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Ocean acidification impacts growth and shell mineralization in juvenile abalone (Haliotis tuberculata)

机译：海洋酸化影响少年鲍鱼（Haliotis tuberculata）的生长和壳矿化

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Ocean acidification (OA) is a major global driver that leads to substantial changes in seawater carbonate chemistry, with potentially serious consequences for calcifying organisms. Marine shelled molluscs are ecologically and economically important species, providing essential ecosystem services and food sources for other species. Due to their physiological characteristics and their use of calcium carbonate (CaCO3) to build their shells, molluscs are among the most vulnerable invertebrates with regard to OA, with early developmental stages being particularly sensitive to pH changes. This study investigated the effects of CO2-induced OA on juveniles of the European abalone Haliotis tuberculata, a commercially important gastropod species. Six-month-old juvenile abalones were cultured for 3 months at four pH levels (8.1, 7.8, 7.7, 7.6) representing current and predicted near-future conditions. Survival, growth, shell microstructure, thickness, and strength were compared across the four pH treatments. After 3 months of exposure, significant reductions in juvenile shell length, weight, and strength were revealed in the pH 7.6 treatment. Scanning electron microscopy observations also revealed modified texture and porosity of the shell mineral layers as well as alterations of the periostracum at pH 7.6 which was the only treatment with an aragonite saturation state below 1. It is concluded that low pH induces both general effects on growth mechanisms and corrosion of deposited shell in H. tuberculata. This will impact both the ecological role of this species and the costs of its aquaculture.
机译：海洋酸化（OA）是全球主要驱动力，导致海水碳酸盐化学性质发生重大变化，对钙化生物可能产生严重后果。海洋带壳软体动物是具有重要生态和经济意义的物种，为其他物种提供了必不可少的生态系统服务和食物来源。由于它们的生理特性和使用碳酸钙（CaCO3）形成壳的原因，软体动物相对于OA而言是最脆弱的无脊椎动物之一，并且早期发育阶段对pH变化特别敏感。这项研究调查了CO2诱导的OA对欧洲鲍鱼Haliotis tuberculata（一种重要的腹足动物）的幼鱼的影响。将六个月大的鲍鱼在四个pH值（8.1、7.8、7.7、7.6）下培养3个月，这四个pH值分别代表当前和未来的预测条件。比较了四种pH处理的存活率，生长，壳微结构，厚度和强度。暴露3个月后，pH 7.6处理显着降低了幼鱼壳的长度，重量和强度。扫描电子显微镜观察还发现，壳矿物质层的质地和孔隙率发生了变化，pH 7.6时骨钙石的改变，这是唯一的文石饱和状态低于1的处理方法。结论是低pH值对生长均具有诱导作用。结核菌的壳沉积机理和腐蚀。这将影响该物种的生态作用及其水产养殖的成本。

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  • 来源
    《Marine biology》 |2020年第1期|11.1-11.14|共14页
  • 作者

    Auzoux-Bordenave Stephanie; Wessel Nathalie; Badou Aicha; Martin Sophie; MZoudi Saloua; Avignon Solene; Roussel Sabine; Huchette Sylvain; Dubois Philippe;

  • 作者单位

    SU CNRS MNHN IRD UMR Biol Organismes & Ecosyst Aquat BOREA Stn F-29900 Concarneau France|SU 4 Pl Jussieu F-75005 Paris France;

    IFREMER Dept Oceanog & Dynam Ecosyst ODE BP 21105 Rue Ile Yeu F-44311 Nantes 3 France;

    Museum Natl Hist Nat Stn Marine Concarneau F-29900 Concarneau France;

    SU CNRS UMR 7144 Adaptat & Div Milieu Marin AD2M Stn Biol Roscoff F-29680 Roscoff France|SU 4 Pl Jussieu F-75005 Paris France;

    Univ Libre Bruxelles Lab Biol Marine CP 160-15 B-1050 Brussels Belgium;

    SU CNRS MNHN IRD UMR Biol Organismes & Ecosyst Aquat BOREA Stn F-29900 Concarneau France;

    Univ Brest CNRS IFREMER IRD LEMAR F-29280 Plouzane France;

    Ecloserie France Haliotis F-29880 Plouguerneau France;

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