In parallel with a renewed interest in nuclear power and its possible environmental impacts, a new environmental radiation protection system calls for environmental indicators of radiological stress. However, because environmental stressors seldom occur alone, this study investigated the combined effects of an ecological stressor (larval density) and an anthropogenic stressor (ionizing radiation) on amphibians. Scaphiopus holbrookii tadpoles reared at different larval densities were exposed to four low irradiation dose rates (0.13, 2.4, 21, and 222mGyd -1) from 137Cs during the sensitive period prior to and throughout metamorphosis. Body size at metamorphosis and development rate served as fitness correlates related to population dynamics. Results showed that increased larval density decreased body size but did not affect development rate. Low dose rate radiation had no impact on either endpoint.
|Number of pages||5|
|Journal||Ecotoxicology and Environmental Safety|
|State||Published - May 1 2012|
Bibliographical noteFunding Information:
This study was financed by the Savannah River Ecology Laboratory's Education Program, the L. Namowitsky's Foundation, the Swedish Radiation Protection Authority (SSI), and the U. S. Department of Energy under Award Number DE-FC09-96SR18546 and FC09-07SR22506 to the University of Georgia Research Foundation.
- Cs exposure
- Larval density
- Low dose rate
- Multiple stressors
- Radiation effects
- Scaphiopus holbrookii
ASJC Scopus subject areas
- Public Health, Environmental and Occupational Health
- Health, Toxicology and Mutagenesis