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Related Concept Videos

Fungal Group Zygomycota01:29

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Zygomycota, previously classified as a distinct fungal group, are primarily terrestrial, saprophytic molds that play a crucial role as decomposers. Recent phylogenetic studies have revealed that these fungi are now divided into two major clades — Mucoromycota, which includes many symbiotic species, and Zoopagomycota, which primarily consists of parasitic and pathogenic fungi. These groups exhibit distinct ecological roles and reproductive strategies while sharing key structural and...
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Soil Fungal Communities Investigated by Metabarcoding Within Simulated Forensic Burial Contexts.

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|August 15, 2020
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Soil fungal communities shift during animal decomposition, impacting forensic science. Fungal richness decreases with time, and soil microbial composition changes significantly even after six months, offering potential for post-mortem interval estimation.

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forensic sciencefungal communitiesmicrobial ecologynecrobiomenext-generation sequencingpost-mortem intervalvertebrate decomposition

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Area of Science:

  • Forensic Science
  • Soil Microbiology
  • Mycology

Background:

  • Decomposition of animal carcasses alters soil biochemistry and microbial populations.
  • While bacterial impacts are studied, the effects on soil fungal communities during decomposition remain less understood.
  • Understanding fungal shifts can aid in estimating post-mortem intervals (PMI) and clarifying fungal roles in decomposition stages.

Purpose of the Study:

  • To investigate the impact of buried animal carcass decomposition on soil fungal communities over time.
  • To determine the suitability of internal transcribed spacer (ITS) 1 and 2 for mycobiome metabarcoding in this context.
  • To identify fungal taxonomic trends associated with different post-mortem intervals for forensic applications.

Main Methods:

  • Pig carcasses were buried for 1 to 6 months.
  • Soil samples were collected from the carcass-soil interface at various post-mortem intervals.
  • Mycobiome metabarcoding analysis was performed targeting ITS 1 and ITS 2 regions.

Main Results:

  • Fungal taxonomic richness decreased with increasing post-mortem intervals.
  • Soil fungal communities showed significant alterations persisting beyond 6 months, indicating slow recovery.
  • Specific fungal taxa, such as Mortierellomycota and Ascomycota, increased at later stages, while Basidiomycota decreased.
  • Most observed fungal changes originated from the soil, not the carcass itself.

Conclusions:

  • Decomposition significantly alters soil fungal communities, with changes persisting for extended periods.
  • Observed fungal shifts and specific taxonomic trends offer potential biomarkers for post-mortem interval estimation in forensic investigations.
  • This study establishes a baseline for future research on fungal roles in prolonged decomposition and forensic science applications.