The growth behavior of three marine phytoplankton species in the presence of commercial cypermethrin.
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.
Wang
Zhao-Hui
ZH
Institute of Hydrobiology, Jinan University, Guangzhou 510632, PR China.
Yang
Yu-feng
YF
Yue
Wen-Jie
WJ
Kang
Wei
W
Liang
Wen-Jun
WJ
Li
Wei-Jie
WJ
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*
D011722:Pyrethrins; D014874:Water Pollutants, Chemical; C017160:cypermethrin