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首页> 外文期刊>Oceanographic Literature Review >Ocean acidification and mollusc settlement in posido-nia oceanica meadows: Does the seagrass buffer lower ph effects at CO_2 vents?
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Ocean acidification and mollusc settlement in posido-nia oceanica meadows: Does the seagrass buffer lower ph effects at CO_2 vents?

机译：海洋酸化和软体动物沉降在Posidonia Oceanica Meadows：海草缓冲液在CO_2通风口较低的pH效果吗？

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Ocean acidification has been broadly recognised to have effects on the structure and functioning of marine benthic communities. The selection of tolerant or vulnerable species can also occur during settlement phases, especially for calcifying organisms which are more vulnerable to low pH-high pCO_2 conditions. Here, we use three natural CO_2 vents (Castello Aragonese north and south sides, and Vullatura, Ischia. Italy) to assess the effect of a decrease of seawater pH on the settlement of Mollusca in Posido-nia oceanica meadows, and to test the possible buffering effect provided by the seagrass. Artificial collectors were installed and collected after 33 days, during April-May 2019, in three different microhabitats within the meadow (canopy, bottom/rhizome level, and dead matte without plant cover), following a pH decreasing gradient from an extremely low pH zone (pH ＜ 7.4), to ambient pH conditions (pH = 8.10). A total of 4659 specimens of Mollusca, belonging to 57 different taxa, were collected. The number of taxa was lower in low and extremely low pH conditions. Reduced mollusc assemblages were reported at the acidified stations, where few taxa accounted for a high number of individuals. Multivariate analyses revealed significant differences in mollusc assemblages among pH conditions, microhabitat, and the interaction of these two factors. Acanthocardia echinata, Alvania lineata, Alvania sp. juv, Eatonina fulgida, Hiatella arc-tica, Mytilys galloprovincialis, Musculus subpictus, Phorcus sp. juv, and Rissoa variabilis were the species mostly found in low and extremely low pH stations, and were all relatively robust to acidified conditions. Samples placed on the dead matte under acidified conditions at the Vullatura vent showed lower diversity and abundances if compared to canopy and bottom/rhizome samples, suggesting a possible buffering role of the Posidonia on mollusc settlement. Our study provides new evidence of shifts in marine benthic communities due to ocean acidification and evidence of how P. oceanica meadows could mitigate its effects on associated biota in light of future climate change.
机译：广泛认识到海洋酸化对海洋底栖社区的结构和运作产生影响。在沉降阶段也可以出现耐受性或弱势物质的选择，特别是对于钙化的生物，其更容易受到低pH-HIGPCO_2条件。在这里，我们使用三个天然CO_2通风口（Castello Aragonese North Side，以及Vullatura，Ischia），评估海水pH降低对Posido-Nia Oceanica Meadows中软体动物沉降的影响，并测试可能海草提供的缓冲效果。在2019年4月至2019年4月，在2019年4月至2019年5月，在草地上的三种不同的微藻（底部/根茎水平和无植物覆盖的死哑物中，在从极低的pH区降低梯度之后，在三种不同的微藻中安装和收集（pH <7.4），到环境pH条件（pH = 8.10）。收集了归属于57种不同的分类群的软体动物标本。含税的数量低，低pH条件下降。在酸化站报道了减少的软体动物组合，其中很少有征收占批大众人数。多变量分析揭示了对pH条件，微藻酸的软体动物组合的显着差异，以及这两个因素的相互作用。 acantocardia echinata，alvania lineata，alvania sp。 juv，伊顿氨汁骨，Hiatella arc-tica，mytilys galloprovincialis，musculus subpictus，phorcus sp。 Juv和Rissoa Variabilis是大多数在低位和极低的pH位的物种，并且对酸化条件相对较强。如果与冠层和底部/根茎样品相比，瓦拉特拉通风口的酸化条件下放置在死遮罩上的样品呈较低的多样性和丰度，表明Posidonia对软体动物沉降的可能缓冲作用。我们的研究提供了由于海洋酸化的新底栖社区转变的新证据，以及如何根据未来的气候变化降低其对相关生物群的影响。

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  • 来源
    《Oceanographic Literature Review》 |2021年第9期|2027-2027|共1页
  • 作者

    A. Barruffo; L. Ciaralli; G. Ardizzone;

  • 作者单位

    Department of Environmental Biology University La Sapienza Roma 00185. Italy;

    Department of Environmental Biology University La Sapienza Roma 00185. Italy;

    Department of Environmental Biology University La Sapienza Roma 00185. Italy;

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