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首页> 外文期刊>Journal of Experimental Marine Biology and Ecology >Indirect effects may buffer negative responses of seagrass invertebrate communities to ocean acidification
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Indirect effects may buffer negative responses of seagrass invertebrate communities to ocean acidification

机译：间接影响可能会缓解海草无脊椎动物群落对海洋酸化的负面反应

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摘要

Ocean acidification has been shown to have highly variable effects, with many negative and some positive responses from individual species, while community level effects are largely unknown. Although an overall loss of biodiversity is expected, predicting the effects of ocean acidification on whole assemblages can be problematic as both direct and indirect effects of acidification must be taken into consideration. This study demonstrates how invertebrate assemblages associated with the highly productive seagrass, Posidonia oceanica, respond to natural acidification that occurs at CO_2 vents off the coast of Italy. We examined seasonal differences in invertebrate community structure between two distinct pH zones: control (pH 8.1) and acidified (pH 7.8) and show that many groups of invertebrate taxa were robust to acidification effects. Differences in community structure appeared to be driven by the indirect effects of acidification, such as changes to canopy structure and food availability, rather than physiological intolerance to low pH. The number of invertebrates collected in acidified stations was almost double that of control stations during the study and many heavily calcified species appeared to thrive. These results highlight how positive indirect effects may buffer the ecological impacts of acidification, and provide evidence that this highly productive, nearshore habitat may provide refuge to its associated communities from future ocean acidification.
机译：已证明海洋酸化具有高度可变的影响，单个物种有许多负面和正面反应，而社区层面的影响在很大程度上是未知的。尽管预计生物多样性将整体丧失，但由于必须同时考虑酸化的直接和间接影响，因此预测海洋酸化对整个种群的影响可能是有问题的。这项研究表明，与高产海草波塞冬藻相关的无脊椎动物组合如何应对意大利沿海CO_2排放口发生的天然酸化。我们检查了两个不同的pH区域之间的无脊椎动物群落结构的季节性差异：对照（pH 8.1）和酸化（pH 7.8），并显示出许多无脊椎动物类群对酸化作用具有较强的抵抗力。群落结构的差异似乎是由酸化的间接作用驱动的，例如冠层结构的变化和食物的可获得性，而不是生理上对低pH的耐受性。在研究期间，在酸化站收集的无脊椎动物数量几乎是控制站的无脊椎动物数量，并且许多钙化严重的物种似乎繁衍生息。这些结果凸显了积极的间接影响可以如何缓冲酸化的生态影响，并提供证据表明，这种高产的近岸生境可能为未来的海洋酸化提供庇护。

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