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Uncertainties in ecological, chemical and physiological parameters of a bioaccumulation model: implications for internal concentrations and tissue based risk quotients

De Laender, F. and Van Oevelen, D.J. and Middelburg, J.J. and Soetaert, K.E.R. (2010) Uncertainties in ecological, chemical and physiological parameters of a bioaccumulation model: implications for internal concentrations and tissue based risk quotients. Ecotoxicology and Environmental Safety, 73, 240-246. ISSN 0147-6513.

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Official URL: http://dx.doi.org/10.1016/j.ecoenv.2009.11.011

Abstract

Bioaccumulationmodelspredictinternalcontaminantconcentrations(ci) usingecological,chemical and physiologicalparameters.Hereweanalysetheeffectofuncertaintiesontheseparameterson bioaccumulationmodelpredictions.Simultaneouslyconsideringtheuncertaintiesonallthese parametersinabioaccumulationmodelresultedinuncertaintyrangesof ci that increasedwiththe octanolwaterpartitioncoefficient Kow and reachedmaximaofupto1.25logunitsformesozooplankton and upto1.45logunitsfishatlog Kow=8.Aglobalsensitivityanalysis(SA)wasperformedtorankthe contributionofdifferentparameterstotheobserveduncertainty.TheSAdemonstratedthatthis interspeciesdifferenceresultedpredominantlyfromuncertainproductionratesoffish.The Kow, the water concentrationandorganiccarbon–octanolproportionalityconstantwereimportantdriversof uncertaintyon ci for bothspecies.Atissuebasedriskquotient(RQtissue) combininguncertaintyon ci with realistictissuebasedeffectthresholdsindicatedthatfishwereupto10timesmoreprobableto have RQtissue41 thanmesozooplankton,dependingontheconsideredthresholdvalue.Conventional exposurebasedriskquotientswereupto5timeslessprobabletoexceedonethanwerecorresponding RQtissue, andthisforbothspecies

Item Type:Article
Institutes:Nederlands Instituut voor Ecologie (NIOO)
ID Code:6496
Deposited On:01 Jul 2010 02:00
Last Modified:03 Sep 2014 12:23

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