Staff Publications

Staff Publications

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    'Staff publications' is the digital repository of Wageningen University & Research

    'Staff publications' contains references to publications authored by Wageningen University staff from 1976 onward.

    Publications authored by the staff of the Research Institutes are available from 1995 onwards.

    Full text documents are added when available. The database is updated daily and currently holds about 240,000 items, of which 72,000 in open access.

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Record number 325383
Title A freshwater food web model for the combined effects of nutrients and insecticide stress and subsequent recovery
Author(s) Traas, T.P.; Janse, J.H.; Brink, P.J. van den; Brock, T.C.M.; Aldenberg, T.
Source Environmental Toxicology and Chemistry 23 (2004)2. - ISSN 0730-7268 - p. 521 - 529.
Department(s) Aquatic Ecology and Water Quality Management
Alterra - Centre for Water and Climate
Wageningen Environmental Research
Publication type Refereed Article in a scientific journal
Publication year 2004
Keyword(s) waterorganismen - besmetters - eutrofiëring - chloorpyrifos - voedingsstoffen - waterkwaliteit - biomassa - insecticiden - modellen - toxiciteit - aquatische ecosystemen - ecotoxicologie - aquatic organisms - contaminants - eutrophication - chlorpyrifos - nutrients - water quality - biomass - insecticides - models - toxicity - aquatic ecosystems - ecotoxicology - dursban(r) 4e - community - responses - plankton - tributyltin - ecosystems - microcosms - ecology
Categories Environmental Toxicology, Ecotoxicology
Abstract A microcosm experiment that addressed the interaction between eutrophication processes and contaminants was analyzed using a food web model. Both direct and indirect effects of nutrient additions and a single insecticide application (chlorpyrifos) on biomass dynamics and recovery of functional groups were modeled. Direct toxicant effects on sensitive arthropods could be predicted reasonably well using concentration-response relationships from the laboratory with representative species. Model predictions showed that nutrient additions alone caused only small effects on toxicant fate and effects probably due to the relatively high dissipation rate of chlorpyrifos. Enhancement of eutrophication effects by the insecticide was relatively small and seemed to be additive. The recovery of some affected functional groups was hampered in the indoor microcosms due to their isolation from outdoor seed populations. Introducing recolonization scenarios in the model simulated dose-dependent recovery. Recolonization increased the recovering rate after exposure to the pesticide. Modeling can extend the use of microcosms as a link between laboratory and field as this allows the prediction of effects and recovery of ecosystems for concentrations that have not been experimentally tested.
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