Examining transmission of gut bacteria to preserved carcass via anal secretions in Nicrophorus defodiens

Autoři: Christopher James Miller aff001;  Scott Thomas Bates aff002;  Lindsay M. Gielda aff002;  J. Curtis Creighton aff001
Působiště autorů: Department of Biological Sciences, Purdue University Northwest, Hammond, IN, United States of America aff001;  Department of Biological Sciences, Purdue University Northwest, Westville, IN, United States of America aff002
Vyšlo v časopise: PLoS ONE 14(12)
Kategorie: Research Article
doi: 10.1371/journal.pone.0225711


Direct transmission of bacteria to subsequent generations highlights the beneficial nature of host-bacteria relationships. In insects, this process is often mediated by the production of microbe-containing secretions. The objective of this study was to determine if the burying beetle, Nicrophorus defodiens, utilizes anal secretions to transmit adult digestive tract bacteria onto a small vertebrate carcass; thus creating the potential to aid in carcass preservation or pass digestive tract bacteria to their larval offspring. Using high-throughput Illumina sequencing of the 16S rRNA gene, we characterized bacterial communities of adult beetle digestive tracts, their anal secretions, and prepared mouse carcasses. We also examined unprepared carcass bacterial communities as a means to interpret community shifts that take place during carcass preservation. We found a vast reduction in diversity on prepared carcasses after anal secretion application. Overall, there was little similarity in bacterial communities among adult digestive tracts, anal secretions, and prepared carcasses, suggesting bacterial communities found in adult digestive tracts do not successfully colonize and achieve dominance on prepared carcasses by way of beetle anal secretions. We concluded that N. defodiens does not transmit their digestive tract bacterial communities to prepared carcasses in a wholesale manner, but may transmit key microbes, including core microbiome members, to preserved carcasses that may ultimately act to sustain larvae and serve as inocula for larval digestive tracts.

Klíčová slova:

Bacteria – Beetles – Clostridium – DNA extraction – Gastrointestinal tract – Insects – Microbiome – Secretion


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2019 Číslo 12