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A two-species marine algal bioassay for detecting aquatic toxicity of chemical pollutants



A two-species marine algal bioassay for detecting aquatic toxicity of chemical pollutants



Water research8(2): 187-194



A simple, rapid and sensitive two-species marine algal bioassay for determining the toxicity of chemical pollutants was developed. The bioassay employs the marine diatoms Phaeodactylum tricornutum (clone Phaeo) and Cyclotella cryptica (clone 03A), which were selected after screening 40 clones of 32 species for an optimum pair of organisms. These algae are easily grown in the laboratory, and the cells can be differentiated and counted with an electronic particle counter. Alteration of species ratio and/or total biomass were used to determine toxicity. Polychlorinated biphenyls (PCB, Aroclor 1254) at 10 parts per thousand million (109; ptm) significantly altered species ratio in favor of Phaeo, and 10 ptm of DDT (1,1,1-trichloro-2,2-bis(p-chlorophenyl)ethane) and 20 ptm of dieldrin produced a significant species alteration opposite to that produced by PCB.

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Accession: 014927578

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DOI: 10.1016/0043-1354(84)90068-x


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