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首页> 外文期刊>Aquatic Sciences >The role of the hyporheic zone for a benthic fish in an intermittent river: a refuge, not a graveyard
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The role of the hyporheic zone for a benthic fish in an intermittent river: a refuge, not a graveyard

机译：间歇河中底栖鱼类的排泄区的作用：避难所，而不是墓地

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摘要

In lotic systems, the hyporheic zone has been suggested as a potential refuge for aquatic organisms during disturbances (hyporheic refuge hypothesis). However, the supporting evidence is unclear, especially regarding the survival of hyporheic refugees and their contribution to the recovery of post-disturbance populations. Moreover, few studies have focused on the importance of the hyporheic refuge for aquatic vertebrates such as fish. In this study, we present evidence that the hyporheic zone acts as a refuge for a small benthic fish (Cobitis shikokuensis) following surface drying in an intermittent river. We examined its survival during and recolonization after dry periods by direct hyporheic sampling and mark-and-recapture surveys. When the streambed dried, hyporheic sampling was conducted 58 times across 33 locations in the intermittent reach and 31 individuals of C. shikokuensis were captured from extracted hyporheic water. Mark-and-recapture surveys revealed that recolonizers after re-wetting included C. shikokuensis individuals that had survived dry periods in the hyporheic refuge. The condition factor of C. shikokuensis significantly declined after dry periods, suggesting that most recolonizers suffered from physiological stress, probably within the hyporheic refuge. These results clearly support the long-debated, hyporheic refuge hypothesis, and provide a striking example of the critical role of the hyporheic zone in population maintenance of lotic organisms.
机译：在抽水系统中，人们建议将低变带作为干扰期间水生生物的潜在避难所（低渗避难所假设）。但是，支持性证据尚不清楚，尤其是在流产性难民的生存及其对灾后人口恢复中的贡献方面。此外，很少有研究集中于对鱼类等水生脊椎动物进行防泄避的重要性。在这项研究中，我们提供的证据表明，在断断续续的河流中进行表面干燥后，低变流带可作为小型底栖鱼类（Cobitis shikokuensis）的避难所。我们通过直接的流血采样和标记和回收调查来检查其在干燥时期的生存以及在干燥时期的重新定殖。当流化床干燥后，在断续河段的33个位置进行了58次流水采样，并从提取的流水中捕获了31株四角C。标记和夺回调查显示，重新润湿后的定殖剂包括在排泄液避难所中幸存了干旱时期的C. shikokuensis个体。干燥后，shikokuensis的条件因子显着下降，这表明大多数定居者遭受了生理压力，可能是在流泻性避难所内。这些结果清楚地支持了长期争论的，防流产避难所假说，并提供了一个突出的例子，说明了防流失区在维护有机体种群中的关键作用。

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  • 来源
    《Aquatic Sciences》 |2013年第3期|425-431|共7页
  • 作者

    R. Kawanishi; M. Inoue; R. Dohi; A. Fujii; Y. Miyake;

  • 作者单位

    Graduate School of Science and Engineering, Ehime University, 2-5 Bunkyo-cho, Matsuyama, Ehime 790-8577, Japan;

    Graduate School of Science and Engineering, Ehime University, 2-5 Bunkyo-cho, Matsuyama, Ehime 790-8577, Japan;

    Graduate School of Science and Engineering, Ehime University, 2-5 Bunkyo-cho, Matsuyama, Ehime 790-8577, Japan;

    Graduate School of Science and Engineering, Ehime University, 2-5 Bunkyo-cho, Matsuyama, Ehime 790-8577, Japan;

    Graduate School of Science and Engineering, Ehime University, 2-5 Bunkyo-cho, Matsuyama, Ehime 790-8577, Japan;

  • 收录信息 美国《科学引文索引》(SCI);
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

    Hyporheic refuge hypothesis; Drought; Temporary river; Habitat connectivity; Disturbance;

    机译：疏水避难所假说;干旱;临时河人居连接;骚乱;

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