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Island effect in the shell phenotypic plasticity of an intertidal gastropod
Zoology ( IF 1.6 ) Pub Date : 2020-08-01 , DOI: 10.1016/j.zool.2020.125802 J Vasconcelos 1 , R Sousa 2 , V M Tuset 3 , R Riera 4
Zoology ( IF 1.6 ) Pub Date : 2020-08-01 , DOI: 10.1016/j.zool.2020.125802 J Vasconcelos 1 , R Sousa 2 , V M Tuset 3 , R Riera 4
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The pattern of shell shape variation in populations of the top shell, Phorcus sauciatus from Madeira Island (NE Atlantic) was analysed as a function of substrate type and wave exposure, using geometric morphometrics. We hypothesized that P. sauciatus shows morphological variations to inhabit contrasting environments. Highly significant differences in shell shape were found depending on both substrate type and coastal exposure. The most marked differences were found between exposed and sheltered environments. Rounded shells in exposed environments may be explained by physiological reasons, since larger muscles are needed to ensure attachment to substrate in areas subject to harsh conditions. On the other side, conically-shaped shells may accommodate a larger body but with a smaller foot, an adaptation to sheltered environments. Slight shape variations were also observed among substrates, mostly in the degree of differentiation of some whorls. Differences could be related to a particular use of habitat and/or to the degree of exposure to water current. These results suggest that P. sauciatus is locally adapted to varying coastal hydrodynamics and may be considered as a good model in studies on adaptations of fauna to certain climate change effects.
中文翻译：
潮间带腹足动物壳表型可塑性中的岛效应
使用几何形态测量学分析了来自马德拉岛（大西洋东北部）的 Phorcus sauciatus 种群的壳形变化模式作为基质类型和波暴露的函数。我们假设 P. sauciatus 表现出形态变化以栖息在对比环境中。根据基材类型和沿海暴露情况，发现了壳形状的高度显着差异。在暴露环境和隐蔽环境之间发现了最显着的差异。暴露环境中的圆形外壳可以用生理原因来解释，因为需要更大的肌肉来确保在恶劣条件下的区域附着在基材上。另一方面，圆锥形的外壳可以容纳更大的身体但脚更小，以适应隐蔽的环境。在基质中也观察到轻微的形状变化，主要是一些螺纹的分化程度。差异可能与栖息地的特定用途和/或暴露于水流的程度有关。这些结果表明 P. sauciatus 在当地适应了不同的沿海水动力，并且可以被认为是研究动物群对某些气候变化影响的适应性的一个很好的模型。
更新日期：2020-08-01
中文翻译：
潮间带腹足动物壳表型可塑性中的岛效应
使用几何形态测量学分析了来自马德拉岛（大西洋东北部）的 Phorcus sauciatus 种群的壳形变化模式作为基质类型和波暴露的函数。我们假设 P. sauciatus 表现出形态变化以栖息在对比环境中。根据基材类型和沿海暴露情况，发现了壳形状的高度显着差异。在暴露环境和隐蔽环境之间发现了最显着的差异。暴露环境中的圆形外壳可以用生理原因来解释，因为需要更大的肌肉来确保在恶劣条件下的区域附着在基材上。另一方面，圆锥形的外壳可以容纳更大的身体但脚更小，以适应隐蔽的环境。在基质中也观察到轻微的形状变化，主要是一些螺纹的分化程度。差异可能与栖息地的特定用途和/或暴露于水流的程度有关。这些结果表明 P. sauciatus 在当地适应了不同的沿海水动力，并且可以被认为是研究动物群对某些气候变化影响的适应性的一个很好的模型。
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