Recent research indicates that synchronicity of sexual reproduction in coral spawning events is breaking down, leading to aging populations and decreased recruitment success. In this perspective, we develop a hypothesis that this phenomenon could be caused by ongoing ocean acidification (OA). We hypothesize, that the underlying physiological machinery could be the carbon concentrating mechanism (CCM). The endosymbiotic zooxanthellae of corals could use this mechanism to sense calm water motion states in a comparable way to that known from macroalgae. In macroalgae, it is well-established that dissolved inorganic carbon (DIC) acts as the trigger for signaling low water motion. Hence, evolutionarily developed signals of low water motion, suited for gamete-release, may be misleading in the future, potentially favoring opportunistic species in a broad range of marine organisms.

中文翻译：

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海洋生物的有性繁殖对海洋酸化有何反应？

最近的研究表明，珊瑚产卵事件中有性生殖的同步性正在减弱，从而导致人口老龄化和招募成功率下降。从这个角度出发，我们提出了一个假设，即这种现象可能是由于正在进行的海洋酸化（OA）引起的。我们假设，潜在的生理机制可能是碳浓缩机制（CCM）。珊瑚的内共生虫黄藻可以利用这种机制来感知平静的水运动状态，其方式与大型藻类已知的方式相当。在大型藻类中，众所周知，溶解的无机碳（DIC）充当了低水位运动的信号触发。因此，未来会逐渐发展出适合配子释放的低水运动信号，这可能会在未来产生误导，