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Function of bacterial community dynamics in the formation of cadaveric semiochemicals during in situ carcass decomposition

Title data

Pascual, Javier ; von Hoermann, Christian ; Rottler-Hoermann, Ann-Marie ; Nevo, Omer ; Geppert, Alicia ; Sikorski, Johannes ; Huber, Katharina J. ; Steiger, Sandra ; Ayasse, Manfred ; Overmann, Jörg:
Function of bacterial community dynamics in the formation of cadaveric semiochemicals during in situ carcass decomposition.
In: Environmental Microbiology. Vol. 19 (2017) Issue 8 . - pp. 3310-3322.
ISSN 1462-2920
DOI: https://doi.org/10.1111/1462-2920.13828

Abstract in another language

The decomposition of dead mammalian tissue involves a complex temporal succession of epinecrotic bacteria. Microbial activity may release different cadaveric volatile organic compounds which in turn attract other key players of carcass decomposition such as scavenger insects. To elucidate the dynamics and potential functions of epinecrotic bacteria on carcasses, we monitored bacterial communities developing on still‐born piglets incubated in different forest ecosystems by combining high‐throughput Illumina 16S rRNA sequencing with gas chromatography‐mass spectrometry of volatiles. Our results show that the community structure of epinecrotic bacteria and the types of cadaveric volatile compounds released over the time course of decomposition are driven by deterministic rather than stochastic processes. Individual cadaveric volatile organic compounds were correlated with specific taxa during the first stages of decomposition which are dominated by bacteria. Through best‐fitting multiple linear regression models, the synthesis of acetic acid, indole and phenol could be linked to the activity of Enterobacteriaceae, Tissierellaceae and Xanthomonadaceae, respectively. These conclusions are also commensurate with the metabolism described for the dominant taxa identified for these families. The predictable nature of in situ synthesis of cadaveric volatile organic compounds by epinecrotic bacteria provides a new basis for future chemical ecology and forensic studies.

Further data

Item Type: Article in a journal
Refereed: Yes
Additional notes: BAYCEER147392
Institutions of the University: Faculties > Faculty of Biology, Chemistry and Earth Sciences
Faculties > Faculty of Biology, Chemistry and Earth Sciences > Department of Biology > Chair Animal Ecology II - Evolutionary Animal Ecology > Chair Animal Ecology II - Evolutionary Animal Ecology - Univ.-Prof. Dr. Sandra Steiger
Research Institutions
Research Institutions > Research Centres
Research Institutions > Research Centres > Bayreuth Center of Ecology and Environmental Research- BayCEER
Result of work at the UBT: No
DDC Subjects: 500 Science
Date Deposited: 08 Apr 2019 12:54
Last Modified: 08 Apr 2019 12:54
URI: https://eref.uni-bayreuth.de/id/eprint/48321