Explain the role of microorganisms in decomposition.

Microorganisms, primarily bacteria and fungi, are the main agents of decomposition. They chemically break down complex organic matter into simpler substances through enzymatic action.

These microorganisms secrete extracellular enzymes that digest large organic molecules such as proteins, carbohydrates, and lipids into smaller compounds that can be absorbed and utilized. For example, bacteria decompose nitrogen-rich materials into ammonia, while fungi break down tough substances like cellulose and lignin found in plant cell walls.

Microorganisms also regulate the rate of decomposition depending on environmental conditions such as temperature, moisture, and oxygen availability. Their activity leads to the release of essential nutrients like nitrogen, phosphorus, and carbon back into the soil.

In addition, different types of microorganisms dominate different stages of decomposition, ensuring a continuous and efficient breakdown process.

Thus, microorganisms act as biochemical catalysts in ecosystems, enabling nutrient recycling and maintaining ecological balance.