HOME >> BIOLOGY >> NEWS
Brightly colored birds most affected by Chernobyl radiation

Brightly coloured birds are among the species most adversely affected by the high levels of radiation around the Chernobyl nuclear plant, ecologists have discovered. The findings published online in the British Ecological Society's Journal of Applied Ecology help explain why some species are harder hit by ionising radiation than others.

Dr Anders Mller of the Universit Pierre et Marie Curie and Professor Timothy Mousseau of the University of South Carolina examined 1,570 birds from 57 different species in the forests around Chernobyl at varying distances from the reactor. They found that populations of four groups of birds those whose red, yellow and orange plumage is based on carotenoids, those that laid the biggest eggs, and those that migrated or dispersed the furthest declined more than other species.

The intriguing results centre on the role of antioxidants chemicals that help protect living organisms from the damaging effects of free radicals. Certain activities use up large amounts of antioxidants. These include producing carotenoid-based pigments for feathers, migrating long distances and laying large eggs (birds lay down antioxidants in their eggs, and will deposit larger amounts of antioxidants in larger eggs). Mller and Mousseau hypothesized that because they had fewer antioxidants left to mop up dangerous free radicals, these birds would most adversely affected by exposure to radiation around Chernobyl.

According to Mller and Mousseau: We found that bird species differed in their response to radiation from Chernobyl. The strongest declines in population density with radiation level were found for species with carotenoid-based plumage, long-distance migration and dispersal, and large eggs for their body size. All four of these factors are associated with antioxidant levels, suggesting that reduced antioxidant levels may cause population declines when species are exposed to radiation.

Among the brightly colou
'"/>

Contact: Becky Allen
beckyallen@ntlworld.com
44-012-235-70016
Blackwell Publishing Ltd.
11-Jul-2007


Page: 1 2

Related biology news :

1. Overbearing colored light may reveal a second mechanism by which birds interpret magnetic signals
2. Art and music for the birds
3. What determines the speed at which birds fly?
4. Aphids make chemical weapons to fight off killer ladybirds
5. Study investigates divorce among Galapagos seabirds
6. Duetting birds with rhythm present a greater threat
7. Land conversion and climate threaten land birds
8. Some forest birds can survive in agricultural countryside with limited habitat conservation
9. Tropical birds have slow pace of life compared to northern species, study finds
10. Mother birds engineer their offspring
11. Personality-gene makes songbirds curious

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


(Date:6/3/2016)... , June 3, 2016 ... Management) von Nepal ... und Lieferung hochsicherer geprägter Kennzeichen, einschließlich Personalisierung, ... führend in der Produktion und Implementierung von ... der Ausschreibung im Januar teilgenommen, aber Decatur ...
(Date:6/2/2016)... Perimeter Surveillance & Detection Systems, ... Infrastructure, Support & Other Service  The latest ... comprehensive analysis of the global Border Security market ... of $17.98 billion in 2016. Now: In ... in software and hardware technologies for advanced video surveillance. ...
(Date:5/20/2016)... , May 20, 2016  VoiceIt is excited ... with VoicePass. By working together, VoiceIt ...  Because VoiceIt and VoicePass take slightly different approaches ... increases both security and usability. ... about this new partnership. "This marketing ...
Breaking Biology News(10 mins):
(Date:6/22/2016)... Research and Markets has announced the addition of the ... The global biomarkers market has ... The market is expected to grow at a five-year compound annual ... $50.6 billion in 2015 to $96.6 billion in 2020. ... to 2020) are discussed. As well, new products approved in 2013 ...
(Date:6/22/2016)... 2016   StockNewsNow.com , The Official MicroCap News ... Nader Pourhassan , President & CEO of CytoDyn ... clinical development and potential commercialization of humanized monoclonal antibodies ... to the company,s website (see here: www.CytoDyn.com ). ... th , 2016, at the LD Micro Invitational in ...
(Date:6/22/2016)... --  ViaCyte, Inc. , a privately-held regenerative medicine company ... for the treatment of diabetes in clinical-stage development, today ... 2016, the Global Stem Cell Event, is taking place ... Francisco.    ... Focus Session: Tools for Basic and Applied Stem Cell ...
(Date:6/22/2016)... ... June 22, 2016 , ... ... spotlight on immigrant achievements and contributions to North Texas and the nation, recently ... from the immigrant community to the civic and economic vitality of North Texas. ...
Breaking Biology Technology:
Cached News: