13 Aug 2012:
Shifting Climate Makes Frogs
More Vulnerable to Disease, Study Says
Increasingly unpredictable swings in the weather are making frogs more vulnerable to the deadly chytrid fungus
, according to a new study. In a series of tests, scientists at Oakland University in Michigan exposed
Cuban treefrogs living under a variety of conditions in laboratory incubators to chytridiomycosis, a highly infectious fungal disease that has decimated amphibian species globally
. The scientists found that frogs that were exposed to unpredictable temperature changes were more susceptible to the disease. For example, frogs that were shifted to incubators at a temperature of 15 degrees C (59 degrees F) after spending four weeks at a temperature of 25 C (77 F) were far more likely to suffer infections
than those frogs already accustomed to living at 15 C. According to Thomas Rafell, an Oakland University researcher and lead author of the study, the fungus was likely able to adapt faster to the temperature shift because it is smaller and has a shorter generation time than its host. Field data have shown that harlequin frog populations decline more quickly when monthly temperatures fall suddenly and that these cooling shifts have become more common as a result of climate change, suggesting that this phenomenon is already affecting frogs in the wild. The study was published in the journal Nature Climate Change
Yale Environment 360 is
a publication of the
Yale School of Forestry
& Environmental Studies
Yale Environment 360
articles are now available in Spanish and Portuguese on Universia
, the online educational network. Visit the site.
Business & Innovation
Policy & Politics
Pollution & Health
Science & Technology
Antarctica and the Arctic
Central & South America
The 2015 Yale e360 Video Contest winner documents a Northeastern town's bitter battle over a wind farm. Watch the video.
is now available for mobile devices at e360.yale.edu/mobile
A 2015 Yale e360 Video Contest winner captures stunning images of wild salmon runs in Alaska. Watch the video.
video goes onto the front lines with Colorado firefighters confronting deadly blazes fueled by a hotter, drier climate. Watch the video.
A three-part series Tainted Harvest
looks at the soil pollution crisis in China, the threat it poses to the food supply, and the complexity of any cleanup. Read the series.
Top Image: aerial view of Iceland
. © Google & TerraMetrics.