4.7 Article

Comparative Analysis of Skin Bacterial Diversity and Its Potential Antifungal Function Between Desert and Pine Forest Populations of Boreal Toads Anaxyrus boreas

期刊

MICROBIAL ECOLOGY
卷 84, 期 1, 页码 257-266

出版社

SPRINGER
DOI: 10.1007/s00248-021-01845-1

关键词

Disease ecology; Chytridiomycosis; Skin microbiota; Amphibian; Antifungal

资金

  1. Programa de Apoyo a Proyectos de Investigacion e Innovacion Tecnologica (PAPIIT-UNAM) [IN205521]
  2. UC MEXUS CONACyT [CN 18-127]

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This study compared the skin bacterial diversity and Bd infection levels of A. boreas in one desert population and one pine forest population from Baja California, Mexico. The research found that desert and pine forest toad populations exhibit differences in skin bacterial community structure but show similar Bd infection levels. This suggests that certain bacteria in the skin community may be offering protection from Bd infections in these A. boreas populations.
The skin microbiome in amphibians has gained a lot of attention as some of its members play a protective role against pathogens such as the fungus Batrachochytrium dendrobatidis (Bd). The composition of skin bacterial communities has been suggested as one of the factors explaining differences in susceptibility to Bd among amphibian species and populations. The boreal toad Anaxyrus boreas is known to be susceptible to Bd, and severe population declines in its southeastern range have been documented. However, throughout A. boreas distribution, populations present differences in susceptibility to Bd infections which may be associated with differences in skin microbial diversity. This study compared the skin bacterial diversity and Bd infection levels of A. boreas in one desert population and one pine forest population from Baja California, Mexico. We found that desert and pine forest toad populations exhibit differences in skin bacterial community structure but show similar Bd infection levels. Using a predictive method, we found that the abundance of bacteria with potential Bd-inhibitory properties differed between uninfected and infected individuals but not between populations. Our data suggest that several bacteria in the skin community may be offering protection from Bd infections in these A. boreas populations. This study provides foundational evidence for future studies seeking to understand the skin-microbial variation among boreal toads' populations and its relation with Bd susceptibility.

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