Detritivore

Definition

An organism that obtains nutrients by ingesting detritus—dead and decaying organic matter of plant or animal origin. In arthropod ecology, detritivores such as millipedes (Diplopoda), woodlice (terrestrial isopods), many beetle larvae, and non-biting midge larvae (Chironomidae) perform critical ecosystem services by fragmenting coarse organic material, thereby accelerating decomposition and nutrient cycling. Unlike decomposers (bacteria and fungi, which absorb dissolved nutrients), detritivores are ingestive feeders that mechanically process particulate matter, initiating the first stage of remineralization before microbial decomposers complete nutrient release.

Etymology

From Latin detritus (wearing away, rubbing off) + -vore (eating), modeled on carnivore, herbivore.

Example

Woodlice (Porcellio spp.) are familiar terrestrial detritivores in temperate gardens, consuming decaying leaf litter and returning locked nutrients to the soil food web.

Synonyms

• saprophage

Related Terms

• decomposer
• detritus
• saprophagy
• remineralization
• millipede
• isopod
• scavenger
• Coprophagy

Usage Notes

Distinguished from decomposers: detritivores ingest discrete particles (macroconsumption), whereas bacteria and fungi absorb at molecular scale. The terms are often conflated in general usage, but specialists reserve detritivore for ingestive feeders, typically animals. Saprophage is a near-synonym but sometimes restricted to consumers of dead plant matter specifically.