HOME >> BIOLOGY >> NEWS
Studies dispute ultraviolet effect on amphibian population declines

For several years it has been widely believed that increased ultraviolet-B radiation because of thinning of atmospheric ozone was a major culprit in deforming amphibian offspring and dwindling populations.

Now two new studies cast serious doubt on that assumption, and the lead author of one says the belief could have had negative impacts on efforts to save amphibians.

"All of the concentration on UV might have misdirected our conservation and research priorities," said Wendy Palen, a University of Washington zoology doctoral student.

UV-B, which causes a number of damaging photochemical changes within cells, makes up less than 1 percent of the ultraviolet radiation reaching the Earth's surface. Previous laboratory and field experiments have shown that it causes deformities and increased mortality in amphibian embryos. That finding led some scientists to contend the Earth's thinning ozone layer, which protects the planet from some harmful radiation, might have contributed to declining amphibian populations.

However, Palen said, the previous experiments, both in the laboratory and in the field, dealt with individuals or small groups in carefully prepared settings. A critical limitation of those studies has been in understanding whether results of small-scale experiments are representative of the range of environments amphibians experience in nature.

The new study examined UV-B levels in natural amphibian breeding habitats in Washington and Oregon and found that the amount of dissolved organic matter in the water actually protects most amphibian embryos from harmful levels of UV-B radiation.

The study is published in the November issue of the journal Ecology. Besides Palen, authors are Daniel Schindler, a UW associate zoology professor and Palen's doctoral adviser; Michael Adams, Christopher Pearl and R. Bruce Bury of the U.S. Geological Survey; and Stephen Diamond of the U.S. Environmental Protection Agency. The USGS, th
'"/>

Contact: Vince Stricherz
vinces@u.washington.edu
206-543-2580
University of Washington
5-Dec-2002


Page: 1 2 3

Related biology news :

1. Monkey business: Studies show tiny callimicos have unusual characteristics
2. Studies show success of Mectizan partnerships
3. Studies offer new insight into HIV vaccine development
4. Studies suggest brain injury results from developmental exposure to alcohol, anesthesia, and lead
5. Studies show preventive value of food supplements
6. Studies probe rapid evolution of Chinese tallow trees
7. Studies of rare blood syndrome yield novel route to cancer
8. Studies of spiders silk reveal unusual strength
9. Studies of genes in mice and common worm may accelerate research on blood diseases, cancers
10. Studies offer data on potential impact of Reminyl on caregiver burden in Alzheimers disease
11. Studies: Floyd, other major hurricanes of 99 caused significant changes in nations largest lagoonal estuary

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


(Date:6/5/2020)... ... June 04, 2020 , ... Greffex, a pioneering vaccine and ... of Directors. , “Neil understands the need for a global perspective to make an ... of Greffex. Mr. Bush will serve as an independent, director of the company. , ...
(Date:5/28/2020)... ... May 27, 2020 , ... Today bioinformatics leader hc1® ... uniquely combines lab testing insights and hc1’s exclusive Local Risk Index in a ... safety of employees returning to the workplace. , “Some of the best ways ...
(Date:5/25/2020)... ... May 22, 2020 , ... Oxford Nanopore Technologies is in advanced development of ... that causes COVID-19. , The LamPORE assay is designed to be rapid, ... very large numbers of samples. Hardware and reagents sit outside current, squeezed supply ...
Breaking Biology News(10 mins):
(Date:7/7/2020)... ... July 06, 2020 , ... Bio-IT World has announced ... Bristol-Myers Squibb, the University of Chicago, Massachusetts General Hospital, Mission: Cure, and the ... awards program, highlighting outstanding examples of how technology innovations and strategic initiatives can ...
(Date:7/1/2020)... ... June 30, 2020 , ... ... insights, today announced that the launch of a new clinical diagnostics ... about the tumor microenvironment (TME). , “Flagship’s TissueInsight is a service that ...
(Date:6/28/2020)... ... June 25, 2020 , ... Lumeda Inc. ... cancer, today announced the company has entered a license agreement with Roswell Park ... Lumeda globally exclusive rights to Roswell Park intellectual property surrounding a novel medical ...
(Date:6/23/2020)... ... June 23, 2020 , ... ... complex indoor environments, announced today that Derek Fournier has been appointed CEO and ... of the Board, effective immediately. , “DeCurtis Corporation has been on an ...
Breaking Biology Technology:
Cached News: