Describe the stages of decomposition in detail.

Decomposition occurs in a systematic sequence of stages, each involving specific biological and chemical changes that convert complex organic matter into simpler substances.

The first stage is fragmentation, where detritivores such as earthworms, termites, and insects break down large pieces of dead organic matter into smaller fragments. This increases the surface area, making it easier for microorganisms to act.

The second stage is leaching, in which water dissolves soluble substances like sugars and minerals from the decomposing material and carries them into the soil. This enriches the soil with nutrients.

The third stage is catabolism, where microorganisms such as bacteria and fungi secrete enzymes that chemically break down complex organic compounds into simpler molecules. This is the most active phase of decomposition.

The final stage is humification and mineralization. During humification, partially decomposed organic matter forms humus, a dark, nutrient-rich substance that improves soil fertility. In mineralization, inorganic nutrients such as nitrates, phosphates, and carbon dioxide are released into the soil and atmosphere, making them available for plant uptake.

These stages together ensure efficient recycling of nutrients and maintain the balance of ecosystems.