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A conserved interdomain microbial network underpins cadaver decomposition despite environmental variables
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A conserved interdomain microbial network underpins cadaver decomposition despite environmental variables
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A conserved interdomain microbial network underpins cadaver decomposition despite environmental variables
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Journal Article
A conserved interdomain microbial network underpins cadaver decomposition despite environmental variables
2024
Overview
Microbial breakdown of organic matter is one of the most important processes on Earth, yet the controls of decomposition are poorly understood. Here we track 36 terrestrial human cadavers in three locations and show that a phylogenetically distinct, interdomain microbial network assembles during decomposition despite selection effects of location, climate and season. We generated a metagenome-assembled genome library from cadaver-associated soils and integrated it with metabolomics data to identify links between taxonomy and function. This universal network of microbial decomposers is characterized by cross-feeding to metabolize labile decomposition products. The key bacterial and fungal decomposers are rare across non-decomposition environments and appear unique to the breakdown of terrestrial decaying flesh, including humans, swine, mice and cattle, with insects as likely important vectors for dispersal. The observed lockstep of microbial interactions further underlies a robust microbial forensic tool with the potential to aid predictions of the time since death.
A conserved network of bacteria and fungi underpins cadaver decomposition despite selection effects of location, climate and season.
