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Polychlorinated Biphenyls and DDT Alter Species Composition in Mixed Cultures of Algae

Jerry L. Mosser, Nicholas S. Fisher and Charles F. Wurster
Science
New Series, Vol. 176, No. 4034 (May 5, 1972), pp. 533-535
Stable URL: http://www.jstor.org/stable/1734682
Page Count: 3
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Polychlorinated Biphenyls and DDT Alter Species Composition in Mixed Cultures of Algae
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Abstract

Either DDT or polychlorinated biphenyls were added to mixed cultures containing a marine diatom and a marine green alga that were sensitive and resistant, respectively, to these organochlorine compounds. The diatom grew faster and was therefore dominant in control cultures, but its dominance diminished in treated cultures, even at concentrations of chlorinated hydrocarbons that had no apparent effect in pure cultures. Such stable pollutants could disrupt the species composition of phytoplankton communities, thereby affecting whole ecosystems.

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