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<p>The extensive development of hydropower has significantly impacted Austria's river ecosystems over the last decades, leading to substantial habitat degradation for fish populations. This decline is exacerbated by a range of other human pressures including river channelization, climate change, pollutants, and navigation. As a result, species once prevalent, such as the Danube salmon, are now at the brink of extirpation. Former mass species such as nase and barbel have also seen significant reductions in distribution area and stock sizes. Currently, about two-thirds of native fish species in Austria are listed on the Red List of threatened species. To counteract these trends, it is imperative to preserve the remaining free-flowing rivers. Furthermore, it is crucial to mitigate all other impacts as well as to implement all ecologically effective measures at hydropower plants to avoid extirpation of fish species in Austria.</p>

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Beitrag einer nachhaltigen Wasserkraft zum Schutz der Fische

  • 期刊论文

  • 发表日期：

    2025年1月2日

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  • Stefan Schmutz,
  • Thomas Friedrich,
  • Franz Greimel,
  • Daniel S. Hayes,
  • Mathias Jungwirth,
  • Susanne Muhar,
  • Kurt Pinter,
  • Carina Seliger,
  • Günther Unfer,
  • Bernhard Zeiringer

摘要

The extensive development of hydropower has significantly impacted Austria's river ecosystems over the last decades, leading to substantial habitat degradation for fish populations. This decline is exacerbated by a range of other human pressures including river channelization, climate change, pollutants, and navigation. As a result, species once prevalent, such as the Danube salmon, are now at the brink of extirpation. Former mass species such as nase and barbel have also seen significant reductions in distribution area and stock sizes. Currently, about two-thirds of native fish species in Austria are listed on the Red List of threatened species. To counteract these trends, it is imperative to preserve the remaining free-flowing rivers. Furthermore, it is crucial to mitigate all other impacts as well as to implement all ecologically effective measures at hydropower plants to avoid extirpation of fish species in Austria.