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

Species of the Week:
Rana cascadae

Amphibian News
While Rana cascadae is relatively widespread in montane habitats from northern California into southern British Columbia, declines attributed to the chytrid fungus Batrachochytrium dendrobatidis (Bd) seem focused in northern California populations. Piovia-Smith et al. (Nature 2014) studied virulence of Bd from two lakes suffering declines, finding that isolates from the midst of the decline were more virulent and induced greater mortality of juvenile frogs than Bd isolated from a more stable frog population. In genomic studies, the virulent isolate showed unusual features, including chromosomal differences. Specific genomic and phenotypic features of Bd might account for differences in mortality within species from different localities, as well as differences among species of amphibians.

Current number of amphibian species: 7,365 (Dec 22, 2014) Newly added species