Navigation Links
Climate change may alter amphibian evolution
Date:10/25/2012

Most of the more than 6,000 species of frogs in the world lay their eggs in water. But many tropical frogs lay their eggs out of water. This behavior protects the eggs from aquatic predators, such as fish and tadpoles, but also increases their risk of drying out. Justin Touchon, post-doctoral fellow at the Smithsonian Tropical Research Institute, discovered that climate change in Panama may be altering frogs' course of evolution.

By analyzing long-term rainfall data collected by the Panama Canal Authority, Touchon discovered that rainfall patterns are changing just as climate-change models predict.

"Over the past four decades, rainfall has become more sporadic during the wet season," said Touchon. "The number of rainy days decreased, and the number of gaps between storms increased."

The eggs of the pantless treefrog, Dendropsophus ebraccatus, are extremely susceptible to drying. The embryos die within a day when there is no rain. Heavy rains trigger breeding, so as storms become sporadic, the chance of rain within a day of being laid decrease and so does egg survival.

As weather patterns have changed, the advantage of laying eggs out of water has decreased, not only for pantless treefrogs but potentially for many species. "Pantless treefrogs can switch between laying eggs in water or on leaves, so they may weather the changes we are seeing in rainfall better than other species that have lost the ability to lay eggs in water," said Touchon. "Being flexible in where they put their eggs gives them more options and allows them to make decisions in a given habitat that will increase the survival of their offspring."


'/>"/>

Contact: Beth King
kingb@si.edu
202-633-4700
Smithsonian Tropical Research Institute
Source:Eurekalert  

Page: 1

Related biology news :

