Predicted effects of toxicant mixtures are confirmed by changes in fish species assemblages in Ohio, USA, rivers.
Cast your vote
You can rate an item by clicking the amount of stars they wish to award to this item.
When enough users have cast their vote on this item, the average rating will also be shown.
Your vote was cast
Thank you for your feedback
Thank you for your feedback
MetadataShow full item record
TitlePredicted effects of toxicant mixtures are confirmed by changes in fish species assemblages in Ohio, USA, rivers.
PubliekssamenvattingThe purposes of this study were to investigate whether exposure to toxicant mixtures is associated with fish assemblage characteristics in the field and to describe the relationships between predicted chronic and acute mixture risks and observed impacts. Fish abundance and abiotic monitoring data from Ohio, USA, surface waters were compiled and analyzed. Variability of biotic and abiotic parameters was large. Exposure assessment, risk assessment with species-sensitivity distributions, and mixture toxicity rules were used to calculate a relative risk predictor: The multisubstance potentially affected fraction of species (msPAF). Predicted acute and chronic risks ranged from low values to more than 10 and 50% of species potentially affected, respectively. Pearson correlations between predicted risk and observed assemblage characteristics were nonsignificant for total abundance, number of species, Shannon-Weaver index, and evenness. Moderately significant correlations were found between predicted risk and abundance for 23% of individual species. Both abundance increases and decreases were observed. Generalized linear model (GLM) regressions revealed significant nonlinear associations between predicted risk and the abundance for 50% (metals and ammonia) and 55% (household product ingredients) of the species. Local ecological impact was expressed as the fraction of species expected but not observed, both with and without attribution of impact to mixture exposure. The association between predicted impacted fraction and the fraction of species expected but not observed was not significant. Predicted acute and chronic impacted fractions were associated significantly with the observed fraction of species likely lost by the action of toxicant mixtures under field conditions, with wide confidence bounds. These findings confirm the view that higher mixture impacts are expected in the field at higher msPAF.
- Predictive models attribute effects on fish assemblages to toxicity and habitat alteration.
- Authors: de Zwart D, Dyer SD, Posthuma L, Hawkins CP
- Issue date: 2006 Aug
- Predicted mixture toxic pressure relates to observed fraction of benthic macrofauna species impacted by contaminant mixtures.
- Authors: Posthuma L, de Zwart D
- Issue date: 2012 Sep
- Predicting the aquatic risk of realistic pesticide mixtures to species assemblages in Portuguese river basins.
- Authors: Silva E, Daam MA, Cerejeira MJ
- Issue date: 2015 May 1
- Eco-epidemiology of aquatic ecosystems: Separating chemicals from multiple stressors.
- Authors: Posthuma L, Dyer SD, de Zwart D, Kapo K, Holmes CM, Burton GA Jr
- Issue date: 2016 Dec 15
- Water toxicity assessment and spatial pollution patterns identification in a Mediterranean River Basin District. Tools for water management and risk analysis.
- Authors: Carafa R, Faggiano L, Real M, Munné A, Ginebreda A, Guasch H, Flo M, Tirapu L, von der Ohe PC
- Issue date: 2011 Sep 15