Decomposers in ecosystems act as environmental cleaners by decaying dead plants and animals. They aid in the recycling of nutrients. They make room for a new life in the biosphere by decaying the dead. If every organism that died did not decay and rot away, the earth's surface would soon be covered in a deep layer of dead bodies that would remain intact indefinitely. A similar situation would arise if animal and plant wastes never rotted away.

@ RK, beside this decomposers play a critical role in the flow of energy through an ecosystem. They break apart dead organisms into simpler inorganic materials, making nutrients available to primary producers. Moreover, they aid in the recycling of nutrients. They make room for a new life in the biosphere by decaying the dead. They contribute to the reintroduction of different elements into moisture, soil, and air for reuse by producers such as crop plants.

Dr J. C. Tarafdar thank you for your contribution to the discussion

Without decomposers, dead leaves, dead insects, and dead animals would pile up everywhere. Imagine what the world would look like! More importantly, decomposers make vital nutrients available to an ecosystem's primary producers usually plants and algae. If there were no decomposers in the ecosystem, then dead plants and animals would remain as such, and their elements would never be returned to the soil, air and water. Just like compost in a garden, they provide essential nutrients for the growth of new organisms. They are a key aspect of the cyclical processes that maintain all life on Earth. A renewed appreciation of their importance will help humans to protect and sustain ecosystems. Decomposers in ecosystems act as environmental cleaners by decaying dead plants and animals. They aid in the recycling of nutrients. They make room for a new life in the biosphere by decaying the dead.