Fig. 3


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(a) Cumulative frequency of the three ecological guilds with the shaded area corresponding to the first three years of monitoring common to the three FW and (b) cumulative frequency of captured individuals per species (belonging to the three guilds only) in the Berwinne (FW1-B), Amblève (FW2-A) and Ourthe River (FW3-O) according to the monitoring days.

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