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Do Microscopic Organisms Feel Turbulent Flows?

机译:微观有机体会感到湍流吗?

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摘要

Microscopic organisms in aquatic environments are continuously exposed to a variety of physical and chemical conditions. Traditionally, it is accepted that due to their small size the physiology of microscopic organisms is not affected by the moving fluid at their scale. In this study, we demonstrate that the small-scale turbulence significantly modulates algal and bacterial nutrient uptake and growth in comparison to still-water control. The rate of energy dissipation emerges as a physically based scaling parameter integrating turbulence across a range of scales and microscopic organism responses at the cell level. Microbiological laboratory tests and bioassays do not consider fluid motion as an important variable in quantifying the physiological responses of microorganisms. A conceptual model of how to integrate the fluid motion in Monod-type kinetics is proposed. We anticipate our findings will encourage researchers to reconsider the laboratory protocols and modeling procedures in the analysis of microorganism physiological responses to changing physical and chemical environments by integrating the effect of turbulence.
机译:水生环境中的微观生物不断暴露于各种物理和化学条件下。传统上,人们公认的是,由于微生物的尺寸很小,因此不受其尺度上移动的流体的影响。在这项研究中,我们证明与静水控制相比,小规模湍流显着调节藻类和细菌养分的吸收和生长。能量耗散率以基于物理的缩放参数出现,该参数整合了一系列尺度上的湍流和细胞水平的微观生物响应。微生物实验室测试和生物测定并未将流体运动视为量化微生物生理反应的重要变量。提出了如何将流体运动整合到Monod型动力学中的概念模型。我们预期我们的发现将鼓励研究人员通过整合湍流的影响来重新考虑实验室协议和建模程序,以分析微生物对变化的物理和化学环境的生理反应。

著录项

  • 来源
    《Environmental Science & Technology》 |2009年第3期|764-768|共5页
  • 作者

    MIKI HONDZO; ALFRED WUEEST;

  • 作者单位

    St.Anthony Falls Laboratory, Department of Civil Engineering;

  • 收录信息 美国《科学引文索引》(SCI);美国《工程索引》(EI);美国《生物学医学文摘》(MEDLINE);美国《化学文摘》(CA);
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

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