HOME >> BIOLOGY >> NEWS
Amphibian mortality linked to global climate change

For the first time, researchers have identified a direct link between global climate change and local factors that cause the death of amphibian eggs in the wild, according to a paper to be published in the 5 April issue of the journal Nature.

Scientists have been trying to determine why amphibian populations worldwide have been declining at alarming rates since the late 1970s, but their research has pointed to a confusing variety of causes. Now Joseph Kiesecker, professor of biology at Penn State, reports the research team he leads has shown that global warming causes changes in rainfall patterns, causing stress in moisture-sensitive amphibians, leaving them susceptible to a variety of pathogens. The specific stresses and specific resulting causes of death depend on the specific conditions in the animals' local habitat.

Kiesecker's team found a direct link between the Southern Oscillation Index, which tracks temperature fluctuations including the El Nio warming cycles in the South Pacific, and the amount of rain or snow in Oregon's Cascade Mountains. Other members of the team include Andrew R. Blaustein and Lisa K. Belden, of Oregon State University.

"For over 10 years, we have been collecting data at a number of sites in the Cascades, 4,000 to 7,000 feet above sea level, where there are large breeding populations of western toads," says Kiesecker, whose team backpacks for 10 miles to reach some of the remote sites. The researchers work in tents for weeks to build their experimental devices, which include boxes they designed to anchor the toad eggs at different distances below the surface of the lake in order to learn whether a thicker blanket of water better protects the eggs from the damaging effect of ultraviolet radiation. "We have found that water levels are shallower during years when there is less snow, which exposes the eggs to more ultraviolet light and makes them susceptible to disease outbreaks," says Kiesecker.

In early s
'"/>

Contact: Barbara K. Kennedy
science@psu.edu
814-863-4682
Penn State
4-Apr-2001


Page: 1 2 3

Related biology news :

1. Amphibians life stages influence contaminant transfer from aquatic to terrestrial environments
2. Amphibians and crippling parasites
3. Amphibian mortality linked to climate change
4. Amphibian declines and deformities: what is the latest?
5. Amphibian declines complicated, disturbing
6. Amphibian Revival: Build It And They Will Come
7. Secretary Babbitt To Visit Smokies To Learn More Of Scientific Amphibian Project And Declining Frog And Toad Populations
8. At Last, Zoologists May Know What Is Killing The Worlds Amphibians
9. USGS Responds to Amphibian Declines With Program In Great Smokey Mountains National Park
10. Increasing Threat Of Extinction For Amphibians? Scientists To Seek Answers At NSF Workshop
11. Amphibian Mortality Due To UV Radiation

Post Your Comments:
*Name:
*Comment:
*Email:


(Date:3/27/2021)... ... March 25, 2021 , ... Phlexglobal announced ... Planet Group, has selected Phlexglobal and its innovative regulatory SaaS software, PhlexSubmission, as ... a comprehensive review of five regulatory software companies, with the review team including ...
(Date:3/27/2021)... ... 25, 2021 , ... The 2021 Virtual Conference on Clinical Trial Supply-Europe ... More and more, clinical trial supply conferences are featuring speakers and forums that ... Asymmetrex’s founder and CEO, James L. Sherley, M.D., Ph.D., presented a talk ...
(Date:3/23/2021)... ... March 23, 2021 , ... G-CON Manufacturing (G-CON), the ... by Matica Biotechnology (Matica Bio), a contract development and manufacturing organization (CDMO) specializing ... the cleanroom build out for its new GMP production facility in College Station, ...
Breaking Biology News(10 mins):
(Date:3/27/2021)... ... March 24, 2021 , ... ... Life Sciences and Healthcare firms of all sizes, adds depth to its team ... specialist. Pardillo, who earned his doctorate in computational chemistry from Florida International University ...
(Date:3/27/2021)... ... March 24, 2021 , ... ABI Wellness, ... and reporting approach designed under CEO Mark Watson, today announced a webinar dedicated ... featuring guest speakers Dr. Cameron Clark, Neuropsychologist and Founder of Sharp Thinking, and ...
(Date:3/27/2021)... ... ... The Xtalks editorial team is pleased to announce the launch of the ... joined by editorial team members Ayesha Rashid, Sydney Perelmutter and Mira Nabulsi to discuss ... including insights from industry experts. , The Xtalks Life Science podcast will feature ...
(Date:3/23/2021)... Conn. (PRWEB) , ... March 23, 2021 , ... ... develops solutions for characterizing microbiome populations down to the strain level, recently unveiled ... applications. , Not all microbes are created equal: some are easy to ...
Breaking Biology Technology:
Cached News: