Importance of environmental and biomass dynamics in predicting chemical exposure in ecological risk assessment

Melissa Morselli, Matteo Semplice, Frederik De Laender, Paul J. Van den Brink, Antonio Di Guardo

Résultats de recherche: Contribution à un journal/une revueArticle

Résumé

In ecological risk assessment, exposure is generally modelled assuming static conditions, herewith neglecting the potential role of emission, environmental and biomass dynamics in affecting bioavailable concentrations. In order to investigate the influence of such dynamics on predicted bioavailable concentrations, the spatially-resolved dynamic model "ChimERA fate" was developed, incorporating macrophyte and particulate/dissolved organic carbon (POC/DOC) dynamics into a water-sediment system. An evaluation against three case studies revealed a satisfying model performance. Illustrative simulations then highlighted the potential spatio-temporal variability of bioavailable concentrations after a pulsed emission of four chemicals in a system composed of a pond connected to its inflow and outflow streams. Changes in macrophyte biomass and POC/DOC levels caused exposure variations which were up to a factor of 4.5 in time and even more significant (several orders of magnitude) in space, especially for highly hydrophobic chemicals. ChimERA fate thus revealed to be a useful tool to investigate such variations and to identify those environmental and ecological conditions in which risk is expected to be highest.

langue originaleAnglais
Pages (de - à)338-345
Nombre de pages8
journalScience of the Total Environment
Volume526
Les DOIs
étatPublié - 1 sept. 2015

Empreinte digitale

macrophyte
Risk assessment
Biomass
risk assessment
biomass
particulate organic carbon
dissolved organic carbon
inflow
outflow
pond
Ponds
Organic carbon
Dynamic models
Sediments
sediment
simulation
Water
water
chemical
exposure

Citer ceci

Morselli, Melissa ; Semplice, Matteo ; De Laender, Frederik ; Van den Brink, Paul J. ; Di Guardo, Antonio. / Importance of environmental and biomass dynamics in predicting chemical exposure in ecological risk assessment. Dans: Science of the Total Environment. 2015 ; Vol 526. p. 338-345.
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Importance of environmental and biomass dynamics in predicting chemical exposure in ecological risk assessment. / Morselli, Melissa; Semplice, Matteo; De Laender, Frederik; Van den Brink, Paul J.; Di Guardo, Antonio.

Dans: Science of the Total Environment, Vol 526, 01.09.2015, p. 338-345.

Résultats de recherche: Contribution à un journal/une revueArticle

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AU - Semplice, Matteo

AU - De Laender, Frederik

AU - Van den Brink, Paul J.

AU - Di Guardo, Antonio

PY - 2015/9/1

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