Navigation Links
Climate change effects on imperiled Sierra frog examined
Date:12/11/2008

Climate change can have significant impacts on high-elevation lakes and imperiled Sierra Nevada Yellow-legged frogs that depend upon them, according to U.S. Forest Service and University of California, Berkeley, scientists.

Their findings appear in the current issue of the journal "Herpetological Conservation and Biology" where they show how a combination of the shallow lakes drying up in summer and predation by introduced trout in larger lakes severely limits the amphibian's breeding habitat, and can cause its extinction.

"Environmental factors that increase summer drying of small lakes are likely to bring further population decline because the larger lakes are off limits to breeding," said Kathleen Matthews a Forest Service scientist at the Pacific Southwest Research Station and one of the studies authors.

Matthews co-authored the 10-year study with Igor Lacan, of the U.C. Berkeley Department of Environmental Science, Policy and Management, and Krishna Feldman, another Pacific Southwest Research Station scientist. The Forest Service funded the study.

The Sierra Nevada Yellow-legged frog was common in Sierra Nevada high-elevation lakes and slow-moving streams at altitudes ranging from 4,500 to 12,000 feet. But, its range has decreased more than 80 percent in the last 90 years. These lakes and streams were historically fishless, until hybrid trout were introduced.

The researchers studied lakes in Kings Canyon National Park's Dusy Basin that are mostly fed by snowmelt. Climate change models suggest one of the principal effects of climate change on Sierra Nevada water balance will be a decreased snow pack, with more than half of the current snow water equivalent gone by 2090.

Sierra Nevada Yellow-legged frogs need two to four years of permanent water to complete their development so repeated tadpole mortality from lakes drying up in summer leads to population decline. The scientists found the effect to be a distinct mortality mechanism that could become more important in a warmer, drier climate.

In addition, they believe it was unlikely the frogs were historically restricted to small lakes in Dusy Basin as they are today. Larger lakes free of introduced fish would have provided frogs and tadpoles an important refuge in dry years.

The U.S. Fish and Wildlife Service has determined that listing the Sierra Nevada Yellow-legged frog as an endangered species is warranted but precluded.


'/>"/>

Contact: Roland Giller
rgiller@fs.fed.us
510-559-6327
US Forest Service, Pacific Southwest Research Station
Source:Eurekalert

Related biology news :

1. Time running out on coral reefs as climate change becomes increasing threat
2. Climate change setback for acidified rivers
3. Most US organizations not adapting to climate change
4. Biogeography, changing climates and niche evolution
5. Cool idea for efficient climate control wins recognition
6. Key link in how plants adapt to climate discovered by Stanford researchers
7. Getting warmer? Prehistoric climate can help forecast future changes
8. Climate change opens new avenue for spread of invasive plants
9. Alpine rivers hold important clues for preserving biodiversity and coping with climate change
10. Issues at intersection of climate change and health impact global well-being
11. UI researchers help to improve carbon measurements in global climate studies
Post Your Comments:
*Name:
*Comment:
*Email:
(Date:6/2/2016)... 2, 2016   The Weather Company , an IBM ... an industry-first capability in which consumers will be able to ... ask questions via voice or text and receive relevant information ... Marketers have long sought an advertising solution that ... be personal, relevant and valuable; and can scale across millions ...
(Date:6/1/2016)... , June 1, 2016 Favorable ... Election Administration and Criminal Identification to Boost Global Biometrics ... recently released TechSci Research report, " Global Biometrics Market ... Competition Forecast and Opportunities, 2011 - 2021", the global ... by 2021, on account of growing security concerns across ...
(Date:5/20/2016)... , May 20, 2016  VoiceIt is excited ... with VoicePass. By working together, VoiceIt ...  Because VoiceIt and VoicePass take slightly different approaches ... increases both security and usability. ... about this new partnership. "This marketing ...
Breaking Biology News(10 mins):
(Date:6/23/2016)... 23, 2016 On Wednesday, June 22, ... down 0.22%; the Dow Jones Industrial Average edged 0.27% lower ... 2,085.45, down 0.17%. Stock-Callers.com has initiated coverage on the following ... Therapeutics (NASDAQ: NKTR ), Aralez Pharmaceuticals Inc. (NASDAQ: ... BIND ). Learn more about these stocks by accessing ...
(Date:6/23/2016)... , June 22, 2016  Amgen (NASDAQ: ... the QB3@953 life sciences incubator to accelerate ... The shared laboratory space at QB3@953 was created to ... key obstacle for many early stage organizations - access ... the sponsorship, Amgen launched two "Amgen Golden Ticket" awards, ...
(Date:6/22/2016)... NEW YORK , June 22, 2016 /PRNewswire/ ... the growing next generation sequencing (NGS) market include ... adoption of smaller sequencers.  More accessible and affordable ... led to growing demand for consumables including sample ... The Market for Sample Preparation for Next ...
(Date:6/22/2016)... BELLINGHAM, Washington, USA (PRWEB) , ... June 21, 2016 , ... ... — and without cutting into the tissue — promise to enable both compact, wearable ... information and from even deeper under the skin. , Recent work and visionary future ...
Breaking Biology Technology: