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Environmental Sciences Europe
Fig. 2 | Environmental Sciences Europe

Fig. 2

From: Selection and application of trophic magnification factors for priority substances to normalize freshwater fish monitoring data under the European Water Framework Directive: a case study

Fig. 2

Effect of TMF choice on TL 4-normalized mercury concentrations (µg kg−1 ww) in composite samples of whole fish (W) from the rivers Moselle (M) and Havel (H). TMF 4.73: geometric mean for stream ecosystems and Δ15N of 3.4 ‰ [41] recalculated from dw- to ww basis by [14]; TMF 4.31: geometric mean of lake [46, 57] and stream ecosystems [14, 41]; TMF 4.12: geometric mean of lake ecosystems [46, 57]; samples in Moselle and Havel are arranged according to increasing TL; red line: EQS (20 µg kg−1 ww)

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