Marine Science and Technology Institute, College of Environmental Science and Engineering, Yangzhou University, Yangzhou, 225127, China.
Jiangsu Key Laboratory of Marine Bioresources and Environment, Jiangsu Ocean University, Lianyungang, 222005, China.
Environ Sci Pollut Res Int. 2024 Aug;31(40):53291-53303. doi: 10.1007/s11356-024-34782-w. Epub 2024 Aug 26.
To compare the different effects of petroleum hydrocarbons on intertidal Ulva macroalgae, three dominant Ulva species (U. prolifera, U. linza, and U. lactuca) were exposed to two water-accommodated fractions (WAFs) of 0 diesel oil and crude oil at three concentration levels. The results indicated that two WAFs had significant concentration effects on the physiological characteristics of Ulva, the toxicity of 0 diesel oil was greater than crude oil, and crude oil had hormesis effect. Exposure of high WAFs concentrations, the growth, pigment, carbohydrate, and protein contents of Ulva were inhibited, while the antioxidant system was activated. In addition, the integrated biomarker response (IBR) indicated that U. prolifera had higher resistance to WAFs than U. linza and U. lactuca. Considering that U. prolifera is the main species of green tide in the Yellow Sea (YS) of China, the comparative effects of WAFs on different development stages of U. prolifera were also explored. The results showed that spore was the most sensitive to WAFs, while adult thalli was the most tolerant. The increased resistance of U. prolifera thalli and the hormesis effect triggered by crude oil may influence the outbreak scale of green tides. This study provides a new perspective for understanding the formation of green tides in the YS.
为了比较石油烃对潮间带大型绿藻的不同影响，将三种优势大型绿藻（U. prolifera、U. linza 和 U. lactuca）暴露于两种水可容纳馏分（WAFs）的 0 号柴油和原油中，浓度水平分别为三个。结果表明，两种 WAFs 对绿藻的生理特性有显著的浓度效应，0 号柴油的毒性大于原油，而原油具有激素效应。高 WAFs 浓度的暴露会抑制绿藻的生长、色素、碳水化合物和蛋白质含量，而抗氧化系统被激活。此外，综合生物标志物响应（IBR）表明，U. prolifera 对 WAFs 的抗性高于 U. linza 和 U. lactuca。考虑到 U. prolifera 是中国黄海（YS）绿潮的主要物种，还探讨了 WAFs 对不同发育阶段 U. prolifera 的比较影响。结果表明，孢子对 WAFs 最为敏感，而成体藻体则最为耐受。U. prolifera 藻体的抗逆性增加和原油引发的激素效应可能会影响绿潮的爆发规模。本研究为理解 YS 绿潮的形成提供了新的视角。
