AmphibiaWeb provides information on amphibian declines, natural history, conservation, and taxonomy.

Species of the Week
Rana sierrae | Sierra Nevada Yellow‐legged Frog

Amphibian News Archive
A study by Ellison et al (2019) investigates the interaction between Batrachochytrium dendrobatidis (Bd), the pathogen that causes the disease chytridiomycosis, and the bacterial skin microbiome of the endangered Sierra Nevada Yellow‐legged frog, Rana sierrae, using both culture‐dependent and culture‐independent methods. The study found that the skin microbiome of highly infected juvenile frogs is characterized by significantly reduced species richness and evenness, and by strikingly lower variation between individuals, compared to juveniles and adults with lower infection levels. In a culture‐dependent Bd inhibition assay, the bacterial metabolites we evaluated all inhibited the growth of Bd. Together, these results illustrate the disruptive effects of Bd infection on host skin microbial community structure and dynamics, and suggest possible avenues for the development of anti‐Bd probiotic treatments.

Current number of amphibian species: 7,974 (Feb 15, 2019) Newly added species