Fig. 5


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RDA–analyses for a) environmental and habitat variables, and b) anthropogenic pressures. Abbreviated names refer to the following variables: cond: conductivity (µS/cm), dmean: mean depth (m), dmax: maximum depth (m), temp: water temperature (°C), wwidth: wetted width (m), helophytes: % cover of helophytes, slope: Slope (‰), velocity: average river velocity (average m/sec classes), D.O.: Dissolved oxygen (mg/l). hydropeak: Water level hydropeaking (below hydroelectric power plants), barr ds: Artificial barriers Upstream, barr ds: Artificial barriers downstream, chann: River channelization, imp: Impoundment due to barriers and dams, hydro mod: Hydrograph modification, wat abstr: Water abstraction, poll obs: Pollution observed visually on-site.

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