AMPHIBIAWEB






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





Species of the Week:
Brachycephalus pitanga


Amphibian News
In disease dynamics, the "dilution effect" predicts more diverse host communities will have decreased incidence of disease through a complex mix of host-interactions and habitat partitioning. Becker et al (2014) tested this effect of host diversity on chytridiomycosis dynamics with experiments on amphibian host species with a range of traits, from terrestrial to aquatic to arboreal and from multi-species to single species communities. They report that high host diversity led to reduced Bd infection by as much as 66.5 percent less than single species. However, ecological interactions are complex: while one frog, Brachycephalus pitanga, had decreased Bd infections in diverse environments, it may be causing its aquatic neighbors an increase in Bd infections through habitat displacement.

Current number of amphibian species: 7,389 (Feb 28, 2015) Newly added species