Acta Scientiarum Polonorum
Silvarum Colendarum Ratio et Industria Lignaria

The purpose of the study was to present researchers’ knowledge of the impact of beavers on hydrological conditions in forests. A historical outline, reasons for the drastic decline in the beaver population in Poland and Europe, as well as positive examples of the restoration of the Eurasian beaver population are presented.
The paper provides information given by authors from countries with beaver populations on the impact of these rodents on the natural environment, the way in which it transformed it, as well as threats, losses and benefits of beaver activity brought to man.