Assessing the Morphological Impacts of Ammonoid Shell Shape through Systematic Shape Variation
Assessing the Morphological Impacts of Ammonoid Shell Shape through Systematic Shape Variation
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DOI：
10.1093/icb/icaa067
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发表时间：
2020-11-01
影响因子：
2.6
通讯作者：
Choi, YunJi
中科院分区：
文献类型：
--
作者：
Hebdon, Nicholas;Ritterbush, Kathleen;Choi, YunJi
几十年来，围绕菊石已经积累了大量的研究。这项研究的一个核心方面是试图通过分析它们的外壳的形态和外壳在水中被推动时所产生的阻力来推断它们的生活模式。工具，如韦斯特曼Morphospace已经开发出调查和支架的假设，这些调查的结果。我们使用计算流体动力学模拟流体流动的一套24理论菊石形态询问系统的变化在这个空间。我们的研究结果支持了一些长期存在的预期阻力行为;海螺通货膨胀有最大的影响，菊石阻力。然而，我们也发现，其他长期存在的假设，如氧锥状菊石是最好的游泳者，是受到实质性的变化和细微差别，导致他们的形态，这是不占通过简单的阻力评估。
A substantial body of research has been accumulated around ammonoids over several decades. A core aspect of this research has been attempting to infer their life mode from analysis of the morphology of their shells and the drag they incur as that shell is pushed through the water. Tools such as Westermann Morphospace have been developed to investigate and scaffold hypotheses about the results of these investigations. We use computational fluid dynamics to simulate fluid flow around a suite of 24 theoretical ammonoid morphologies to interrogate systematic variations within this space. Our findings uphold some of the long-standing expectations of drag behavior; conch inflation has the greatest influence over ammonoid drag. However, we also find that other long-standing assumptions, such as oxyconic ammonoids being the best swimmers, are subject to substantial variation and nuance resulting from their morphology that is not accounted for through simple drag assessment.