Page 1/28 Over 200,000 kilometers of river-ｦsh habitat is lost to impoundments in Europe. Piotr Parasiewicz (  piotr@inｦsh.com.pl ) S. Sakowcz Inland Fisheries Institute https://orcid.org/0000-0003-1672-3759 Kamila Belka European Regional Centre for Ecohydrology of the Polish Academy of Sciences https://orcid.org/0000- 0002-3002-0913 Malgorzata Lapinska European Regional Centre for Ecohydrology Karol Ł awniczak European Regional Centre for Ecohydrology of the Polish Academy of Sciences Pawe ł Prus S. Sakowicz Inland Fisheries Institute Miko ł aj Adamczyk S. Sakowicz Inland Fisheries Institute Pawe ł Buras S. Sakowicz Inland Fisheries Institute Jacek Szlakowski S. Sakowicz Inland Fisheries Institute Zbigniew Kaczkowski European Regional Centre for Ecohydrology of the Polish Academy of Sciences Konga Krause European Regional Centre for Ecohydrology of the Polish Academy of Sciences Joanna O'Keeffe S. Sakowicz Inland Fisheries Institute Katarzyna Suska S. Sakowicz Inland Fisheries Institute Janusz Ligi ę za S. Sakowicz Inland Fisheries Institute Andreas Melcher University of Natural Resources and Life Sciences, Vienna Jesse O'Hanley University of Kent https://orcid.org/0000-0003-3522-8585 Kim Birnie-Gauvin DTU Aqua https://orcid.org/0000-0001-9242-0560