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首页> 外文期刊>Marine ecology >Shell-shape and morphometric variability in Mytilus galloprovincialis from micro-tidal environments: responses to different hydrodynamic drivers
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Shell-shape and morphometric variability in Mytilus galloprovincialis from micro-tidal environments: responses to different hydrodynamic drivers

机译：潮汐微潮环境中的Mytilus galloprovincialis的壳形和形态计量变异：对不同流体动力驱动器的响应

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摘要

Tidal conditions differently influence inter-tidal organisms in terms of general physiological and metabolic responses. In this study we investigated the morphological response in shells of Mytilus galloprovincialis native to different micro-tidal coastal environments in the Northern Adriatic Sea. Our purpose was to highlight the ecophenotypic variability across tidal levels and to elucidate how tidal currents and waves produced by anthropogenic activities may play a part in modulating shell morphology. Three sampling sites were selected: an open-sea area 15 km off-shore and two sites within the lagoon of Venice, the first near one of its three inlets, and the other one in the proximity of Venice city centre. At each sampling site, organisms were seasonally collected at different depths within their vertical zonation, either in the inter-tidal zone i.e. at both the highest and lowest tide zonation limits, and subtidally. The mussel shells were analysed by investigation of their morphometric relationships (height/length and width/length ratios) and by elliptic Fourier analysis of the shell contours. Shell thickness and condition index were also evaluated for a better comprehension of energy allocation/partitioning. Estimates based on long-term measurements, visual observation, wind statistics and wave growth laws allowed an evaluation of the forces acting on shells. At the open-sea site, the observed phenotypic variability of both shell shape and thickness was clearly related to the tidal vertical zonation. At the two lagoon sites, the currents generated by tidal flow through the inlet and the waves caused by the frequent passage of boats influenced both shell shape and thickness. A trade-off between protection and growth was apparent along the tide gradient, as emphasized by the differences in the partitioning and allocation of energy between shell and flesh production.
机译：在一般的生理和代谢反应方面，潮汐条件对潮间带生物的影响不同。在这项研究中，我们调查了北亚得里亚海不同潮汐沿海环境中原生的Mytilus galloprovincialis贝壳的形态响应。我们的目的是强调潮汐水平上的生态表型变异性，并阐明人为活动产生的潮流和波浪如何在调节壳的形态中发挥作用。选择了三个采样点：离岸15公里的海域和威尼斯泻湖内的两个采样点，第一个采样点靠近三个进水口之一，另一个采样点位于威尼斯市中心附近。在每个采样点，在潮间带（即最高和最低潮汐区带界限）以及在微妙的地方，在垂直区域内不同深度处季节性采集生物。通过研究贻贝壳的形态关系（高度/长度和宽度/长度比）并通过对壳轮廓进行椭圆傅里叶分析来分析贻贝的壳。还评估了壳的厚度和状态指数，以更好地理解能量分配/分配。根据长期测量，目测，风统计和波浪增长定律进行的估算可以评估作用在壳体上的力。在公海站点，所观察到的贝壳形状和厚度的表型变异性与潮汐垂直带明显相关。在两个泻湖处，潮汐流通过进口而产生的水流以及船频繁通过而引起的波浪影响着船壳的形状和厚度。沿着潮汐梯度，保护与增长之间的权衡是显而易见的，壳和果肉生产之间能量分配和分配的差异突出了这一点。

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