Caffeine is present in coastal environments worldwide and there is a need to assess its impact on marine organisms. Here, we exposed two species of ecologically important marine macroalgae ( Chondrus crispus and Codium fragile subsp. fragile ) to a suite of caffeine concentrations and measured their response. Caffeine concentrations of 10–100 ng L −1 had no significant effect on the growth rate or photosynthetic efficiency of either algae. Extremely high concentrations (100–200 mg L −1 ), which may occur acutely, produced sublethal effects for both species and mortality in C. fragile subsp . fragile. Our results highlight the need to understand how caffeine impacts marine species.

中文翻译：

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咖啡因对海洋大型藻类生长和光合效率的影响

咖啡因存在于全世界的沿海环境中，有必要评估其对海洋生物的影响。在这里，我们将两种对生态具有重要意义的海洋大型藻类（软骨脆皮和脆弱的亚细小球藻）暴露于一组咖啡因中，并测量了它们的响应。咖啡因浓度为10–100 ng L -1对两种藻类的生长速率或光合效率均无显着影响。可能会突然发生的极高浓度（100–200 mg L -1）对脆弱的隐孢子虫的物种和死亡率均产生亚致死作用。脆弱的。我们的结果强调需要了解咖啡因如何影响海洋物种。