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Effect of flooding on fish assemblages in small streams in South Korea

机译：洪水对韩国小溪鱼群的影响

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摘要

The impact of Typhoon-Rusa-generated flood on fish assemblages was investigated in small streams in the northeastern part of South Korea. As a result of high precipitation (870 mm day−1) during the typhoon, stream morphology and substrate composition changed. Stream depth and width decreased and slightly enlarged, respectively. Substantial amounts of mud and silt flowed into the streams and modified substrate composition to a simple state. Although the total number of individual fish significantly decreased after the flood, the dominant species remained the same relative to before the typhoon, and their relative abundance subsequently increased. However, the rank order of fish assemblages before and after the flood changed. Three years after the flood, fish assemblage recovered, but the number of individuals per site was still lower than prior to the flood. Flooding affects fish assemblages both directly and indirectly. Indirect impacts, such as habitat alteration, more critically affected the change in local fish assemblage and delayed recovery time. Nonetheless, fish assemblages persisted at sites where floods occurred.
机译：在韩国东北部的小溪中，研究了台风-鲁萨河洪水对鱼类种群的影响。由于台风期间的高降水量（870 mm day-1 ），河流形态和基质组成发生了变化。流的深度和宽度分别减小和略微增大。大量的泥浆和淤泥流入料流，并使改性的底物组成变为简单状态。尽管洪水后个别鱼类的总数显着减少，但优势物种相对于台风之前保持不变，并且其相对丰度随后增加。但是，洪水前后鱼群的等级顺序发生了变化。洪水三年后，鱼群恢复了，但每个地点的个体数量仍低于洪水之前。洪水直接或间接地影响鱼群。栖息地的改变等间接影响对当地鱼群的变化和恢复时间的延迟影响更大。尽管如此，在洪水泛滥的地方鱼群仍然存在。

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  • 来源
    《Limnology》 |2011年第2期|p.197-203|共7页
  • 作者

    Ju-Duk Yoon; Min-Ho Jang; Gea-Jae Joo;

  • 作者单位

    Department of Biological Sciences, Pusan National University, Busan, 609-735, South Korea;

    Department of Biology Education, Kongju National University, Gongju, 314-701, South Korea;

    Department of Biological Sciences, Pusan National University, Busan, 609-735, South Korea;

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  • 正文语种 eng
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  • 关键词

    Flood; Fish assemblage; Small stream; Substrate composition; Recovery;

    机译：洪水;鱼群;小溪流;底物成分;恢复;

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