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首页> 外文期刊>Journal of Experimental Marine Biology and Ecology >Plasticity in the purple sea urchin (Strongylocentrotus purpwatus): Tube feet regeneration and adhesive performance
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Plasticity in the purple sea urchin (Strongylocentrotus purpwatus): Tube feet regeneration and adhesive performance

机译：紫海胆中的可塑性（strongylocentrootus purpwatus）：管脚再生和粘合性能

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摘要

Sea urchins are key members of hydrodynamically intense habitats, such as open coast intertidal and shallow reefs. Secure attachment to the substrata, by means of tube feet and spines, is essential for survival. Previous studies suggest that environmental variables (i.e. hydrodynamics, substrate) can influence the morphology and adhesive performance of tube feet. Catastrophic failure of tube feet occurs often due to strong hydrodynamic forces. The time and ability of amputated tube feet to return to pre-amputation adhesive performance, and the interaction with environmental factors are unknown. To assess the dynamics of adhesive performance and regeneration of tube feet, we 1) evaluated phenotypic plasticity of disc surface area of two urchin populations inhabiting sites with different lithologies (field - in-situ conditions) and, 2) assessed regeneration of their functionality (tube foot length, time of disc first appearance, disc surface area, and tenacity) after amputation (laboratory - ex-situ conditions). Results showed that in the field, tube feet are plastic in their phenotype: sea urchins from the two sites differed in their disc surface area. Plasticity was also observed in the laboratory, where urchins regenerate tube feet that are shorter in length and have smaller discs compared to pre-amputation measurements. Thus, sea urchin tube feet recovering from amputation events in the intertidal may differ in their initial morphology and in the recovery period after amputation. Moreover, tube feet that were never amputated also decreased their disc area, suggesting that plasticity occurs on tube feet of urchins maintained in laboratory conditions. In shallow temperate reef systems, urchins are ecosystem engineers that affect the abundance and distribution of many other organisms. The plastic nature of morphological and adhesive abilities of sea urchin tube feet influences their ability to survive and dominate wave-battered habitats.
机译：海胆是流体动力学栖息地的关键成员，如开阔的海岸跨境和浅礁。通过管脚和刺固定到Substra数据的附着，对生存至关重要。以前的研究表明，环境变量（即流体动力学，衬底）可以影响管脚的形态和粘合性能。由于强烈的流体动力力，管脚的灾难性失败通常是由于强的流体动力力。截肢管脚返回到截肢粘合性能的时间和能力，以及与环境因素的相互作用是未知的。为了评估管脚的粘合性能和再生的动力学，我们1）评估了具有不同岩性（原位状况）的两个核素群体居住位点的盘表面积的表型可塑性（现场状况），2）评估其功能的再生（截肢后的管脚长度，圆盘的第一外观，盘表面积和韧度）（实验室 - 前原位条件）。结果表明，在该领域，管脚在其表型中是塑料：来自两个站点的海胆不同，在其盘表面积不同。在实验室中也观察到可塑性，其中核心再生管脚长度短，并且与截肢测量相比具有较小的盘。因此，从透析中截止化事件中恢复的海胆管脚可能在初始形态和截肢后的恢复期间可能不同。此外，从未截污的管脚也降低了它们的光盘区域，表明在实验室条件中保持的核心管脚上发生可塑性。在浅水温带礁石系统中，乌尔辛是影响许多其他生物的丰富和分布的生态系统工程师。海胆管脚形态学和粘性能力的塑性性质影响了它们的生存和主导波动栖息地的能力。

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