In comparison to the complexity of the decay process, the resulting volatile pattern does show some consistency. The composition of microbial communities is complex, and communities of different species interact with each other in succession. In addition, micro-organisms from the environment colonize the cadaver. Many microbes are already present inside and on a vertebrate, and these can initiate microbial decay.
Micro-organisms are the main producers of VOCs, which are by- or end-products of microbial metabolism. In this review, we combine the results from studies on volatile organic compounds (VOCs) detected during this decay process and those on the biochemical formation of VOCs in order to improve our understanding of the decay process. The main factor is the metabolism of the microbial species present inside and on the vertebrate. Volatile emission during vertebrate decay is a complex process that is understood incompletely.
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