Record Display for the EPA National Library Catalog


OLS Field Name OLS Field Data
Main Title Use of MERL Microcosms to Study the Fates and Effects of Marine Pollutants.
Author Pilson, Michael E. Q. ; Vargo, Gabriel ; Hunt, Carlton ; Gearing, Juanita ; Gearing, Patrick ;
CORP Author Rhode Island Univ., Kingston. Graduate School of Oceanography.;Environmental Research Lab., Narragansett, RI.
Year Published 1979
Report Number EPA-R-807795; EPA-600/D-82-213 ; ERLN-X25
Stock Number PB82-181918
Additional Subjects Marine atmospheres ; Oceans ; Toxicology ; Narragansett Bay ; Benthos ; Hydrocarbons ; Metals ; Ecosystems ; Chemical compounds ; Phytoplankton ; Zooplankton ; Exposure ; Water pollution ; Micrososms ; Water pollution efects(Animals) ; Path of pollutants ; Trace techniques ; Toxic substances
Library Call Number Additional Info Location Last
NTIS  PB82-181918 Most EPA libraries have a fiche copy filed under the call number shown. Check with individual libraries about paper copy. 06/23/1988
Collation 25p
Informed regulation of the discharge of chemical pollutants into the oceans requires knowledge of the fates and effects of such substances in the regions of concern. In order to provide a capability for realistic controlled experiments, microcosms of a plankton-based coastal marine ecosystem with a benthic component have been set up in 12 tanks outdoors, each with a 5-m deep water column, 13 tons of water and one ton of sediment. The tanks are mixed to achieve proper turbulence, and illuminated with natural sunlight. The behavior of these systems was compared to that of adjacent Narragansett Bay, the source of water and sediments. Experiments have been carried out with hydrocarbons, various tracers, and the scaling of physical parameters. Results from operations through two annual cycles demonstrate that in both chemical and biological composition and chemical and biological processes and annual cycling the systems behaved in ways remarkably similar to comparable regions in Narragansett Bay. Concentrations and fluxes of nutrients and trace metals followed closely those of adjacent Narragansett Bay. Phytoplankton, zooplankton and benthic animals were similar to the Bay in species composition. Biomass estimates were low but generally within bay ranges. The similarity in chemical cycles between microcosms and the coastal ecosystem suggests that many pollutant substances should behave in the microcosms as they do in the field. Examples of some experiments with hydrocarbons and trace metals are presented.