Spatiotemporal Dynamics of Coral Polyps on a Fluidic Platform
Spatiotemporal Dynamics of Coral Polyps on a Fluidic Platform
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DOI：
10.1103/physrevapplied.18.024078
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发表时间：
2022-08-30
影响因子：
4.6
通讯作者：
Yang, Jinkyu
中科院分区：
文献类型：
--
作者：
Li, Shuaifeng;Roger, Liza M.;Yang, Jinkyu
造礁珊瑚本来就是固着生物。然而，运动是珊瑚虫的一个重要行为特征，它在摄食、竞争、防御、繁殖以及生存和适应中起着至关重要的作用。尽管珊瑚虫固有的时间和空间多尺度特征的重要性，其定量特性和建模仍然具有挑战性和未开发的。在这里，我们使用流体平台在不同的光照和温度条件下观察了体内的尖孔珊瑚，该平台允许对小的活珊瑚碎片进行直接显微镜研究，其中揭示了息肉平面内波动运动的随机动力学。通过运动相关分析描述了结节上息肉之间的关系。此外，通过功率谱分析，利用Hurst指数揭示了珊瑚虫在一定光照条件和温度下的分数布朗运动。最后，珊瑚虫的运动由Langevin动力学建模，通过数据驱动的参数化得到数值。这种实验观察，数值分析和理论建模的结合为我们了解珊瑚在不断变化的环境条件下的生物和物理行为开辟了一条途径。
Reef-building corals are inherently sessile organisms. However, motion is an important behavioral trait of coral polyps, which plays an essential role in feeding, competition, defense, reproduction, and thus, survival and fitness. Notwithstanding the importance of inherent temporal and spatial multiscale features of polyps, their quantitative properties and modeling still remain challenging and unexplored. Here, we observe Pocillopora acuta in vivo under different light and temperature conditions using a fluidic platform that allows the direct microscopic study of small live coral fragments, where the stochastic dynamics of the in-plane waving motion of polyps is uncovered. The relationship between polyps on nubbins is described by motion-correlation analysis. Additionally, the fractional Brownian motions of polyps under certain light conditions and temperatures are revealed by the Hurst index via power spectral analysis. Finally, the motion of polyps is modeled by Langevin dynamics, numerically obtained by data-driven parameteriza-tion. This combination of experimental observations, numerical analysis, and theoretical modeling opens an avenue to boost our understanding of the biological and physical behaviors of corals in relation to changing environmental conditions.