College of Marine Ecology and Environment, Shanghai Ocean University, Shanghai 201306, China.
College of Marine Ecology and Environment, Shanghai Ocean University, Shanghai 201306, China.
Mar Pollut Bull. 2023 Sep;194(Pt B):115357. doi: 10.1016/j.marpolbul.2023.115357. Epub 2023 Aug 12.
Since 2007, green tides have occurred almost every year in the Yellow Sea, and a method to prevent them and to control levels of attached Ulva prolifera is urgently needed. In this study, we measured the effects of different concentrations of citric acid-activated chlorine dioxide solution (0, 50, 100, 150, 200, and 250 mg/L of chlorine dioxide) on the morphology (macrostructure and microstructure), chlorophyll a content, chlorophyll b content, carotenoid content, and chlorophyll fluorescence parameters (Fv/Fm, Y (II), NPQ, and ETRmax) of U. prolifera. Micropropagules in the treatment filtrate were cultured to determine whether the solution reduced the number of micropropagules released during the treatment process. The results showed that citric acid-activated chlorine dioxide at the appropriate concentration can be applied to remove U. prolifera from Neopyropia cultivation rafts. Because U. prolifera and its micropropagules died in the 250 mg/L chlorine dioxide group, we recommend that the appropriate concentration of chlorine dioxide for removing green macroalgae is ≥250 mg/L. Our results provide a scientific basis for convenient collection of accurate data for the U. prolifera prevention trial organized by the Ministry of Natural Resources of the People's Republic of China.
自 2007 年以来，黄海几乎每年都会发生绿潮，因此急需找到一种既能预防绿潮又能控制附着性浒苔数量的方法。本研究采用柠檬酸活化二氧化氯溶液（0、50、100、150、200 和 250mg/L 二氧化氯）处理浒苔，测量了不同浓度的柠檬酸活化二氧化氯溶液对浒苔形态（宏观结构和微观结构）、叶绿素 a 含量、叶绿素 b 含量、类胡萝卜素含量、叶绿素荧光参数（Fv/Fm、Y（Ⅱ）、NPQ 和 ETRmax）的影响。并将处理滤液中的微繁殖体培养起来，以确定该溶液是否能降低处理过程中释放的微繁殖体数量。结果表明，柠檬酸活化二氧化氯在适当的浓度下可用于去除紫菜养殖筏上的浒苔。由于 250mg/L 二氧化氯组中的浒苔及其微繁殖体全部死亡，我们建议去除绿藻的适宜二氧化氯浓度应≥250mg/L。本研究结果为自然资源部组织的浒苔防控试验提供了方便收集准确数据的科学依据。
