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Diurnal and tidal patterns of carbon uptake and calcification in geniculate inter-tidal coralline algae

机译：膝状潮间带藻类藻类碳吸收和钙化的昼夜模式

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Research on coralline algal responses to ocean acidification and other environmental stressors has increased in recent years as coralline algae is thought to stand a higher chance of being affected by acidification stress than other macroalgae. To provide context and enhance the existing eco-physiological framework for climate change studies, it is important to understand the effects of non-extreme stressors experienced regularly by inter-tidal coralline algae. In this study, we tested the potentially interacting effects of diurnal and tidal treatments on calcification in the geniculate coralline algae Corallina frondescens and Corallina vancouveriensis using 13C-labeled bicarbonate. Both species deposited more calcium carbonate during the day than at night, and also when submerged (high tide) compared with when emerged (low tide) in their apical and mature segments (intergenicula). These results indicate that inter-tidal coralline algae do in fact pay a cost for living inter-tidally at the edge of an adaptive zone.
机译：近年来，关于珊瑚藻对海洋酸化和其他环境胁迫的反应的研究有所增加，因为人们认为珊瑚藻比其他大型藻类更有机会受到酸化胁迫的影响。为了提供背景并增强现有的气候变化研究生态生理框架，重要的是了解潮间带珊瑚藻定期经历的非极端压力源的影响。在这项研究中，我们使用13C标记的碳酸氢盐测试了日处理和潮汐处理对膝状藻类Corallina frondescens和Corallina vancouveriensis钙化的潜在相互作用。与白天相比，这两种物种在白天都比晚上沉积更多的碳酸钙，并且在其顶端和成熟部分（种间）中相比，在淹没时（涨潮时）与出现时（低潮时）相比。这些结果表明，潮间带珊瑚藻确实为在适应带边缘的潮间带生活付出了代价。

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