Cadaveric Decomposition Island (CDI)
Definition
The patch of soil beneath and around a decomposing body, enriched in nitrogen, phosphorus, and organic compounds from decomposition fluids. CDI chemistry and its associated invertebrate communities persist for years and can betray the former presence of a body even after remains are removed.
- Abbreviation
- CDI
- Location
- Soil beneath and around a decomposing body
- Enriched in
- Nitrogen, phosphorus, organic decomposition compounds
- Persistence
- Can remain detectable for years after removal
Common questions
How can a CDI help investigators after a body has been moved from a scene?+
The altered soil chemistry and distinct invertebrate community it supports can persist for years, so soil sampling and chemical or entomological analysis at a suspected former grave site can indicate a body was once present even though it has since been removed or relocated.
What botanical or ecological changes are often associated with a CDI?+
Nutrient enrichment from decomposition fluids can suppress some plant growth immediately over the body while later promoting lush regrowth around the margins, and the altered soil chemistry can shift the local invertebrate and microbial community composition detectably.
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