This study assessed the effects of different electric current densities on the calcification and photosynthetic physiology of a massive, colonial stony coral species. Coral survivorship, calcification rate, and photosynthetic parameters (zooxanthellae density and chlorophyll fluorescence) were measured to determine the physiological and photosynthetic performance of Galaxea fascicularis after exposure to different electric current densities. After 60 days of treatment, survival of G. fascicularis was higher at low electric current density (10 mA m−2) than in the control and at high electric current density (100 mA m−2). Electric current did not alter zooxanthellae densities, but did enhance the photosynthetic processes (e.g. maximum electron transport rates (rETRm), and maximum quantum yield (Fv/Fm)) within 45 days. Coral calcification rate increased in response to low electric current density up to 30 days, but the effects of the electric current were not significant after a longer period of treatment. Overall, our results indicated that mineral accretion technology with appropriate electric current density conditions was somewhat helpful in enhancing coral growth, and thus this technique may be used in the restoration and management of massive stony coral reefs.

中文翻译：

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低电流密度提高了群落石珊瑚丛状珊瑚的钙化率

本研究评估了不同电流密度对大量群居石珊瑚物种钙化和光合生理的影响。测量珊瑚存活率、钙化率和光合参数（虫黄藻密度和叶绿素荧光），以确定在不同电流密度下 Galaxea fascicularis 的生理和光合性能。治疗 60 天后，在低电流密度 (10 mA m-2) 下的 G. fascicularis 存活率高于对照和高电流密度 (100 mA m-2)。电流不会改变虫黄藻的密度，但会在 45 天内增强光合作用过程（例如最大电子传输速率 (rETRm) 和最大量子产率 (Fv/Fm)）。珊瑚钙化率响应于低电流密度而增加，长达 30 天，但电流的影响在较长时间的治疗后不显着。总体而言，我们的结果表明，具有适当电流密度条件的矿物吸积技术在一定程度上有助于促进珊瑚生长，因此该技术可用于大型石珊瑚礁的恢复和管理。