Assessing ecological effects of radionuclides: data gaps and extrapolation issues
2004 (English)In: Journal of Radiological Protection, ISSN 0952-4746, E-ISSN 1361-6498, Vol. 24, no 4A, A139-A155 p.Article in journal (Refereed) Published
By inspection of the FASSET database on radiation effects on non-human biota, one of the major difficulties in the implementation of ecological risk assessments for radioactive pollutants is found to be the lack of data for chronic low-level exposure. A critical review is provided of a number of extrapolation issues that arise in undertaking an ecological risk assessment: acute versus chronic exposure regime; radiation quality including relative biological effectiveness and radiation weighting factors; biological effects from an individual to a population level, including radiosensitivity and lifestyle variations throughout the life cycle; single radionuclide versus multi-contaminants. The specificities of the environmental situations of interest (mainly chronic low-level exposure regimes) emphasise the importance of reproductive parameters governing the demography of the population within a given ecosystem and, as a consequence, the structure and functioning of that ecosystem. As an operational conclusion to keep in mind for any site-specific risk assessment, the present state-of-the-art on extrapolation issues allows us to grade the magnitude of the uncertainties as follows: one species to another > acute to chronic = external to internal = mixture of stressors > individual to population > ecosystem structure to function.
Place, publisher, year, edition, pages
2004. Vol. 24, no 4A, A139-A155 p.
ekotoxikologi, förorening, riskbedömning
IdentifiersURN: urn:nbn:se:sh:diva-5761DOI: 10.1088/0952-4746/24/4A/009ISI: 000226750100010PubMedID: 15700703ScopusID: 2-s2.0-12344331314OAI: oai:DiVA.org:sh-5761DiVA: diva2:392680