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首页> 外文期刊>Estuarine Coastal and Shelf Science >Small-scale effects of hydrodynamics on the structure of intertidal macroalgal communities: A novel approach
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Small-scale effects of hydrodynamics on the structure of intertidal macroalgal communities: A novel approach

机译：水动力对潮间带大型藻类群落结构的小规模影响：一种新方法

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摘要

Wave height was used as a proxy to assess the effect of hydrodynamics on the development and structure of intertidal North-East Atlantic rocky macroalgal communities (Brittany). The characterization of hydrodynamics at small-scale (about 10 m) was performed through wave height in situ monitoring using pressure sensors. Both the diversity and the cover of the macroalgal communities were sampled in parallel. Wave heights exhibit large variations with values ranging from ca. 5 cm to 1.60 m. We show that wave height directly controls the cover of macroalgal canopies (Pearson's r between -0.62 and -0.39). In all communities, most of the fucoid covers regressed with increasing wave height values. By contrast, positive correlations were found at low shore levels between wave heights and the cover of the kelp Laminaria digitata and also of several species of Rhodophyta. Redundancy analysis points out the significant effect of wave height on the inner variability of macroalgal communities, explaining up to 19% of their upright structure and more than 15% of the distribution of canopy-forming groups. In assemblages dominated by either Pelvetia canaliculata or Fucus serrates, a significant negative correlation was also evidenced with the index of community structure (Ics), which gives an appraisal of both the structure and the development of macroalgal communities. In conclusion, this study provides a novel experimental approach helping to quantify the effects of hydrodynamics on the structure of macroalgal communities using a small-scale in situ quantification of wave heights, revealing hydrodynamics as the main environmental driver of inner structural variations in seaweed assemblages.
机译：波高被用作评估水动力对潮间带东北大西洋岩石巨藻群落（布列塔尼）发育和结构的影响的代表。通过使用压力传感器的原位监测波高来进行小规模（约10 m）流体动力学的表征。同时对大型藻类群落的多样性和覆盖率进行了采样。波高表现出较大的变化，其值范围从大约1到2。 5厘米至1.60 m我们表明，波高直接控制了大型藻类冠层的覆盖（皮尔逊r在-0.62和-0.39之间）。在所有社区中，大多数岩藻土覆盖物都随着波高值的增加而退化。相比之下，在低海平面处，海浪Laminaria digitata和数种红藻类植物的波高与覆盖度之间存在正相关。冗余分析指出了波高对大型藻类群落内部变异的重大影响，可以解释其高达19％的直立结构和超过15％的冠层形成群分布。在以Pelvetia canaliculata或Fusus锯齿为主导的组合中，群落结构指数（Ics）也显示出显着的负相关性，从而对大型藻类群落的结构和发育进行了评估。总而言之，这项研究提供了一种新颖的实验方法，可通过对波浪高度进行小规模原位量化来量化流体力学对大型藻类群落结构的影响，揭示了流体动力学是海藻组合内部结构变化的主要环境驱动因素。

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  • 来源
    《Estuarine Coastal and Shelf Science》 |2019年第15期|106290.1-106290.10|共10页
  • 作者

    Burel Thomas; Schaal Gauthier; Grall Jacques; Le Duff Michel; Chapalain Georges; Schmitt Blondie; Gemin Maxence; Boucher Olivier; Gall Erwan Ar;

  • 作者单位

    UMR 6539 UBO CNRS IRD IFREMER, Lab Sci & Environm Marin, Rue Dumont dUrville, F-29280 Plouzane, Brittany, France;

    UMR 6539 UBO CNRS IRD IFREMER, Lab Sci & Environm Marin, Rue Dumont dUrville, F-29280 Plouzane, Brittany, France;

    Univ Bretagne Occidentale, Inst Univ Europeen Mer, Observ Domaine Cotier, UMS 3113, Rue Dumont dUrville, F-29280 Plouzane, Brittany, France;

    Univ Bretagne Occidentale, Inst Univ Europeen Mer, Observ Domaine Cotier, UMS 3113, Rue Dumont dUrville, F-29280 Plouzane, Brittany, France;

    Cerema, LGCE, 155 Rue Pierre Bouguer, F-29280 Plouzane, Brittany, France;

    UMR 6539 UBO CNRS IRD IFREMER, Lab Sci & Environm Marin, Rue Dumont dUrville, F-29280 Plouzane, Brittany, France;

    UMR 6539 UBO CNRS IRD IFREMER, Lab Sci & Environm Marin, Rue Dumont dUrville, F-29280 Plouzane, Brittany, France;

    Cerema, LGCE, 155 Rue Pierre Bouguer, F-29280 Plouzane, Brittany, France;

    UMR 6539 UBO CNRS IRD IFREMER, Lab Sci & Environm Marin, Rue Dumont dUrville, F-29280 Plouzane, Brittany, France;

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  • 正文语种 eng
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  • 关键词

    Macroalgal communities; Intertidal zone; Rocky shores; Wave heights; Hydrodynamics; Mini-diver; Brittany;

    机译：宏观节社区;跨境区;岩石海岸;波浪高;流体动力学;迷你潜水员;布列塔尼;

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