NDLI: Predicted mixture toxic pressure relates to observed fraction of benthic macrofauna species impacted by contaminant mixtures.

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Predicted mixture toxic pressure relates to observed fraction of benthic macrofauna species impacted by contaminant mixtures.

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Predicted mixture toxic pressure relates to observed fraction of benthic macrofauna species impacted by contaminant mixtures.

Content Provider	World Health Organization (WHO)-Global Index Medicus
Author	Posthuma, Leo de Zwart, Dick
Description	Country affiliation: Netherlands Author Affiliation: Posthuma L ( Rijks Instituut voor Volksgezondheid en Milieu (Dutch National Institute for Public Health and the Environment), Bilthoven, The Netherlands. leo.posthuma@rivm.nl)
Abstract	Species sensitivity distributions (SSDs) quantify fractions of species potentially affected in contaminated environmental compartments using test species sensitivity data. The present study quantitatively describes associations between predicted and observed ecological impacts of contaminant mixtures, based on monitoring data of benthic macroinvertebrates. Local mixture toxic pressures (multisubstance potentially affected fraction of species [msPAF]) were quantified based on measured concentrations of 45 compounds (eight metals, 16 chlorinated organics, mineral oil, 16 polycyclic aromatic hydrocarbons, four polychlorinated biphenyls), using acute as well as chronic 50%-effective concentration-based SSD-modeling combined with bioavailability and mixture modeling. Acute and chronic toxic pressures were closely related. Generalized linear models (GLMs) were derived to describe taxon abundances as functions of environmental variables (including acute toxic pressure). Acute toxic pressure ranged from 0 to 42% and was related to abundance for 74% of the taxa. Habitat-abundance curves were generated using the GLMs and Monte Carlo simulation. Predicted abundances for the taxa were associated with acute mixture toxic pressure in various ways: negative, positive, and optimum abundance changes occurred. Acute toxic pressure (msPAF) was associated almost 1:1 with the observed fraction of taxa exhibiting an abundance reduction of 50% or more. The findings imply that an increase of mixture toxic pressure associates to increased ecological impacts in the field. This finding is important, given the societal relevance of SSD model outputs in environmental policies.
File Format	HTM / HTML
ISSN	07307268
Issue Number	9
Volume Number	31
e-ISSN	15528618
Journal	Environmental Toxicology and Chemistry
Language	English
Publisher	Wiley
Publisher Date	2012-09-01
Publisher Place	United States
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Models, Theoretical Research Support, Non-u.s. Gov't Environmental Monitoring Toxicity Discipline Environmental Health Metals Discipline Toxicology Linear Models Mineral Oil Polychlorinated Biphenyls Polycyclic Hydrocarbons, Aromatic Drug Effects Journal Article Animals Discipline Chemistry Invertebrates Monte Carlo Method Methods
Content Type	Text
Resource Type	Article
Subject	Environmental Chemistry Health, Toxicology and Mutagenesis

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