Scholarlink

<p>Following decades of atmospheric acidification, the Bohemian Forest watercourses are now witnessing a remarkable resurgence of natural fish communities. This study presents the most comprehensive ichthyological survey of the region to date, covering 168 watercourse sites across the Czech and Bavarian parts of the Bohemian Forest. Using standardized electrofishing methods, we assessed species composition, density, and the presence of young-of-the-year individuals in relation to environmental characteristics. Fish were detected at 165 sites, with brown trout (<i>Salmo trutta</i>) and bullhead (<i>Cottus gobio</i>) being the dominant species. The widespread occurrence of young-of-the-year individuals indicates successful natural reproduction. Multivariate analyses revealed that fish community structure was significantly influenced by altitude, watercourse morphology, and substrate composition. Species richness increased with watercourse size and habitat heterogeneity. Acidification-sensitive species were found even in high-altitude headwaters, suggesting substantial ecosystem recovery. The near absence of invasive species further supports the high ecological quality of these watercourses. The fish fauna of the Bohemian Forest nowadays reflects the natural recovery of aquatic ecosystems after decades of atmospheric acidification. This study highlights the importance of preserving natural processes in mountain freshwater ecosystems.</p>

错误：搜索内容不能为空，请输入英文关键词
错误：关键词超出字数限制，请精简
高级检索

The return of natural fish communities in Bohemian Forest watercourses after acidification recovery

  • 期刊论文

  • 出版模式：

    开放获取

  • 发表日期：

    2026年3月30日

查看全文
  • Petr Blabolil,
  • Michal Tušer,
  • Milan Muška,
  • Vladislav Draštík,
  • Daniel Bartoň,
  • Jan Novotný,
  • Linda Seifert,
  • Rabea Klümpers,
  • Zbyněk Jančí,
  • Jan Mokrý,
  • Teresa Westermeier,
  • Stephan Paintner,
  • Jaroslav Vrba,
  • Tomáš Jůza

摘要

Following decades of atmospheric acidification, the Bohemian Forest watercourses are now witnessing a remarkable resurgence of natural fish communities. This study presents the most comprehensive ichthyological survey of the region to date, covering 168 watercourse sites across the Czech and Bavarian parts of the Bohemian Forest. Using standardized electrofishing methods, we assessed species composition, density, and the presence of young-of-the-year individuals in relation to environmental characteristics. Fish were detected at 165 sites, with brown trout (Salmo trutta) and bullhead (Cottus gobio) being the dominant species. The widespread occurrence of young-of-the-year individuals indicates successful natural reproduction. Multivariate analyses revealed that fish community structure was significantly influenced by altitude, watercourse morphology, and substrate composition. Species richness increased with watercourse size and habitat heterogeneity. Acidification-sensitive species were found even in high-altitude headwaters, suggesting substantial ecosystem recovery. The near absence of invasive species further supports the high ecological quality of these watercourses. The fish fauna of the Bohemian Forest nowadays reflects the natural recovery of aquatic ecosystems after decades of atmospheric acidification. This study highlights the importance of preserving natural processes in mountain freshwater ecosystems.