Figure 1From: 34 years of investigation in the Rhine River at Ludwigshafen, Germany – trends in Rhine fish populationsSchematic map of Germany (a) and the Rhine-Neckar region (b) including the Rhine River site investigated (km 426 – 435). Black – aquatic areas; dark grey – industrialised area; light grey – urbanised area; white – agricultural, nonurban and forest area.Back to article page