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Distinct Bacterial Microbiomes in Sexual and Asexual Potamopyrgus antipodarum, a New Zealand Freshwater Snail
Journal article   Open access   Peer reviewed

Distinct Bacterial Microbiomes in Sexual and Asexual Potamopyrgus antipodarum, a New Zealand Freshwater Snail

Cristina Takacs-Vesbach, Kayla King, David Van Horn, Katelyn Larkin and Maurine Neiman
PloS one, Vol.11(8), pp.e0161050-e0161050
2016
DOI: 10.1371/journal.pone.0161050
PMCID: PMC5001651
PMID: 27563725
url
https://doi.org/10.1371/journal.pone.0161050View
Published (Version of record) Open Access

Abstract

Different reproductive strategies and the transition to asexuality can be associated with microbial symbionts. Whether such a link exists within mollusks has never been evaluated. We took the first steps towards addressing this possibility by performing pyrosequencing of bacterial 16S rRNA genes associated with Potamopyrgus antipodarum, a New Zealand freshwater snail. A diverse set of 60 tissue collections from P. antipodarum that were genetically and geographically distinct and either obligately sexual or asexual were included, which allowed us to evaluate whether reproductive mode was associated with a particular bacterial community. 2624 unique operational taxonomic units (OTU, 97% DNA similarity) were detected, which were distributed across ~30 phyla. While alpha diversity metrics varied little among individual samples, significant differences in bacterial community composition and structure were detected between sexual and asexual snails, as well as among snails from different lakes and genetic backgrounds. The mean dissimilarity of the bacterial communities between the sexual and asexual P. antipodarum was 90%, largely driven by the presence of Rickettsiales in sexual snails and Rhodobacter in asexual snails. Our study suggests that there might be a link between reproductive mode and the bacterial microbiome of P. antipodarum, though a causal connection requires additional study.
Animals Bacteria - classification Biodiversity Female Helix (Snails) - microbiology Lakes Male Microbiota Monte Carlo Method New Zealand Phylogeny Reproduction, Asexual RNA, Ribosomal, 16S - genetics Symbiosis

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