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

Species of the Week:
Rana sylvatica

Amphibian News
Scientists have documented that in response to climate change, the timing of breeding has shifting to earlier for many species, but the consequences of this phenomenon for populations and individuals are not known. Bernard (2014) investigated breeding and fecundity in six southern wood frog (Rana sylvatica) populations, and found that warmer winters were associated with earlier breeding in this species, and lower fecundity for females. Earlier breeding also led to slower larval development and changed the timing of metamorphosis to earlier. Changes in the amount of precipitation was not associated with earlier breeding but was correlated with female fecundity. The lower fecundity rates could be caused by increased energy consumption during the warmer winters, but it was unclear why changes in winter precipitation rates were correlated with frog fecundity.

Current number of amphibian species: 7,392 (Mar 4, 2015) Newly added species