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:5/6/2017)... -- RAM Group , Singaporean based technology ... biometric authentication based on a novel  quantum-state ... perform biometric authentication. These new sensors are based on a ... Group and its partners. This sensor will have widespread ... security. Ram Group is a next generation sensor ...
(Date:4/18/2017)... 2017  Socionext Inc., a global expert in SoC-based imaging and ... the M820, which features the company,s hybrid codec technology. A demonstration ... Probe, Inc., will be showcased during the upcoming Medtec Japan at ... the Las Vegas Convention Center April 24-27. ... Click here for an ...
(Date:4/13/2017)... 13, 2017 According to a new market research ... Analytics, Identity Administration, and Authorization), Service, Authentication Type, Deployment Mode, Vertical, and ... is expected to grow from USD 14.30 Billion in 2017 to USD ... 17.3%. ... MarketsandMarkets Logo ...
Breaking Biology News(10 mins):
(Date:10/12/2017)... ... October 12, 2017 , ... The Blavatnik Family ... and six Finalists of the 2017 Blavatnik Regional Awards for Young Scientists. ... and administered by the New York Academy of Sciences to honor the excellence ...
(Date:10/12/2017)... ... October 12, 2017 , ... BioMedGPS announces ... addition of its newest module, US Hemostats & Sealants. , SmartTRAK’s US Market ... hemostats, fibrin sealants, synthetic sealants and biologic sealants used in surgical applications. BioMedGPS ...
(Date:10/11/2017)... ... October 11, 2017 , ... At its national ... Dr. Suneel I. Sheikh, the co-founder, CEO and chief research scientist of Minnesota-based ... selected for membership in ARCS Alumni Hall of Fame . ASTER Labs ...
(Date:10/11/2017)... Alto, CA, USA (PRWEB) , ... October 11, 2017 , ... ... set to take place on 7th and 8th June 2018 in San Francisco, CA. ... policy influencers as well as several distinguished CEOs, board directors and government officials from ...
Breaking Biology Technology: