, Volume 52, Issue 3, pp 201-217

Current Issues in Statistics and Models for Ecotoxicological Risk Assessment

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Abstract

A review is given on statistical and modelling issues in ecotoxicology. The issues discussed are:

1. How to estimate an (almost) no effect concentration chemicals in the laboratory.

2. Combining single-species acceptable effect levels to an acceptable effect level for a multi-species ecosystem.

3. The combined effect of exposure to several chemicals.

4. Bioavailability in the natural environment and food-web models.

Most current procedures in setting standards allow the environmental concentration to be above the acceptable effect concentration for a small fraction of the species. It is shown that a considerable part of the fraction of the affected species will suffer a severe effect.