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<p><i>Daphnia magna</i> Straus, 1820, a Holarctic water flea and a well-known model organism, has been detected for the first time in Lake Titicaca. Genetic analyses revealed that the Lake Titicaca population is closely related to European strains, differing significantly from natural populations in North America. The findings suggest a likely human-mediated introduction, potentially through scientific and educational activities, tourism, or aquaculture. This raise concerns about further spread in South America due to the widespread use of <i>D. magna</i> in ecotoxicological research. Its establishment in Lake Titicaca may lead to ecological impacts, particularly through interactions with native species such as <i>Daphnia</i> cf. <i>pulex</i>. Continued monitoring is necessary to understand the ecological consequences of this introduction in high-altitude Andean lakes.</p>

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Unexpected arrival of Daphnia magna Straus, 1820 (Crustacea: Cladocera) in high mountain Lake Titicaca

  • 期刊论文

  • 发表日期：

    2025年7月30日

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  • Dmitry D. Pereboev,
  • Maciej Karpowicz,
  • Alexey A. Kotov

摘要

Daphnia magna Straus, 1820, a Holarctic water flea and a well-known model organism, has been detected for the first time in Lake Titicaca. Genetic analyses revealed that the Lake Titicaca population is closely related to European strains, differing significantly from natural populations in North America. The findings suggest a likely human-mediated introduction, potentially through scientific and educational activities, tourism, or aquaculture. This raise concerns about further spread in South America due to the widespread use of D. magna in ecotoxicological research. Its establishment in Lake Titicaca may lead to ecological impacts, particularly through interactions with native species such as Daphnia cf. pulex. Continued monitoring is necessary to understand the ecological consequences of this introduction in high-altitude Andean lakes.