Decomposers are organisms which feed on the dead bodies of plants and animals. These are micro-organisms like bacteria and fungi which break down the complex organic compounds present in dead organisms like plants and animals and their products into simpler substances.

Role in ecosystem:

1. Decomposers help in disposing off the wastes and dead bodies of plants and animals. Therefore, they clean the environment.

2. The decomposers produce some acids which are useful in solubilisation of some minerals.