Effects of trichlorfon on the growth of marine microalga Skeletanema costatum
LIANG Ju-fang, WANG Zhao-hui*, LIN Lang-cong
1. Department of Ecology, Jinan University, Guangzhou 510632, China; 2. Key Laboratory of Eutrophication and Red Tide Prevention of Guangdong Higher Education Institutes, Jinan University, Guangzhou 510632, China
The effects of trichlorfon, an organophosphorus pesticide, on the growth of Skeletonemacostatum were studied under laboratory conditions. The 72 h EC50 value of trichlorfon to S. costatum was 84.8 mg/L, which was far lower than that to aquatic crustaceans and fishes. The growth of S. costatum at the low concentration of trichlorfon (less than 10 mg/L) was similar to that in the control group during the 31 d chronic exposure. The growth was significantly inhibited by trichlorfon at the concentration of 50 mg/L for the first 14 d exposure; however the cell numbers kept on increasing after 15 d exposure when those in the other treatments declined. The maximum cell density in this group was up to 2.77×107 cells/mL, which was 137.7% of the control group. The growth at 100 mg/L was completely inhibited. The results suggested that the wide use of the organophosphorus pesticides such as trichlorfon would stimulate the growth of phytoplankton, and thus increase the rick of algal blooms.
梁菊芳, 王朝晖*, 林朗聪. 敌百虫对中肋骨条藻生长的影响[J]. , 2013, 32(2): 230-234.
LIANG Ju-fang, WANG Zhao-hui*, LIN Lang-cong. Effects of trichlorfon on the growth of marine microalga Skeletanema costatum. , 2013, 32(2): 230-234.
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