Bacteria helps dead organisms decompose and enrich the soil with nutrients, the nutrients then get reabsorbed by producers/plants and the cycle begins again.
Bacteria are known to be the decomposers of the nature that helps in cleaning the nature. Bacteria helps in the decomposition of the organic matter back into the soil.
The plants and animals die in soil and the bacteria present in the soil decomposes the organic matter and brings the nutrients back into the soil.
Hence, bacteria are considered to be decomposers that recycles the nutrients back into the soil.