1. New study will help protect vulnerable birds from impacts of climate change
2. EU-funded study underlines importance of Congo Basin for global climate and biodiversity
3. UNH researchers find African farmers need better climate change data to improve farming practices
4. Fielding questions about climate change
5. Glacier-fed river systems threatened by climate change
6. Beating famine: Sustainable food security through land regeneration in a changing climate
7. Energy requirements make Antarctic fur seal pups vulnerable to climate change
8. Why spring is blooming marvelous (and climate change makes it earlier)
9. Carnegies Greg Asner named Energy/Climate Fellow by US State Department
10. Declines in Caribbean coral reefs pre-date damage resulting from climate change
11. Some corals like it hot: Heat stress may help coral reefs survive climate change
Post Your Comments:
*Name:
*Comment:
*Email:
Related Image:
Climate change may alter amphibian evolution
(Date:7/28/2014)... for Biologically Inspired Engineering at Harvard University today ... commercialized by a newly formed private company to ... medicine products. The announcement follows a ... Development (OTD) and the start-up Emulate Inc., relating ... Organs-on-Chips platform. , "This is a big ...
(Date:7/27/2014)... nicotine and cotinine, a metabolite of nicotine, can potentially ... smoke. , The carcinogen 4-(methylnitrosamino)-1-(3-pyridyl)-1-butanone or NNK is produced ... up in the tobacco smoke. Once inhaled, it is ... activated by a variety of enzymes called Cytochrome P450 ... can partially interfere with the activation of NNK, and ...
(Date:7/27/2014)... mayfly in the southern Western Ghats, a mountain range along ... first time that any mayfly belonging to the genus ... new species, called Labiobaetis soldani , "is named in ... the understanding of the Ephemeroptera of Palaearctic and Oriental realms," ... new mayfly in the Journal of Insect Science . ...
Breaking Biology News(10 mins):Wyss Institute's technology translation engine launches 'Organs-on-Chips' company 2Wyss Institute's technology translation engine launches 'Organs-on-Chips' company 3Nicotine found to inhibit DNA-strand break caused by a certain carcinogen in smoke 2
... senior female family members should play a key role in ... societies. However, they are often overlooked by health organisations that ... as an obstacle to promoting good nutrition and health practices. ... review published in the January issue of Maternal and ...
... This press release is available in German . ... as tsunamis, landslides, and ground settlements, caused a damage of ... the so far highest economic losses due to earthquakes. This ... from the Center for Disaster Management and Risk Reduction Technology ...
... Springer celebrates its 50,000th eBook, available on ... milestone underscores Springer,s position as the largest eBook ... world,s most comprehensive online collection of science, technology ... In addition, as announced in October 2011, ...
Cached Biology News:Research highlights key role grandmothers play in mother and child nutrition and health 2Research highlights key role grandmothers play in mother and child nutrition and health 3Japan and New Zealand were hit hardest by earthquakes 2SpringerLink now offers more than 50,000 eBooks 2
(Date:7/28/2014)... (PRWEB) July 28, 2014 The National ... in Muncie IN, is pleased to announce that it ... National Museum of the United States Air Force. , ... year-long process that concluded this spring with an on-site ... Dayton, OH museum. , The National Museum of ...
(Date:7/25/2014)... 2014 "Ischemic Stroke and Cerebral ... data on the Ischemic Stroke and Cerebral Stroke ... and data relating to the clinical trials on ... global Ischemic Stroke Research Report 2014 at: ... the trial numbers and their recruitment status as ...
(Date:7/25/2014)... -- Trillions of bacteria live in each person,s digestive ... digest food and stave off harmful infections, but their ... To help shed light on the role of these ... professor Eric Alm recently tracked fluctuations in the bacterial ... The findings, described in the July 25 issue of ...
(Date:7/25/2014)... 25, 2014 Research and Markets ... Metabolomics Market 2014-2018" report to their offering. ... Metabolomics or Metabonomics is the scientific study ... a new experimental technique that is being widely ... Metabolites are small molecules that are present in ...
Breaking Biology Technology:AMA’s National Model Aviation Museum Granted Full Civilian Museum Certification by the National Museum of the United States Air Force 2Ischemic Stroke and Cerebral Stroke Global Clinical Trials Review H2, 2014: MarketResearchReports.Biz 2Ischemic Stroke and Cerebral Stroke Global Clinical Trials Review H2, 2014: MarketResearchReports.Biz 3Monitoring the rise and fall of the microbiome 2Monitoring the rise and fall of the microbiome 3Global Metabolomics Market 2014-2018: Key Vendors are Agilent, Bio-Rad, Bruker, Human Metabolome and Metabolon 2
... THE WOODLANDS, Texas, Oct. 4 Lexicon,Pharmaceuticals, Inc. (Nasdaq: ... Ph.D., Lexicon,s president and chief executive officer, will present,at ... Francisco, California,on Thursday, October 11, 2007 at 11:00 a.m. ... may be accessed on its,corporate website at http://www.lexpharma.com ...
... Oct. 4 Genzyme Corp.,(Nasdaq: GENZ ) ... market,Elaprase(R) (idursulfase) in Japan for the treatment of ... by Shire Human Genetic,Therapies Inc., and Genzyme is ... countries under an agreement with Shire. Genzyme intends,to ...
... CLARA, Calif., Oct. 4 Coherent, Inc.,(Nasdaq: COHR ... 2007, it,received an additional NASDAQ Staff Determination letter indicating ... listing,requirements as set forth in Marketplace Rules 4350(e) and ... of stockholders during its fiscal,year ended September 30, 2007. ...
Cached Biology Technology:Lexicon Pharmaceuticals to Present at Bio InvestorForum 2Genzyme Receives Approval to Market Elaprase(R) in Japan 2Genzyme Receives Approval to Market Elaprase(R) in Japan 3Genzyme Receives Approval to Market Elaprase(R) in Japan 4Coherent, Inc. Receives Expected Letter from NASDAQ 2
... The Mini-PROTEAN 3 Dodeca cell with multi-casting ... of up to 12 mini format handcast (8.3 ... cm) gels. The cell requires 3.4-4.4 L of ... cooling coil that attaches to an external refrigerated ...
...
... has been developed to significantly increase the ... Stability is increased at room temperature ... This product is subjected to 0.2 ... azide. This formulation insures consistently high ...
...
Biology Products: