The main difference between a detritivore and a decomposer lies in their roles in the decomposition process.
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Detritivores are organisms that consume dead organic matter, such as plant leaves, animal remains, and other decomposing material. They physically ingest this material and break it down into smaller pieces, contributing to the decomposition process. Examples of detritivores include earthworms, millipedes, and certain types of fungi.
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Decomposers, on the other hand, are primarily microorganisms, such as bacteria and fungi, that break down dead organic matter at the molecular level. They secrete enzymes that help to decompose complex organic materials into simpler substances, recycling nutrients back into the ecosystem.
In summary, detritivores consume and break down dead matter, while decomposers chemically break down organic material and recycle nutrients.