Adaptation-induced collective dynamics of a single-cell protozoan
Adaptation-induced collective dynamics of a single-cell protozoan
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DOI：
10.1103/physreve.77.011917
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发表时间：
2008-01-01
影响因子：
2.4
通讯作者：
Sugawara, Ken
中科院分区：
文献类型：
--
作者：
Ogata, Maiko;Hondou, Tsuyoshi;Sugawara, Ken
我们研究了单细胞原生动物在狭窄管状环中的行为。这种环境迫使它们在一维周期边界条件下游动。超过临界密度，单细胞原生动物在没有外界刺激的情况下自发聚集。游动细胞高密度区表现出特有的集体动力学，包括平移和边界波动。通过对游动细胞的速度分布和转动速率的分析，发现调节游动细胞的转动速率会导致细胞的稳定聚集，而速度的加速则会导致细胞的不稳定聚集。这两种相反的效应可能有助于解释集体行为的自发动力。我们还提出了一个随机模型的机制，潜在的集体行为的游泳细胞。
We investigate the behavior of a single-cell protozoan in a narrow tubular ring. This environment forces them to swim under a one-dimensional periodic boundary condition. Above a critical density, single-cell protozoa aggregate spontaneously without external stimulation. The high-density zone of swimming cells exhibits a characteristic collective dynamics including translation and boundary fluctuation. We analyzed the velocity distribution and turn rate of swimming cells and found that the regulation of the turing rate leads to a stable aggregation and that acceleration of velocity triggers instability of aggregation. These two opposing effects may help to explain the spontaneous dynamics of collective behavior. We also propose a stochastic model for the mechanism underlying the collective behavior of swimming cells.