HOME >> BIOLOGY >> NEWS
Pesticide, urbanization linked to frog declines

Though the California red-legged frog recently earned sweeping federal protection from habitat destruction, researchers from UC Davis and California State University, Sacramento, have found new evidence that their decline may also be pesticide-related.

"It's the first time scientists have been able to link a known declining frog species with pesticides," said Carlos Davidson, an environmental studies professor at CSUS. "We found there is a very strong association between declines of red-legged frogs and the amount of agricultural land use upwind from the site. It strongly suggests that windborne agrochemicals may be contributing to the decline."

In a study that encompassed almost all of California, Davidson and co-author H. Bradley Shaffer, a professor at the Center for Population Biology at the University of California, Davis, mapped out the disappearance of red-legged frog populations. Using those geographic patterns they analyzed possible causes of the declines.

Mark Jennings of the U.S. Geological Survey also contributed to the study. Their findings are published in the April issue of the journal Ecological Applications.

The red-legged frog has disappeared from over 70 percent of its historic range in California. It was added to the threatened species list by the U.S. Fish and Wildlife Service in 1996.

To identify historic concentrations of red-legged frogs, Davidson and Shaffer compared museum records of their habitats, dating back to the mid-1800s, with recent survey data. "From the museum specimens we know where the frogs used to be. Recent survey data tells where they are now," Davidson said.

Of the 237 sites they looked at that once had frog populations, 48 percent no longer do.

The researchers looked at several possible causes of the declines, including global warming, ultraviolet radiation, pesticide use and habitat destruction due to urba
'"/>

Contact: H. Bradley Shaffer
hbshaffer@ucdavis.edu
530-752-2939
University of California - Davis
3-Apr-2001


Page: 1 2

Related biology news :

1. Genetic mutations linked to the practice of burning coal in homes in China
2. Enzyme maintaining chromosome ends is linked to bone cancer recurrence, decreased survival
3. Protein involved in childhood disorder linked to cancer
4. Mouse study shows NPAS3 and NPAS1 genes may be linked to psychosis
5. Gene linked to cleft lip and palate identified
6. Schizophrenia gene variant linked to risk traits
7. Gene changes linked to increased eye pressure may have implications for glaucoma therapy
8. Excess levels of nitrogen, phosphorus linked to deformed frogs
9. Genetic mutation linked to more aggressive breast cancer found more often in African-Americans
10. LBP-1a gene mutation linked to disruption of normal fetal development
11. Outcome for acute lymphoblastic leukemia linked to gene expression patterns

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


(Date:4/17/2017)... 2017 NXT-ID, Inc. (NASDAQ: NXTD ) ... of its 2016 Annual Report on Form 10-K on Thursday April ... ... in the Investor Relations section of the Company,s website at ... at http://www.sec.gov . 2016 Year Highlights: ...
(Date:4/11/2017)... N.Y. , April 11, 2017 ... fingerprints, but researchers at the New York University ... College of Engineering have found that partial similarities ... security systems used in mobile phones and other ... thought. The vulnerability lies in the ...
(Date:4/5/2017)... KEY FINDINGS The global market for stem ... 25.76% during the forecast period of 2017-2025. The rise ... growth of the stem cell market. Download ... The global stem cell market is segmented on the ... cell market of the product is segmented into adult ...
Breaking Biology News(10 mins):
(Date:10/12/2017)... ... October 12, 2017 , ... ... analysis platform specifically designed for life science researchers to analyze and interpret ... Rosalind Franklin, who made a major contribution to the discovery of the ...
(Date:10/11/2017)... Palo Alto, CA, USA (PRWEB) , ... October 11, 2017 , ... ... is set to take place on 7th and 8th June 2018 in San Francisco, ... and policy influencers as well as several distinguished CEOs, board directors and government officials ...
(Date:10/11/2017)... Tbilisi, Georgia (PRWEB) , ... October 11, 2017 , ... ... disaster, taking the lives of over 5.5 million people each year. Especially those living ... the greenovative startup Treepex - based in one of the most pollution-affected countries globally ...
(Date:10/10/2017)... ... October 10, 2017 , ... ... company advancing targeted antibody-drug conjugate (ADC) therapeutics, today confirmed licensing rights that ... Polymerized Liposomal Nanoparticle), a technology developed in collaboration with Children’s Hospital Los ...
Breaking Biology Technology:
Cached News: