Nature Communications (Oct 2023)

Over 200,000 kilometers of free-flowing river habitat in Europe is altered due to impoundments

  • Piotr Parasiewicz,
  • Kamila Belka,
  • Małgorzata Łapińska,
  • Karol Ławniczak,
  • Paweł Prus,
  • Mikołaj Adamczyk,
  • Paweł Buras,
  • Jacek Szlakowski,
  • Zbigniew Kaczkowski,
  • Kinga Krauze,
  • Joanna O’Keeffe,
  • Katarzyna Suska,
  • Janusz Ligięza,
  • Andreas Melcher,
  • Jesse O’Hanley,
  • Kim Birnie-Gauvin,
  • Kim Aarestrup,
  • Peter E. Jones,
  • Joshua Jones,
  • Carlos Garcia de Leaniz,
  • Jeroen S. Tummers,
  • Sofia Consuegra,
  • Paul Kemp,
  • Hannah Schwedhelm,
  • Zbigniew Popek,
  • Gilles Segura,
  • Sergio Vallesi,
  • Maciej Zalewski,
  • Wiesław Wiśniewolski

DOI
https://doi.org/10.1038/s41467-023-40922-6
Journal volume & issue
Vol. 14, no. 1
pp. 1 – 15

Abstract

Read online

Abstract European rivers are disconnected by more than one million man-made barriers that physically limit aquatic species migration and contribute to modification of freshwater habitats. Here, a Conceptual Habitat Alteration Model for Ponding is developed to aid in evaluating the effects of impoundments on fish habitats. Fish communities present in rivers with low human impact and their broad environmental settings enable classification of European rivers into 15 macrohabitat types. These classifications, together with the estimated fish sensitivity to alteration of their habitat are used for assessing the impacts of six main barrier types (dams, weirs, sluices, culverts, fords, and ramps). Our results indicate that over 200,000 km or 10% of previously free-flowing river habitat has been altered due to impoundments. Although they appear less frequently, dams, weirs and sluices cause much more habitat alteration than the other types. Their impact is regionally diverse, which is a function of barrier height, type and density, as well as biogeographical location. This work allows us to foresee what potential environmental gain or loss can be expected with planned barrier management actions in rivers, and to prioritize management actions.