Does "form follow function" in the rotiferan genus Keratella?
Does "form follow function" in the rotiferan genus Keratella?
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DOI：
10.1007/s10750-023-05192-9
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发表时间：
2023-04-28
期刊：
影响因子：
2.6
通讯作者：
Wallace，Robert L.
中科院分区：
文献类型：
--
作者：
Kusztyb，Samara;Januszkiewicz，Warren;Wallace，Robert L.
大多数种类的角藻都有圆顶状的背片，由多面体单元（小平面）组成的网络，由轻微凸起的脊状突起所界定。刻面的排列定义了一个物种的刻面模式（FP），产生的结构类似于一个测地线圆顶。研究人员已经根据它们的FP将物种分类，但尚未进行分析。此外，虽然一个强大的洛里卡已被建议，以保护Keratella从掠夺性攻击或其他行动造成钝力创伤（BFT），我们知道很少的是如何发生的。因此，在我们的研究中，我们测试了两个假设。(1)支持根据其FP将Keratellaspecies分类为独特的分组。(2)FP提供对物理应力的抵抗力。为了验证这一假设，我们使用了结构分析软件SkyCiv©。我们的研究结果表明支持四个FP类别。此外，SkyCiv分析提供了初步的“概念验证”，即Keratella FP具有功能意义：即，在我们的模型中增加或减少面元之后，预测的结构可靠性发生变化。我们认为，FP是适应性保护Keratella从骨折的洛里卡，可能会导致BFT发生在捕食性攻击桡足类或而捕获的水蚤鳃室内。
Most species ofKeratellapossess dome-shaped, dorsal plates comprising a network of polyhedral units (facets), delineated by slightly raised ridges. The arrangement of facets define a species’ facet pattern (FP), with the resulting structure resembling a geodesic dome. Researchers have sorted species into categories based on their FPs, but those have not been analyzed. Additionally, while a strong lorica has been suggested to protectKeratellafrom predatory attack or other actions causing blunt force trauma (BFT), we know little of how that occurs. Thus, in our study we tested two hypotheses. (1) There is support for categorizingKeratellaspecies into unique groupings based on their FPs. (2) FPs provide resistance to physical stresses. To test that hypothesis we used the structural analysis software SkyCiv©. Our results indicate support for four FP categories. Additionally, the SkyCiv analysis provided preliminary ‘proof-of-concept’ thatKeratellaFPs have a functional significance: i.e., adding or subtracting facets in our model was followed by a change in predicted structural reliability. We posit that FPs are adaptations protectingKeratellafrom fractures to the lorica that may result from BFT incurred during predatory attack by copepods or while caught within the branchial chambers of daphnids.