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首页> 外文期刊>Environmental Science & Technology >Impacts of Near-Future Ocean Acidification and Warming on the Shell Mechanical and Geochemical Properties of Gastropods from Intertidal to Subtidal Zones
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Impacts of Near-Future Ocean Acidification and Warming on the Shell Mechanical and Geochemical Properties of Gastropods from Intertidal to Subtidal Zones

机译：近期海洋酸化和变暖对潮间带至潮下带腹足动物壳力学和地球化学性质的影响

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摘要

Many marine organisms produce calcareous shells as the key structure for defense, but the functionality of shells may be compromised by ocean acidification and warming. Nevertheless, calcifying organisms may adaptively modify their shell properties in response to these impacts. Here, we examined how reduced pH and elevated temperature affect shell mechanical and geochemical properties of common grazing gastropods from intertidal to subtidal zones. Given the greater environmental fluctuations in the intertidal zone, we hypothesized that intertidal gastropods would exhibit more plastic responses in shell properties than subtidal gastropods. Overall, three out of five subtidal gastropods produced softer shells at elevated temperature, while intertidal gastropods maintained their shell hardness at both elevated pCO_2 (i.e., reduced pH) and temperature. Regardless of pH and temperature, degree of crystallization was maintained (except one subtidal gastropod) and carbonate polymorph remained unchanged in all tested species. One intertidal gastropod produced less soluble shells (e.g., higher calcite/aragonite) in response to reduced pH. In contrast, subtidal gastropods produced only aragonite which has higher solubility than calcite. Overall, subtidal gastropods are expected to be more susceptible than intertidal gastropods to shell dissolution and physical damage under future seawater conditions. The increased vulnerability to shell dissolution and predation could have serious repercussions for their survival and ecological contributions in the future subtidal environment.
机译：许多海洋生物生产钙质贝壳作为防御的关键结构，但是海洋酸化和变暖可能会损害贝壳的功能。然而，钙化生物可以响应于这些影响而适应性地改变其壳的性质。在这里，我们研究了pH降低和温度升高如何影响潮间带至潮下带常见放牧腹足动物的壳机械和地球化学特性。鉴于潮间带腹足类动物的环境波动较大，我们假设潮间带腹足类动物的壳性比潮下腹足类动物表现出更多的塑性响应。总体而言，潮间带腹足动物中有五分之三在升高的温度下产生了较软的壳，而潮间带腹足动物在升高的pCO_2（即降低的pH）和温度下都保持了壳的硬度。无论pH和温度如何，在所有测试的物种中，结晶度均保持不变（一个潮下腹足纲除外），并且碳酸盐多晶型物保持不变。一种潮间带腹足动物响应于降低的pH产生了较少的可溶壳（例如，较高的方解石/文石）。相反，潮下腹足动物仅产生文石的溶解度比方解石高的文石。总体而言，在未来的海水条件下，潮下腹足类动物比潮间腹足类动物更容易受到壳层溶解和物理破坏的影响。贝壳溶解和捕食的脆弱性增加，可能会对它们在未来的潮下环境中的生存和生态贡献产生严重影响。

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  • 来源
    《Environmental Science & Technology》 |2017年第21期|12097-12103|共7页
  • 作者

    Jonathan Y. S. Leung; Sean D. Connell; Ivan Nagelkerken; Bayden D. Russell;

  • 作者单位

    Southern Seas Ecology Laboratories, The Environment Institute and School of Biological Sciences, The University of Adelaide, Adelaide 5005, South Australia, Australia;

    Southern Seas Ecology Laboratories, The Environment Institute and School of Biological Sciences, The University of Adelaide, Adelaide 5005, South Australia, Australia;

    Southern Seas Ecology Laboratories, The Environment Institute and School of Biological Sciences, The University of Adelaide, Adelaide 5005, South Australia, Australia;

    Southern Seas Ecology Laboratories, The Environment Institute and School of Biological Sciences, The University of Adelaide, Adelaide 5005, South Australia, Australia,The Swire Institute of Marine Science and School of Biological Sciences, The University of Hong Kong, Hong Kong SAR, China;

  • 收录信息 美国《科学引文索引》(SCI);美国《工程索引》(EI);美国《生物学医学文摘》(MEDLINE);美国《化学文摘》(CA);
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