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首页> 外文期刊>Marine ecology progress series >Effects of ocean acidification on overwintering juvenile Arctic pteropods Limacina helicina
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Effects of ocean acidification on overwintering juvenile Arctic pteropods Limacina helicina

机译：海洋酸化对越冬幼体翼足类天蛾Limacina helicina的影响

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摘要

Pteropods are planktonic mollusks that play an important role in the food web of various ecosystems, particularly at high latitudes. Because they produce an aragonitic shell, pteropods are expected to be very sensitive to ocean acidification driven by anthropogenic CO_2 emissions. The effect of ocean acidification was investigated using juveniles of the Arctic pteropod Limacina helicina from the Canada Basin of the Arctic Ocean. The animals were maintained in 3 controlled pH conditions (total scale pH [pH_T] ≈ 8.05, 7.90 or 7.75) for 8 d, and their mortality and the linear extension of their shell were monitored. The pH did not impact the mortality rate, but the linear extension of the shell decreased as a function of declining pH. Surprisingly, the pteropods were still able to extend their shell at an aragonite saturation state as low as 0.6. Nevertheless, dissolution marks were visible on the whole shell, indicating that calcium carbonate dissolution had also occurred, casting doubts on the ability of the pteropods to maintain a positive balance between precipitation and dissolution of calcium carbonate under corrosive conditions.
机译：翼足类是浮游性软体动物，在各种生态系统的食物网中（尤其是在高纬度地区）起着重要作用。由于翼足类动物会产生一个吻合壳，因此它们对人为CO_2排放驱动的海洋酸化非常敏感。使用来自加拿大北冰洋海盆的北极翼足类Limacina helicina的幼虫调查了海洋酸化的影响。将动物在3个受控pH条件下（总pH [pH_T] ≈8.05、7.90或7.75）保持8天，并监测其死亡率和壳的线性延伸。 pH值不会影响死亡率，但是壳的线性延伸随pH值的下降而降低。令人惊讶的是，翼足动物仍然能够以低至0.6的文石饱和状态扩展壳。然而，整个外壳上都可见到溶解痕迹，表明碳酸钙也已发生溶解，这使人们对翼足类动物在腐蚀性条件下保持碳酸钙的沉淀和溶解之间保持正平衡的能力表示怀疑。

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  • 来源
    《Marine ecology progress series》 |2012年第7期|p.279-284|共6页
  • 作者

    S. Comeau; S. Alliouane; J.-P. Gattuso;

  • 作者单位

    Centre National de la Recherche Scientifique-Institut National des Sciences de l'Univers (CNRS-INSU),Laboratoire d'Oceanographie de Villeiranche, BP 28, 06234 Villefranche-sur-Mer Cedex, France,Universite Pierre et Marie Curie-Paris 6, Observatoire Oceanologique de Villefranche, 06230 Villefranche-sur-Mer, France,Department of Biology, California State University, 18111 Nordhoff Street, Northridge,California 91330-8303, USA;

    Centre National de la Recherche Scientifique-Institut National des Sciences de l'Univers (CNRS-INSU),Laboratoire d'Oceanographie de Villeiranche, BP 28, 06234 Villefranche-sur-Mer Cedex, France,Universite Pierre et Marie Curie-Paris 6, Observatoire Oceanologique de Villefranche, 06230 Villefranche-sur-Mer, France;

    Centre National de la Recherche Scientifique-Institut National des Sciences de l'Univers (CNRS-INSU),Laboratoire d'Oceanographie de Villeiranche, BP 28, 06234 Villefranche-sur-Mer Cedex, France,Universite Pierre et Marie Curie-Paris 6, Observatoire Oceanologique de Villefranche, 06230 Villefranche-sur-Mer, France;

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  • 原文格式 PDF
  • 正文语种 eng
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  • 关键词

    ocean acidification; arctic; pteropod; shell growth;

    机译：海洋酸化;北极;翼足类壳生长;

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