Navigation Links
OU research team finds a common bioindicator resistant to insecticides
Date:10/28/2013

In a novel study, a University of Oklahoma researcher and collaborators found a common bioindicator, Hyalella azteca, used to test the toxicity of water or sediment was resistant to insecticides used in agricultural areas of central California. The study is the first to demonstrate that the indicator species may adapt to polluted conditions of a habitat and become an entirely unreliable source of information about ecosystem health.

Gary Wellborn, professor of biology in the OU College of Arts and Sciences and director of the Oklahoma Biological Station; Donald P. Weston, University of California, Berkeley; and Helen C. Poyton, University of Massachusetts, Boston; tested cultures in the laboratory and water samples from California lakes, ponds and streams. The Hyalella amphipods are aquatic crustaceans commonly used by scientists and agencies as an indicator species of a healthy, unpolluted environment.

"Our study documented the specific genetic changes that allow the amphipods to survive at 500-times the normal lethal dose of the pesticide," says Wellborn. "The results have far-reaching implications for biomonitoring programs that rely on H. azteca as a bioindicator. H. azteca, a species common across North America, may prove to be an unreliable indicator in other agricultural states where biomonitoring programs use H. azteca as a principal species for monitoring and environmental policy decisions."

Insecticides for agricultural crops are regulated by the Environmental Protection Agency, but runoff during rains can enter a lake, pond or stream and contaminate a non-target species, like H. azteca. The evolution of H. azteca in this study occurred when the species mutated and adapted to the widely used pyrethroid insecticidesa principle known as adaptive evolution. As reported in this study, the resistant H. azteca was no longer reliable as a bioindicator when used to test the toxicity of water and sediment.


'/>"/>

Contact: Jana Smith
jana.smith@ou.edu
405-325-1322
University of Oklahoma
Source:Eurekalert

Related biology news :

1. Dr. Avrum Spira receives award for advancing research on tobacco smokes effect on lungs
2. Researchers discover how cancer invisibility cloak works
3. Oregon researchers say supplement cuts muscle loss in knee replacements
4. BUSM researchers identify molecule that could aid lung cancer detection, treatment
5. USC researcher reveals how to better master stem cells fate
6. Researchers identify gene variant that raises risk for colorectal cancer from eating processed meat
7. Johns Hopkins And Belgian research center to expand health care applications for silicon nanotech
8. USC researcher learns how to break a sweat
9. Researchers show how plants tell the time
10. Berkeley Lab researchers get a detailed look at a DNA repair protein in action
11. Researchers capture images of open channel that moves proteins across cell membranes
Post Your Comments:
*Name:
*Comment:
*Email:
(Date:6/3/2016)... Das DOTM (Department ... hat ein 44 Millionen $-Projekt ... einschließlich Personalisierung, Registrierung und IT-Infrastruktur, an Decatur ... Implementierung von Identitätsmanagementlösungen. Zahlreiche renommierte internationale Anbieter ... aber Decatur wurde als konformste und innovativste ...
(Date:5/24/2016)... Ampronix facilitates superior patient care by providing unparalleled technology to leaders of ... the latest premium product recently added to the range of products distributed by Ampronix. ... ... ... Medical Display- Ampronix News ...
(Date:5/3/2016)... 2016  Neurotechnology, a provider of high-precision biometric ... Biometric Identification System (ABIS) , a complete system ... ABIS can process multiple complex biometric transactions with ... fingerprint, face or iris biometrics. It leverages the ... MegaMatcher Accelerator , which have been used ...
Breaking Biology News(10 mins):
(Date:6/24/2016)... TOKYO , June 24, 2016  Regular discussions on ... to take place between the two entities said Poloz. ... in Ottawa , he pointed to the ... and the federal government. ... Poloz said, "Both institutions have common economic goals, why not ...
(Date:6/23/2016)... ... June 23, 2016 , ... Mosio, a leader in ... Trials Patient Recruitment and Retention Tips.” Partnering with experienced clinical research professionals, Mosio ... practical tips, tools, and strategies for clinical researchers. , “The landscape of how ...
(Date:6/23/2016)... Md. , June 23, 2016 A person ... from the crime scene to track the criminal down. ... the U.S. Food and Drug Administration (FDA) uses DNA evidence ... Sound far-fetched? It,s not. The FDA ... sequencing to support investigations of foodborne illnesses. Put as simply ...
(Date:6/23/2016)... June, 23, 2016  The Biodesign Challenge (BDC), a ... ways to harness living systems and biotechnology, announced its ... in New York City . ... students, showcased projects at MoMA,s Celeste Bartos Theater during ... , MoMA,s senior curator of architecture and design, and ...
Breaking Biology Technology: