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首页> 外文期刊>Marine ecology >Structural integrity of Ellisolandia elongata reefs: A mechanical approach to compare tensile strengths in natural and controlled environments
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Structural integrity of Ellisolandia elongata reefs: A mechanical approach to compare tensile strengths in natural and controlled environments

机译：Ellisolandia elongata礁的结构完整性：比较自然和受控环境下抗张强度的机械方法

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摘要

Geniculate coralline algae are oases of biodiversity, providing nursery areas and shelter for the species that live amongst their fronds. The key to their success in the inter-tidal is the ability to withstand hydrodynamic forces. Under culturing conditions most of the physical and ecological stressors such as intense hydrodynamic forces and grazing are extremely reduced, thus affecting species mechanical properties and their response to external threats. The aim of the present study was to investigate tensile mechanical properties of clusters of fronds of Ellisolandia elongata from natural (sheltered and exposed reef) and culturing conditions (after 1month of culturing). The tensile test showed that the first failure stress (sigma(I)) was not significantly different between the natural and culturing conditions, indicating that the two reefs (sheltered and exposed) were characterized by the same distribution of pre-existing, inherent structural flaws. Interestingly, the sigma(max) (maximum stress before rupture) was significantly different between the two conditions, with the culturing condition being more resistant to average load compared to the natural conditions. The maximum stress before rupture (sigma(max)) showed the influence of the environment in reducing the strength and elasticity of the fronds.
机译：细小的珊瑚藻是生物多样性的绿洲，为生活在其叶间的物种提供了育苗区和庇护所。它们在潮间带成功的关键是承受流体动力的能力。在培养条件下，大多数物理和生态压力源（例如强烈的水动力和放牧）都大大降低，从而影响物种的机械性能及其对外部威胁的响应。本研究的目的是研究来自自然（庇护和裸露的礁石）和培养条件（培养1个月后）的Ellisolandia elongata叶簇的拉伸机械性能。拉伸试验表明，在自然条件和培养条件下，第一破坏应力（sigma（I））均无显着差异，表明两个珊瑚礁（避难所和裸露地）的特征是预先存在的固有结构缺陷的分布相同。有趣的是，两种条件之间的sigma（max）（断裂前的最大应力）显着不同，与自然条件相比，培养条件对平均负载的抵抗力更大。断裂前的最大应力（sigma（max））显示了环境在降低叶状体的强度和弹性方面的影响。

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  • 来源
    《Marine ecology》 |2017年第5期|e12455.1-e12455.10|共10页
  • 作者

    Ragazzola Federica; Raiteri Giancarlo; Fabbri Paride; Scafe Matteo; Florio Maurizio; Nannini Matteo; Lombardi Chiara;

  • 作者单位

    Univ Portsmouth, Inst Marine Sci, Portsmouth, Hants, England;

    ENEA Res Ctr S Teresa, Lab Biodivers & Ecosyst Serv SSPT PROTER BES, Pozzuolo Di Lerici, La Spezia, Italy;

    ENEA Faenza Res Labs, Faenza Lab Mat Technol SSPT PROMAS TEMAF, Faenza, Italy;

    ENEA Faenza Res Labs, Faenza Lab Mat Technol SSPT PROMAS TEMAF, Faenza, Italy;

    ENEA Res Ctr S Teresa, Lab Biodivers & Ecosyst Serv SSPT PROTER BES, Pozzuolo Di Lerici, La Spezia, Italy|Univ Pavia, Dept Earth & Environm Sci, Pavia, Italy;

    ENEA Res Ctr S Teresa, Lab Biodivers & Ecosyst Serv SSPT PROTER BES, Pozzuolo Di Lerici, La Spezia, Italy|Univ Pisa, Dept Biol, Pisa, Italy;

    ENEA Res Ctr S Teresa, Lab Biodivers & Ecosyst Serv SSPT PROTER BES, Pozzuolo Di Lerici, La Spezia, Italy;

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  • 正文语种 eng
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  • 关键词

    controlled conditions; natural conditions; structural integrity; temperate reef;

    机译：受控条件;自然条件;结构完整性;温带珊瑚礁;

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