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Drift patterns of particulate matter and organisms during artificial high flows in a large experimental channel

机译：大型实验通道中人工高流量期间颗粒物和生物的漂移模式

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摘要

Using a large experimental channel, five artificial high flows with different flow regimes were launched to reveal the precise temporal sequences of drifting particulate matter and organisms during the high flows. Drifting fine particulate matter and organisms were collected by sampling bottles and a water pump, respectively. The peaks of drift abundance occurred before the peak discharges, and the abundance declined quickly within several minutes during the rising phase of high flows. The major determinant of drift abundance of particulate matter and organisms was periods of stable conditions before each high flow (tested by determination coefficients in a correlation analysis). The drift of macroscopic plant material also accelerated the drifts of epiphytic fauna and infauna, which drifted with plants and bed sediments. The magnitude (discharge and duration of peak flows) of high flows only slightly affected drift abundance. The fauna more resistant to high flows were invertebrates that fasten their cases or retreats by silk threads on the substrata. Invertebrate taxa having sucking apparatus or high swimming activity were also resistant to high flows.
机译：使用大型实验通道，启动了五种具有不同流动方式的人工高流量，以揭示高流量期间颗粒物和生物体漂移的精确时间顺序。通过采样瓶和水泵分别收集细小颗粒物和生物。漂移丰度的峰值出现在峰值放电之前，并且在高流量上升阶段的几分钟内丰度迅速下降。颗粒物和生物体漂移丰度的主要决定因素是每次高流量之前稳定状态的时期（通过相关分析中的确定系数进行测试）。宏观植物材料的漂移也加速了附生动物群和动物的漂移，它们随植物和床底沉积物一起漂移。高流量的大小（流量和峰值流量的持续时间）仅对漂移量有轻微影响。抵抗高流量的动物是无脊椎动物，它们通过基底上的丝线固定它们的外壳或后退。具有吸吮设备或具有高游泳活动性的无脊椎动物类群也能抵抗高流量。

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  • 来源
    《Limnology》 |2006年第2期|93-102|共10页
  • 作者

    Shoko Mochizuki; Yuichi Kayaba; Kazumi Tanida;

  • 作者单位

    Laboratory of Ecology and Systematics Graduate School of Science Osaka Prefecture University 1-1 Gakuen-cho Naka-ku Sakai Osaka 599-8531 Japan;

    Aqua Restoration Research Center Kawashima-Kasada Gifu Japan;

    Laboratory of Ecology and Systematics Graduate School of Science Osaka Prefecture University 1-1 Gakuen-cho Naka-ku Sakai Osaka 599-8531 Japan;

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  • 正文语种 eng
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  • 关键词

    Benthic invertebrates; Initial drift; Stream drift; Temporal sequence;

    机译：底栖无脊椎动物;初始漂移;溪流漂移;时间序列;

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