Cycling of xenobiotics through marine and estuarine sediments




D'Asaro CN
Wilkes FG
University of West Florida PUDoB

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The results of five broadly defined projects are reported. Cycling of xenobiotics was studied with a photobioassay system that used time-lapse photography to evaluate effects of Kepone and sodium pentachlorophenate on feeding activity of the lugworm, Arenicola cristata . Radio-labeled methyl parathion was used to demonstrate fate and effect in microcosms inhabited by lugworms. Uptake and depuration of chrysene by lugworms was evaluated in a flow-through system. A toxic sediment bioassay system was developed to provide a means to test effects of dredge spoil. Keponesorbed sediment and dredge spoil from James River and Houston Ship Channel were tested for 28 days. Long-term tests (100 days), with the same systems, were used to evaluate effects of a specific drilling mud from an an active exploratory platform. Predator-prey tests of sublethal effects of xenobiotics demonstrated effect in one-prey and two-prey systems. Evaluation of sublethal effects, such as avoidance of pollution gradients, was studied in a trough-type avoidance-response system. Tests with pinfish demonstrated that they will avoid chlorine-produced oxidants. Usefulness of small-scale microcosms was evaluated by developing methods to culture polychaetes and crustaceans. Various aspects of the biology of selected species were studied




Arenicola cristata, bioassays, biogeochemical cycle, Dredge spoil, drilling fluids, Environmental impact, estuaries, marine environment, marine environments, marine organisms, O 4020 POLLUTION - ORGANISMS, offshore operations, P 1000 MARINE POLLUTION, pesticides, Pollution, pollution effects, Q1 01502 Methods and instruments, Q1 01503 Characteristics,behavior and fate, Q1 01504 Effects on organisms, Q2 02187 Geochemistry of sediments, Q2 02442 Methods and instruments, Q2 02445 Characteristics,behavior and fate, Sediment pollution, Sediments, USA