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首页> 美国卫生研究院文献>Environmental Engineering Science >Model Simulation of Diurnal Vertical Migration Patterns of Different-Sized Colonies of Microcystis Employing a Particle Trajectory Approach
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Model Simulation of Diurnal Vertical Migration Patterns of Different-Sized Colonies of Microcystis Employing a Particle Trajectory Approach

机译：微囊藻不同大小菌落日垂直垂直迁移模式的粒子轨迹模拟

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Microcystis, a genus of potentially harmful cyanobacteria, is known to proliferate in stratified freshwaters due to its capability to change cell density and regulate buoyancy. In this study, a trajectory model was developed to simulate the cell density change and spatial distribution of Microcystis cells with nonuniform colony sizes. Simulations showed that larger colonies migrate to the near-surface water layer during the night to effectively capture irradiation and become heavy enough to sink during daytime. Smaller-sized colonies instead took a longer time to get to the surface. Simulation of the diurnally varying Microcystis population profile matched the observed pattern in the field when the radii of the multisized colonies were in a beta distribution. This modeling approach is able to take into account the history of cells by keeping track of their positions and properties, such as cell density and the sizes of colonies. It also serves as the basis for further developmental modeling of phytoplanktons that are forming colonies and changing buoyancy.
机译：微囊藻是潜在有害的蓝细菌的一种，由于其改变细胞密度和调节浮力的能力，它在分层淡水中繁殖。在这项研究中，建立了一个轨迹模型来模拟菌落尺寸不均匀的微囊藻细胞的细胞密度变化和空间分布。模拟表明，较大的菌落在夜间迁移到近地表水层，以有效捕获辐射，并变得足够沉重，在白天沉没。相反，较小的殖民地需要更长的时间才能浮出水面。当多尺寸菌落的半径呈β分布时，日变化的微囊藻种群分布的模拟与田间观察到的模式相匹配。这种建模方法能够通过跟踪细胞的位置和特性（例如细胞密度和菌落大小）来考虑细胞的历史。它也为形成集落和改变浮力的浮游植物的进一步开发建模提供了基础。

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