Strategien zur Sedimentbewertung – ein Überblick

A combined hydraulic and toxicological approach to assess re-suspended sediments during simulated flood events. Part I–multiple biomarkers in rainbow trout

“…Two additional experiments either with unspiked sediment or without sediment, respectively, served as references without PAHs. PAH concentrations were chosen according to previously determined concentrations in sediments of German rivers and streams (e.g., Hollert et al 2009;Keiter et al 2008). Control groups of fish were taken from a maintenance stock and assessed in parallel to the experimental animals to establish untreated baseline values for the biological endpoints investigated in this study.…”

Linking Ah receptor mediated effects of sediments and impacts on fish to key pollutants in the Yangtze Three Gorges Reservoir, China — A comprehensive perspective

“…Moreover, aspects like bioavailability of the toxic compounds, their synergistic and antagonistic effects, as well as the metabolism in the organisms are not taken into account. Thus, in order to acknowledge the complex situation in the field a holistic assessment in environmental monitoring is demanded, that considers not only the concentrations of selected compounds, but integrates them with the toxic effects the environmental sample may induce (Brils, 2008;Heugens et al, 2001;Hollert et al, 2007Hollert et al, , 2009Malaj et al, 2014;SedNet, 2004;Wernersson et al, 2015). One approved holistic assessment method is the triad approach by Chapman (1990), with in situ investigations of biomarkers in fish suggested as additional line of evidence (Chapman and Hollert, 2006).…”

Toxizität und Risk Assessment fluvialer Sedimente und Schwebstoffe: Eine kurze Übersicht bisheriger und neuerer Entwicklungen

“…In order to ensure that the actual bioaccessibility of sediment contaminants is sufficiently considered, bioassays using direct sediment contact exposure were applied in different exposure scenarios (Hollert et al 2003b). However, since sediment contact assays with whole organisms usually provide only acute (mortality) and chronic toxicity data, it has become necessary to utilize more specific mechanism-based bioassays (e. g. mutagenic, genotoxic, teratogenic, dioxin-like, and estrogenlike responses, Hollert et al 2009). In this way, research on sediment toxicity can gain more comprehensive insights into the ecotoxicological hazard potential of sediments.…”

“…It comprised 13 research projects geared towards an interdisciplinary approach for investigating the redistribution of Fig. 2 (a) Methodology of bioassay-directed fractionation of toxicants from complex environmental samples (redrawn from Brack 2003) and (b) conceptual combination of the Sediment Quality Triad (SQT) according to Chapman et al (1990) and bioassay-directed fractionation techniques (Brack 2003;Hollert et al 2009) to identify single substances causing effects in the environment (redrawn from Hecker and Hollert 2009) contaminated sediments and the re-mobilization of nutrients and pollutants into the water column as a consequence of hydrodynamic processes in rivers and estuaries. The gained data revealed that it is inevitable to consider erosion stability of the sediment bed in the implementation of the WFD and other comprehensive management concepts of other catchment areas.…”