In:
Integrated Environmental Assessment and Management, Wiley, Vol. 3, No. 2 ( 2007-04), p. 203-210
Abstract:
Ecotoxicological effect factors are part of the analysis of relative impacts by chemical contaminants on ecosystems. Uncertainty distributions, represented by the 90% confidence interval, belonging to ecotoxicological effect factors for freshwater ecosystems were determined. This study includes 869 high production volume chemicals, related to 7 nonspecific toxic modes of action (TMoAs). The ecotoxicological effect factors are divided into a TMoA‐specific part and a chemical‐specific part. The 90% confidence interval of the TMoA‐specific part of the effect factor ranges from 23 orders of magnitude for acrylate toxicity to 2 orders of magnitude for nonpolar narcosis. The range in the TMoA‐specific part of the effect factor is mainly caused by uncertainty in the spread in toxic sensitivity between species (σ j ). Average uncertainty in the chemical‐specific part of the effect factors depends on the number of species tested and ranges on average from a factor of 5 for more than 3 species tested to a factor of about 1,000 for 2 species tested. Average uncertainty in the ecotoxicological effect factors ranges from a factor of 100 for more than 3 species tested to a factor of nearly 10,000 for 2 species tested. It is recommended that the ecotoxicological effect factor of a chemical is based on toxicity data of at least 4 species.
Type of Medium:
Online Resource
ISSN:
1551-3777
,
1551-3793
DOI:
10.1897/IEAM_2006-013.1
Language:
English
Publisher:
Wiley
Publication Date:
2007
detail.hit.zdb_id:
2231760-0
SSG:
21
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