break down the ecosystem. They consume decaying dead organisms (both plant and animal) and disassemble them into simpler molecules as their food.
- These are freely released into the atmosphere and used by food producers to synthesize the ingredients for their products. They are referred to as "nature's scavengers" since they eat dead things.