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Environmental Sciences Europe
Fig. 1 | Environmental Sciences Europe

Fig. 1

From: The hierarchy of multiple stressors’ effects on benthic invertebrates: a case study from the rivers Erft and Niers, Germany

Fig. 1

Sampling sites in the catchments of the river Erft and Niers. Sampling sites are located in the river Erft (dots) and the river Niers (triangles) in North Rhine-Westphalia (NRW), western Germany. Map colour corresponds to the elevation profile with green colours indicating lowlands and brown colours indicating low mountain ranges (artificial minimum of -299 m in mining area, natural range 9 m to 843 m above sea level). Colour of sampling sites show the stream types according to the German river typology for the EU WFD [43, 44] (©Data licence Germany-Zero-Version 2.0)

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