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首页> 外文期刊>Journal of Experimental Marine Biology and Ecology >Seawater acidification by CO_2 in a coastal lagoon environment: Effects on life history traits of juvenile mussels Mytilus galloprovincialis
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Seawater acidification by CO_2 in a coastal lagoon environment: Effects on life history traits of juvenile mussels Mytilus galloprovincialis

机译：沿海泻湖环境中CO_2对海水的酸化：对贻贝幼体生活史特征的影响

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摘要

The carbonate chemistry of seawater from the Ria Formosa lagoon was experimentally manipulated, by diffusing pure CO_2, to attain two reduced Ph levels, by - 0.3 and - 0.6 Ph units, relative to unmanipulated seawater. After 84 days of exposure, no differences were detected in terms of growth (somatic or shell) or mortality of juvenile mussels Mytilus galloprovincialis. The naturally elevated total alkalinity of the seawater (≈3550μmol kg~(-1)) prevented under-saturation of CaCO_3, even under Pco_2 values exceeding 4000 μatm, attenuating the detrimental effects on the carbonate supply-side. Even so, variations in shell weight showed that net calcification was reduced under elevated CO_2 and reduced Ph, although the magnitude and significance of this effect varied among size-classes. Most of the loss of shell material probably occurred as post-deposition dissolution in the internal aragonitic nacre layer. Our results show that, even when reared under extreme levels of CO_2-induced acidification, juvenile M. galloprovincialis can continue to calcify and grow in this coastal lagoon environment. The complex responses of bivalves to ocean acidification suggest a large degree of interspecific and intraspecific variability in their sensitivity to this type of perturbation. Further research is needed to assess the generality of these patterns and to disentangle the relative contributions of acclimation to local variations in seawater chemistry and genetic adaptation.
机译：通过扩散纯CO_2，实验性地控制了Ria Formosa泻湖中的海水的碳酸盐化学性质，以实现相对于未处理的海水两个减少的pH值，分别为-0.3和-0.6 Ph单位。暴露84天后，未发现贻贝Mytilus galloprovincialis的生长（体细胞或壳）或死亡率方面的差异。海水的总碱度自然升高（≈3550μmolkg〜（-1）），即使在超过4000μatm的Pco_2值下，也可以防止CaCO_3饱和度降低，从而减弱了对碳酸盐供应方的不利影响。即便如此，壳重量的变化表明，在增加的CO_2和降低的Ph值下，净钙化作用降低了，尽管这种影响的大小和重要性在不同尺寸级别之间也有所不同。壳材料的大部分损失可能是沉积后溶解在内部文石珍珠层中。我们的结果表明，即使在极端的CO_2诱导的酸化条件下饲养时，在此沿海泻湖环境中，幼稚的M. galloprovincialis仍会继续钙化和生长。双壳类动物对海洋酸化的复杂反应表明，它们对这种摄动的敏感性存在很大的种间和种内变异性。需要进一步的研究来评估这些模式的普遍性，并弄清适应对海水化学和遗传适应的局部变化的相对贡献。

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    P. Range; D. Pilo; R. Ben-Hamadou; MA Chicharo; D. Matias; S.Joaquim; A.P. Oliveira; L Chicharo;

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    Centro de Ciencias do Mar (CCMAR), Universidade do Algarve, Campus de Gambelas, 8005-139 Faro, Portugal;

    Universidade do Algarve, Faculdade de CiSncias e Tecnologia, Departamento de Ecologia e Recursos Vivos, Campus de Cambelas, 8005-139 faro, Portugal;

    Centro de Ciencias do Mar (CCMAR), Universidade do Algarve, Campus de Gambelas, 8005-139 Faro, Portugal;

    Centro de Ciencias do Mar (CCMAR), Universidade do Algarve, Campus de Gambelas, 8005-139 Faro, Portugal,Universidade do Algarve, Faculdade de CiSncias e Tecnologia, Departamento de Ecologia e Recursos Vivos, Campus de Cambelas, 8005-139 faro, Portugal;

    Institute Portugues do Mar e da Atmosfera, I. P., Av. 5 de Outubro, 8700-305 Olhao, Portugal;

    Institute Portugues do Mar e da Atmosfera, I. P., Av. 5 de Outubro, 8700-305 Olhao, Portugal;

    Institute Portugues do Mar e da Atmosfera, I. P., Av. Brasilia, 1449-006 Lisboa, Portugal;

    Universidade do Algarve, Faculdade de CiSncias e Tecnologia, Departamento de Ecologia e Recursos Vivos, Campus de Cambelas, 8005-139 faro, Portugal;

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  • 正文语种 eng
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  • 关键词

    molluscs; calcium carbonate; carbon dioxide; climate change; groundwater; physiology;

    机译：软体动物碳酸钙二氧化碳;气候变化;地下水;生理;

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