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:1/23/2020)... ... 23, 2020 , ... GIOSTAR/HEAMGEN has developed and ... The red blood cells are made utilizing a bioreactor that permits the ... and replaces the need for a human blood donor. GIOSTAR/HEAMGEN mature ...
(Date:1/22/2020)... MESA, Calif. (PRWEB) , ... January 21, 2020 ... ... of Robert Pozil to lead the company’s new Business Development Department. The move, ... 2019. Mr. Pozil had been previously serving as the company’s Senior Vice President ...
(Date:1/10/2020)... ... January 09, 2020 , ... Cutting Edge Spine, a leader ... clearance and commercial launch of the latest addition to its bioactive portfolio of ... is made of PEEK-OPTIMA HA Enhanced material supplied by Invibio Biomaterial Solutions. Cutting ...
Breaking Biology News(10 mins):
(Date:1/7/2020)... (PRWEB) , ... January 06, 2020 , ... ... a Digital World at The Fletcher School at Tufts University, is pleased to ... Foundation. The grant will be administered by Tufts University, and will help to ...
(Date:1/7/2020)... ... 06, 2020 , ... ABCT , the Accelerator for ... to participate in the annual program. Twelve ventures will participate in the 6.5-month-long ... network. All startups will receive an entrepreneur coach, access to active business professionals ...
(Date:12/31/2019)... ... 2019 , ... At this year's SLAS conference, Visikol will present several talks ... 3D cell culture , advanced imaging and multiplex analysis . Specifically, ... steatosis , inflammation and fibrosis as well as a 2D cell culture ...
(Date:12/27/2019)... ... December 27, 2019 , ... Leak Detection ... for the Pharmaceutical, Biotechnology, Medical Device and Food Packaging Industries is excited to ... Following acquisition by CLJ Holdings in February, 2019, a comprehensive and aggressive reorganization ...
Breaking Biology Technology:
Cached News: