Figure 1

Longitudinal profile of the Rhône River from Lake Geneva to the Mediterranean Sea (540 km). Locations of the hydroelectric power schemes and river sections from A to T (i.e., A-GE to T-PA, see Supplementary Table 1 for the associated names). Locations of the confluence points with the main tributaries (and names of the five most important). Box: locations of the 59 eDNA samples (in red) and 40 TEF long-term surveys (in blue).