Particulate organic matter (POM) refers to the fraction of organic material that is composed of small particles, typically ranging in size from 1 micrometer to 1 millimeter. This material originates from the decomposition of plant and animal residues, and plays a vital role in terrestrial ecosystems by influencing nutrient cycling, soil structure, and carbon storage. POM acts as a source of energy and nutrients for a variety of organisms within the soil and aquatic environments, contributing significantly to the overall carbon balance in these systems.
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