Navigation Links
Fukushima's legacy
Date:8/14/2014

Following the 1986 Chernobyl nuclear power plant meltdown, biological samples were obtained only after extensive delays, limiting the information that could be gained about the impacts of that historic disaster. Determined not to repeat the shortcomings of the Chernobyl studies, scientists began gathering biological information only a few months after the disastrous meltdown of the Fukushima Daiichi power plant in Japan in 2011. Results of these studies are now beginning to reveal serious biological effects of the Fukushima radiation on non-human organisms ranging from plants to butterflies to birds.

A series of articles summarizing these studies has now been published in the Journal of Heredity. These describe widespread impacts, ranging from population declines to genetic damage to responses by the repair mechanisms that help organisms cope with radiation exposure.

"A growing body of empirical results from studies of birds, monkeys, butterflies, and other insects suggests that some species have been significantly impacted by the radioactive releases related to the Fukushima disaster," stated Dr. Timothy Mousseau of the University of South Carolina, lead author of one of the studies.

Most importantly, these studies supply a baseline for future research on the effects of ionizing radiation exposure to the environment.

Common to all of the published studies is the hypothesis that chronic (low-dose) exposure to ionizing radiation results in genetic damage and increased mutation rates in reproductive and non-reproductive cells.

One of the studies (Hayashi et al. 2014) documented the effects of radiation on rice by exposing healthy seedlings to low-level gamma radiation at a contaminated site in Fukushima Prefecture. After three days, a number of effects were observed, including activation of genes involved in self-defense, ranging from DNA replication and repair to stress responses to cell death.

"The experimental design employed in this work will provide a new way to test how the entire rice plant genome responds to ionizing radiation under field conditions," explained Dr. Randeep Rakwal of the University of Tsukuba in Japan, one of the authors of the study.

Another team of researchers (Taira et al. 2014) examined the response of the pale grass blue butterfly, one of the most common butterfly species in Japan, to radiation exposure at the Fukushima site. They found size reduction, slowed growth, high mortality and morphological abnormality both at the Fukushima site and among laboratory-bred butterflies with parents collected from the contaminated site.

Multiple sources of exposure were included in the butterfly study. "Non-contaminated larvae fed leaves from contaminated host plants collected near the reactor showed high rates of abnormality and mortality," explained Dr. Joji Otaki of the University of the Ryukyus in Okinawa, Japan. Some of their results suggested the possible evolution of radiation resistance in Fukushima butterflies as well.

A review of genetic and ecological studies for a range of other species at both Chernobyl and Fukushima (Mousseau 2014) revealed significant consequences of radiation. Population censuses of birds, butterflies, and cicadas at Fukushima showed major declines attributable to radiation exposure. Morphological effects, such as aberrant feathers on barn swallows, were also observed. The authors suggest that long-term studies at Chernobyl could predict likely effects in the future at the Fukushima site.

All of these studies highlight the need for early and ongoing monitoring at sites of accidental radiation release. "Detailed analyses of genetic impacts to natural populations could provide the information needed to predict recovery times for wild communities at Fukushima as well as any sites of future nuclear accidents," Mousseau said. "There is an urgent need for greater investment in basic scientific research of the wild animals and plants of Fukushima."


'/>"/>

Contact: Nancy Steinberg
nsteinberg@charter.net
541-961-3459
American Genetic Association
Source:Eurekalert  

Related biology news :

1. Reminders of mortality increase concern for environmental legacy
2. Bloombergs health legacy: Urban innovator or meddling nanny?
3. Long-lived breast stem cells could retain cancer legacy
4. Technofossils -- an unprecedented legacy left behind by humans
5. Genetic legacy of rare dwarf trees is widespread
6. How to protect an American wildlife legacy
Post Your Comments:
*Name:
*Comment:
*Email:
Related Image:
Fukushima's legacy
(Date:6/14/2017)...  IBM (NYSE: IBM ) is introducing several innovative ... to developing collaboration between startups and global businesses, taking place ... the event, nine startups will showcase the solutions they have ... France is one ... a 30 percent increase in the number of startups created ...
(Date:5/16/2017)... 2017   Bridge Patient Portal , an ... MD EMR Systems , an electronic medical record ... have established a partnership to build an interface ... GE Centricity™ products, including Centricity Practice Solution (CPS), ... These new integrations will allow healthcare delivery networks ...
(Date:4/19/2017)... New York , April 19, 2017 ... competitive, as its vendor landscape is marked by the ... the market is however held by five major players ... Safran. Together these companies accounted for nearly 61% of ... of the leading companies in the global military biometrics ...
Breaking Biology News(10 mins):
(Date:10/11/2017)... (PRWEB) , ... October 11, 2017 , ... Disappearing forests ... the lives of over 5.5 million people each year. Especially those living in larger ... startup Treepex - based in one of the most pollution-affected countries globally - decided ...
(Date:10/10/2017)... ... 10, 2017 , ... For the second time in three ... Mentoring Award. Representatives of the FirstHand program travelled to Washington, D.C. Tuesday, October ... US2020’s mission is to change the trajectory of STEM education in America by ...
(Date:10/10/2017)... , ... October 10, 2017 , ... ... of 13 prestigious awards honoring scientists who have made outstanding ... a scheduled symposium during Pittcon 2018, the world’s leading conference and exposition for ...
(Date:10/9/2017)... (PRWEB) , ... October 09, ... ... published on October 5, 2017, in the medical journal, Epilepsia, Brain Sentinel’s ... the gold standard, video EEG, in detecting generalized tonic-clonic seizures (GTCS) using ...
Breaking Biology Technology: