First derivation of predicted-no-effect values for freshwater and terrestrial ecosystems exposed to radioactive substances
Résumé
The FASSET Radiation Effects Database (FRED) constitutes a unique structured resource of the biological effects of ionizing radiation on non-human species mainly from temperate ecosystems, encompassing 26,000 primary data entries. Quality-assessed data were extracted from FRED and dose-effect relationships were constructed to provide estimates of ED50 and EDR10. These estimates are Doses (or Dose Rates) related to the percent change in the average level of the endpoint for a particular effect (50% or 10% for acute or chronic exposure regimes, respectively). Acute and chronic Species Sensitivity Distributions (SSDs) were built on the basis of these data sets, and the Assessment Factor Method (AFM) was applied when data were too scarce. The Hazardous Dose corresponding to 5% of species acutely affected at the 50% effect level varied from 1 to 5.5 Gy according to the ecosystem. For chronic γ external irradiation exposure, no-effect values varied from 10 μGy/h for freshwaters through application of the AFM to 67 μGy/h for terrestrial ecosystems, corresponding to the 5th percentile of the non-weighted SSD (vs 229 μGy/h when trophic weights are applied). These values are higher by ca. ×50 to ×100 than the upper bound of natural background, and lower than dose rates triggering effects at individual levels on contaminated sites. © 2006 American Chemical Society.
Mots clés
Contamination
Ecosystems
Environmental impact
Ionizing radiation
Radioactive wastes
Assessment Factor Method (AFM)
Chronic exposure
External irradiation exposure
Species Sensitivity Distributions (SSD)
Pollution detection
radioactive material
Contamination
assessment method
data set
freshwater ecosystem
radiation damage
radioactive pollution
temperate environment
terrestrial ecosystem
article
asessment factor method
data base
ecosystem
environmental monitoring
fasset radiation effects database
freshwater environment
ionizing radiation
land biome
radiation dose
radiation exposure
sensitivity analysis
technique
Algae
Amphibia
Animals
Daphnia
Dose-Response Relationship
Radiation
Ecosystem
Fishes
Fresh Water
Radiation Monitoring
Ionizing
Radioactive Waste
Soil Pollutants
Radioactive
Water Pollutants