Institute of Hydrobiology, Jinan University, Guangzhou 510632, PR China.
Ecotoxicol Environ Saf. 2010 Sep;73(6):1408-14. doi: 10.1016/j.ecoenv.2010.01.006. Epub 2010 Feb 1.
Toxicity of commercial cypermethrin on the growth of three marine microalgal species, Skeletonema costatum (Bacillariophyceae), Scrippsiella trochoidea (Dinophyceae) and Chattonella marina (Raphidophyceae) was separately investigated by 96 h and 24 d growth tests. The growth was stimulated at low concentrations and inhibited under high concentrations; however, overcompensation was observed at the late period of exposure under high concentrations in 24 d growth tests. The highest stimulation rates were obtained at concentration of 5 microg/L. The 24 h SC10 values were 0.91, 4.17 and 20.4 microg/L for S. costatum, S. trochoidea and C. marina, respectively. The 96 h IC50 values were 75.3, 227 and 114 microg/L for the three species, respectively. Results suggest that cypermethrin level used for sea lice controlling exert a stimulative effect on phytoplankton growth, and might result in the succession of phytoplankton community structure due to different sensitivity of species.
采用 96 h 和 24 d 生长实验，分别研究了商业拟除虫菊酯对 3 种海洋微藻（骨条藻、旋沟藻和海洋卡盾藻）生长的毒性。在低浓度下，生长受到刺激，而在高浓度下受到抑制；然而，在 24 d 生长实验的高浓度后期，观察到了过度补偿。在 5 µg/L 的浓度下，获得了最高的刺激率。S. costatum、S. trochoidea 和 C. marina 的 24 h SC10 值分别为 0.91、4.17 和 20.4 µg/L。3 种生物的 96 h IC50 值分别为 75.3、227 和 114 µg/L。结果表明，用于控制海虱的拟除虫菊酯水平对浮游植物的生长有刺激作用，由于物种敏感性不同，可能导致浮游植物群落结构的演替。
