European environmental scenarios of chemical bioavailability in freshwater systems

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

Résultats de recherche: Contribution à un journal/une revueArticle

Résumé

In exposure prediction for environmental risk assessment, the transition to more dynamic and realistic modelling approaches and scenarios has been recently identified as a major challenge, since it would allow a more accurate prediction of bioavailable concentrations and their variations in space and time. In this work, an improved version of the multimedia model ChimERA fate, including a phytoplankton compartment and equations to calculate phytoplankton, detritus and dissolved organic matter variations in time, was developed. The model was parameterized to simulate five dynamic scenarios for shallow meso-eutrophic water bodies based on a latitudinal gradient (in Europe); such scenarios include seasonal profiles of water temperature, phytoplankton biomass, detritus, and dissolved organic matter. Model runs were performed for each scenario for 8 hydrophobic chemicals (PCB congeners), with the aim of investigating the influence of scenario characteristics and compound properties on bioavailable concentrations. The key processes were adsorption/uptake by phytoplankton and deposition to sediment of detritus-bound chemicals. The northern scenarios ("Scandinavia" and "UK") showed the highest bioavailable concentrations, with annual maximum/minimum concentration up to 25; in contrast, for example, maximum concentrations in the "Mediterranean" scenario were lower by a factor of 2 to 9 with respect to the northern ones (depending on chemical hydrophobicity), due to the generally higher biomass and carbon levels, and showed only limited seasonal variability (up to a factor of 4). These results highlight the importance of including biomass and organic carbon dynamics in both modelling approaches and scenarios for the evaluation of exposure concentrations in aquatic environments.

langueAnglais
journalScience of the Total Environment
Les DOIs
étatAccepté/sous presse - 2017

Empreinte digitale

Phytoplankton
bioavailability
phytoplankton
detritus
Biomass
dissolved organic matter
Biological materials
biomass
Water
latitudinal gradient
Polychlorinated Biphenyls
multimedia
hydrophobicity
Hydrophobicity
Organic carbon
prediction
Polychlorinated biphenyls
Risk assessment
aquatic environment
modeling

Citer ceci

Di Guardo, A., Morselli, M., Morabito, G., Semplice, M., Van den Brink, P. J., & De Laender, F. (Accepted/In press). European environmental scenarios of chemical bioavailability in freshwater systems. DOI: 10.1016/j.scitotenv.2016.12.084
Di Guardo, Antonio ; Morselli, Melissa ; Morabito, Giuseppe ; Semplice, Matteo ; Van den Brink, Paul J ; De Laender, Frederik. / European environmental scenarios of chemical bioavailability in freshwater systems. Dans: Science of the Total Environment. 2017
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abstract = "In exposure prediction for environmental risk assessment, the transition to more dynamic and realistic modelling approaches and scenarios has been recently identified as a major challenge, since it would allow a more accurate prediction of bioavailable concentrations and their variations in space and time. In this work, an improved version of the multimedia model ChimERA fate, including a phytoplankton compartment and equations to calculate phytoplankton, detritus and dissolved organic matter variations in time, was developed. The model was parameterized to simulate five dynamic scenarios for shallow meso-eutrophic water bodies based on a latitudinal gradient (in Europe); such scenarios include seasonal profiles of water temperature, phytoplankton biomass, detritus, and dissolved organic matter. Model runs were performed for each scenario for 8 hydrophobic chemicals (PCB congeners), with the aim of investigating the influence of scenario characteristics and compound properties on bioavailable concentrations. The key processes were adsorption/uptake by phytoplankton and deposition to sediment of detritus-bound chemicals. The northern scenarios ({"}Scandinavia{"} and {"}UK{"}) showed the highest bioavailable concentrations, with annual maximum/minimum concentration up to 25; in contrast, for example, maximum concentrations in the {"}Mediterranean{"} scenario were lower by a factor of 2 to 9 with respect to the northern ones (depending on chemical hydrophobicity), due to the generally higher biomass and carbon levels, and showed only limited seasonal variability (up to a factor of 4). These results highlight the importance of including biomass and organic carbon dynamics in both modelling approaches and scenarios for the evaluation of exposure concentrations in aquatic environments.",
author = "{Di Guardo}, Antonio and Melissa Morselli and Giuseppe Morabito and Matteo Semplice and {Van den Brink}, {Paul J} and {De Laender}, Frederik",
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European environmental scenarios of chemical bioavailability in freshwater systems. / Di Guardo, Antonio; Morselli, Melissa; Morabito, Giuseppe; Semplice, Matteo; Van den Brink, Paul J; De Laender, Frederik.

