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Temperature variation, bacterial diversity, and fungal infection dynamics in the amphibian skin [Molecular Ecology]

Keywords : 16S rRNA amplicon sequencing, amphibians, Batrachochytrium dendrobatidis, Eleutherodactylus coqui, host-pathogen dynamics, species turnover

par Frédéric Magné - publié le

Host-associated bacterial communities on the skin act as the first line of defense against invading pathogens. Yet, for most natural systems, we lack a clear understanding of how temperature variability affects structure and composition of skin bacterial communities, and in turn, promotes or limits the colonization of opportunistic pathogens. Here, we examine how natural temperature fluctuations might be related to changes in skin bacterial diversity over time in three amphibian populations infected by the pathogenic fungus Batrachochytrium dendrobatidis (Bd). Our focal host species (Eleutherodactylus coqui) is a direct-developing frog that has suffered declines at some populations in the last 20 years, while others have not experienced any changes.(...)

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