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Seasonal variation of postmortem microbial communities
David O Carter1, Jessica L Metcalf, Alexander Bibat
1Laboratory of Forensic Taphonomy, Forensic Sciences Unit, Division of Natural Sciences and Mathematics, Chaminade University of Honolulu, Honolulu, HI, 96816, USA, david.carter@chaminade.edu.
Forensic Science, Medicine, and Pathology
|March 5, 2015
Summary
Microbial communities in soil near swine carcasses exhibit predictable succession patterns. Seasonal differences in decomposition impact these microbial changes, highlighting the need for seasonal considerations in forensic science.
Area of Science:
- Forensic Science
- Microbiology
- Ecology
Background:
- Microbial communities associated with decomposing bodies undergo ecological succession.
- Previous studies utilized rodent and swine models under experimental conditions.
Purpose of the Study:
- To investigate microbial succession in soils associated with swine carcasses under field conditions during summer and winter.
- To determine the reproducibility of postmortem microbial community changes.
- To assess the role of soil microbes in the postmortem microbial community.
Main Methods:
- Experimental field study using swine carcasses.
- Monitoring microbial communities in associated soils during summer and winter decomposition.
- Analysis of microbial succession patterns.
Main Results:
- Postmortem microbial communities in soil exhibit specific and reproducible changes.
- Soil microbes are a significant component of the overall postmortem microbial community.
- Decomposition effects on soil microbial communities differ significantly between summer and winter.
Conclusions:
- Microbial ecological succession in soil is a valuable tool for medicolegal death investigation.
- Seasonal variations in decomposition necessitate distinct summer and winter models for accurate forensic analysis.
- Further research is required to understand the seasonality of decomposition and its impact on microbial succession.
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