Dans: Science of the Total Environment, 2017.

Résultats de recherche: Contribution à un journal/une revueArticle

TY - JOUR

T1 - European environmental scenarios of chemical bioavailability in freshwater systems

AU - Di Guardo,Antonio

AU - Morselli,Melissa

AU - Morabito,Giuseppe

AU - Semplice,Matteo

AU - Van den Brink,Paul J

AU - De Laender,Frederik

N1 - Copyright © 2016 Elsevier B.V. All rights reserved.

PY - 2017

Y1 - 2017

N2 - In exposure prediction for environmental risk assessment, the transition to more dynamic and realistic modelling approaches and scenarios has been recently identified as a major challenge, since it would allow a more accurate prediction of bioavailable concentrations and their variations in space and time. In this work, an improved version of the multimedia model ChimERA fate, including a phytoplankton compartment and equations to calculate phytoplankton, detritus and dissolved organic matter variations in time, was developed. The model was parameterized to simulate five dynamic scenarios for shallow meso-eutrophic water bodies based on a latitudinal gradient (in Europe); such scenarios include seasonal profiles of water temperature, phytoplankton biomass, detritus, and dissolved organic matter. Model runs were performed for each scenario for 8 hydrophobic chemicals (PCB congeners), with the aim of investigating the influence of scenario characteristics and compound properties on bioavailable concentrations. The key processes were adsorption/uptake by phytoplankton and deposition to sediment of detritus-bound chemicals. The northern scenarios ("Scandinavia" and "UK") showed the highest bioavailable concentrations, with annual maximum/minimum concentration up to 25; in contrast, for example, maximum concentrations in the "Mediterranean" scenario were lower by a factor of 2 to 9 with respect to the northern ones (depending on chemical hydrophobicity), due to the generally higher biomass and carbon levels, and showed only limited seasonal variability (up to a factor of 4). These results highlight the importance of including biomass and organic carbon dynamics in both modelling approaches and scenarios for the evaluation of exposure concentrations in aquatic environments.

AB - In exposure prediction for environmental risk assessment, the transition to more dynamic and realistic modelling approaches and scenarios has been recently identified as a major challenge, since it would allow a more accurate prediction of bioavailable concentrations and their variations in space and time. In this work, an improved version of the multimedia model ChimERA fate, including a phytoplankton compartment and equations to calculate phytoplankton, detritus and dissolved organic matter variations in time, was developed. The model was parameterized to simulate five dynamic scenarios for shallow meso-eutrophic water bodies based on a latitudinal gradient (in Europe); such scenarios include seasonal profiles of water temperature, phytoplankton biomass, detritus, and dissolved organic matter. Model runs were performed for each scenario for 8 hydrophobic chemicals (PCB congeners), with the aim of investigating the influence of scenario characteristics and compound properties on bioavailable concentrations. The key processes were adsorption/uptake by phytoplankton and deposition to sediment of detritus-bound chemicals. The northern scenarios ("Scandinavia" and "UK") showed the highest bioavailable concentrations, with annual maximum/minimum concentration up to 25; in contrast, for example, maximum concentrations in the "Mediterranean" scenario were lower by a factor of 2 to 9 with respect to the northern ones (depending on chemical hydrophobicity), due to the generally higher biomass and carbon levels, and showed only limited seasonal variability (up to a factor of 4). These results highlight the importance of including biomass and organic carbon dynamics in both modelling approaches and scenarios for the evaluation of exposure concentrations in aquatic environments.

U2 - 10.1016/j.scitotenv.2016.12.084

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