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COMMENT ON: APPLYING SPECIES-SENSITIVITY DISTRIBUTIONS IN ECOLOGICAL RISK ASSESSMENT: ASSUMPTION OF DISTRIBUTION TYPE AND SUFFICIENT NUMBER OF SPECIES
Citation:
COMMENT ON: APPLYING SPECIES-SENSITIVITY DISTRIBUTIONS IN ECOLOGICAL RISK ASSESSMENT: ASSUMPTION OF DISTRIBUTION TYPE AND SUFFICIENT NUMBER OF SPECIES. SETAC Press, Pensacola, FL, 2001.
Description:
Newman et al. (2000) addressed some important issues regarding the characterization of species-sensitivity distributions (SSDs) used in ecological risk assessments. A common assumption is that SSDs are log-normal, and this allows data sets to be analyzed by standard parametric methods. . . Developing confidence limits for estimates from censored procedures can be complicated and uncertain. The situation is especially complicated for SSDs because of issues regarding the mix of species in a data set and the existance of both interspecies and intraspecies variability both of which might be effectively addressed in bootstrap samples. Bootstrapping would be useful for this uncertainty analysis, and do a service in advocating its use.