title: The growth behavior of three marine phytoplankton species in the presence of commercial cypermethrin.
abstract: 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.
authors.affiliation: Institute of Hydrobiology, Jinan University, Guangzhou 510632, PR China.
authors.forename: Zhao-Hui
authors.initials: ZH
authors.lastname: Wang
authors.forename: Yu-feng
authors.initials: YF
authors.lastname: Yang
authors.forename: Wen-Jie
authors.initials: WJ
authors.lastname: Yue
authors.forename: Wei
authors.initials: W
authors.lastname: Kang
authors.forename: Wen-Jun
authors.initials: WJ
authors.lastname: Liang
authors.forename: Wei-Jie
authors.initials: WJ
authors.lastname: Li
mesh_terms: D018533:Biomass; D002681:China; D004305:Dose-Response Relationship, Drug; D004784:Environmental Monitoring / Q000379:methods*; D010839:Phytoplankton / Q000187:drug effects* / Q000254:growth & development*; D011722:Pyrethrins / Q000633:toxicity*; D013045:Species Specificity; D014874:Water Pollutants, Chemical / Q000633:toxicity*
chemical_list: D011722:Pyrethrins; D014874:Water Pollutants, Chemical; C017160:cypermethrin