[Joint acute toxicity of fipronil and bata-cypermethrin to protozoa community].
Compared with the toxicity test on single organism, the effects of toxic pollutants on organisms at community level are more reliable. The acute single and joint toxic effects of Fipronil and Bata-cypermethrin on freshwater protozoa community are studied in this paper. The results show that the 48h-LC50 of Fipronil and Bata-cypermethrin to the microbial community was 35.83mg x L(- 1), 1.92mg x L(-1), the joint toxicity of Bata-cypermethrin and Fipronil was antagonism in 48h with toxicity 1: 1 to freshwater protozoa community, and Additive Index was -0.08. The structure of protozoa community would change in a low concentration of Bata-cypermethrin and Fipronil mixture; the species and population of Algivores(A) and Predators Raptors (P) would reduce but Bactivoresdetrivores(B) would become predominant relatively.
Liu
Guo-guang
GG
Henan Key Laboratory for Environmental Pollution control, College of Chemistry and Environmental Science, Henan Normal University, Xinxiang 453002, China. guoguangliu@263.net
Xu
Hai-juan
HJ
Wang
Li-xia
LX
Zheng
Li-qing
LQ
D000818:Animals; D056890:Eukaryota / Q000187:drug effects*; D007306:Insecticides / Q000633:toxicity*; D011157:Population Dynamics; D011720:Pyrazoles / Q000633:toxicity*; D011722:Pyrethrins / Q000633:toxicity*; D023382:Toxicity Tests, Acute / Q000379:methods
D007306:Insecticides; D011720:Pyrazoles; D011722:Pyrethrins; C017160:cypermethrin; C082360:fipronil