title: Influence of benzene on the phytoplankton and on Daphnia pulex in compartments of an experimental pond.
abstract: Benzene, with initial concentrations of 100 and 50 mg per liter, was dosed in duplicates into four compartments of a small pond. The decrease of chemical concentration in the water was exponential with a mean half-life of 4.7 +/- 0.9 days. Following benzene application, the phytoplankton density and diversity slightly increased relative to the controls. Both concentrations were lethal for the daphnids present. During 24-hr in vitro tests with Daphnia pulex (initial benzene concentrations less than 50 mg per liter), a direct correlation between mobility and decreasing chemical concentration was observed.
mesh_terms: D000818:Animals; D001554:Benzene / Q000494:pharmacology*; D003621:Daphnia / Q000187:drug effects*; D004305:Dose-Response Relationship, Drug; D006207:Half-Life; D006863:Hydrogen-Ion Concentration; D010100:Oxygen / Q000032:analysis; D010839:Phytoplankton / Q000187:drug effects*; D010933:Plankton / Q000187:drug effects*; D012995:Solubility; D013696:Temperature; D014874:Water Pollutants, Chemical
chemical_list: D014874:Water Pollutants, Chemical; D001554:Benzene; D010100:Oxygen