Forum for Science, Industry and Business

Sponsored by:     3M 
Search our Site:

 

Chernobyl Radiation Fells Female Birds, Making Chirping More Frequent From Lonely Males

20.04.2012
Birdsong is one of the joys of nature, but higher percentages of birds chirping near Chernobyl are a perverse indication of radiation contamination, according to a new study.

An international team of researchers studied gender abundances and singing behavior in birds from eight areas with varying levels of radiation contamination near Chernobyl, Ukraine, the center of the catastrophe that began with an explosion in a nuclear power plant on April 26, 1986.

The results, published in PLoS One, were clear: higher levels of contamination went hand-in-hand with greater male-to-female ratios.

"We're seeing higher mortalities for females than males, reflecting the increased costs of reproduction in these stressful environments," said co-author Timothy Mousseau, a professor of biological sciences in the College of Arts and Sciences at the University of South Carolina. Male bird mortality also increased with background radiation levels, he added, but the female susceptibility to contamination was far stronger.

Counting the number of birds singing in each area, the researchers found that the percentage chirping was higher in the more contaminated areas. Given the relative dearth of females in those areas, the team concluded that lonely bachelors were spending more time calling out for mates.

That observation means that some earlier Chernobyl data might beg an even more stark interpretation. "When we did the original censuses, the standard method for doing a bird count is birds that you can either see or hear," Mousseau said. "So our early estimates of abundance were probably overestimates in the contaminated areas."

The data also showed higher percentages of yearlings, rather than more mature birds, in the areas of higher contamination. "It's what we've seen for many years now," said Mousseau, the director of the Chernobyl Research Initiative at USC, which has sponsored studies on the long-term ecological and health consequences of the Chernobyl disaster since 1998, including many collaborations with this paper's co-author Anders Møller of the CNRS in France. "Within the Chernobyl zone, it's very heterogeneous – where the contamination levels are high, there are far fewer birds."

The team captured and examined birds to determine their sex in regions with background radiation ranging from 0.02 to 138 micro-Sv per hour (0.02 to 0.05 micro-Sv per hour are normal background radiation levels in the northern Ukraine).

Steven Powell | Newswise Science News
Further information:
http://www.sc.edu

More articles from Studies and Analyses:

nachricht Real-time feedback helps save energy and water
08.02.2017 | Otto-Friedrich-Universität Bamberg

nachricht The Great Unknown: Risk-Taking Behavior in Adolescents
19.01.2017 | Max-Planck-Institut für Bildungsforschung

All articles from Studies and Analyses >>>

The most recent press releases about innovation >>>

Die letzten 5 Focus-News des innovations-reports im Überblick:

Im Focus: Breakthrough with a chain of gold atoms

In the field of nanoscience, an international team of physicists with participants from Konstanz has achieved a breakthrough in understanding heat transport

In the field of nanoscience, an international team of physicists with participants from Konstanz has achieved a breakthrough in understanding heat transport

Im Focus: DNA repair: a new letter in the cell alphabet

Results reveal how discoveries may be hidden in scientific “blind spots”

Cells need to repair damaged DNA in our genes to prevent the development of cancer and other diseases. Our cells therefore activate and send “repair-proteins”...

Im Focus: Dresdner scientists print tomorrow’s world

The Fraunhofer IWS Dresden and Technische Universität Dresden inaugurated their jointly operated Center for Additive Manufacturing Dresden (AMCD) with a festive ceremony on February 7, 2017. Scientists from various disciplines perform research on materials, additive manufacturing processes and innovative technologies, which build up components in a layer by layer process. This technology opens up new horizons for component design and combinations of functions. For example during fabrication, electrical conductors and sensors are already able to be additively manufactured into components. They provide information about stress conditions of a product during operation.

The 3D-printing technology, or additive manufacturing as it is often called, has long made the step out of scientific research laboratories into industrial...

Im Focus: Mimicking nature's cellular architectures via 3-D printing

Research offers new level of control over the structure of 3-D printed materials

Nature does amazing things with limited design materials. Grass, for example, can support its own weight, resist strong wind loads, and recover after being...

Im Focus: Three Magnetic States for Each Hole

Nanometer-scale magnetic perforated grids could create new possibilities for computing. Together with international colleagues, scientists from the Helmholtz Zentrum Dresden-Rossendorf (HZDR) have shown how a cobalt grid can be reliably programmed at room temperature. In addition they discovered that for every hole ("antidot") three magnetic states can be configured. The results have been published in the journal "Scientific Reports".

Physicist Dr. Rantej Bali from the HZDR, together with scientists from Singapore and Australia, designed a special grid structure in a thin layer of cobalt in...

All Focus news of the innovation-report >>>

Anzeige

Anzeige

Event News

Booth and panel discussion – The Lindau Nobel Laureate Meetings at the AAAS 2017 Annual Meeting

13.02.2017 | Event News

Complex Loading versus Hidden Reserves

10.02.2017 | Event News

International Conference on Crystal Growth in Freiburg

09.02.2017 | Event News

 
Latest News

Stingless bees have their nests protected by soldiers

24.02.2017 | Life Sciences

New risk factors for anxiety disorders

24.02.2017 | Life Sciences

MWC 2017: 5G Capital Berlin

24.02.2017 | Trade Fair News

VideoLinks
B2B-VideoLinks
More VideoLinks >>>