Record Display for the EPA National Library Catalog


Main Title Multivariate Analysis of Experimental Marine Ecosystems.
Author Oviatt, C. A. ; Perez, K. T. ; Nixon, S. W. ;
CORP Author Rhode Island Univ., Kingston. Graduate School of Oceanography.;Environmental Research Lab., Narragansett, RI.
Year Published 1977
Report Number EPA/600/J-77/166;
Stock Number PB-299 348
Additional Subjects Benthos ; Marine biology ; Sewage disposal ; Narragansett Bay ; Invertebrates ; Multivariate analysis ; Time series analysis ; Experimental design ; Salinity ; Fresh water ; Sediments ; Chlorophylls ; Salt water ; Nutrients ; Concentration(Composition) ; Light(Visible radiation) ; Comparison ; Pelagic zone ; Rhode Island ; Reprints ; Microcosms ; Ecosystems ; Ocean waste disposal ; Eutrophication ; Bioindicators
Library Call Number Additional Info Location Last
NTIS  PB-299 348 Some EPA libraries have a fiche copy filed under the call number shown. 07/26/2022
Collation 11p
Twelve replicate 150-l laboratory microcosms were developed using whole water samples and natural benthic communities from Narragansett Bay, Rhode Island (USA). The microcosms were scaled to the bay in terms of salinity, temperature, light input, volume pelagic community to area of benthic community, density of macrofauna, turbulent mixing, and flushing time. The microcosms were self maintaining during a six month study period with over 35 species of phytoplankton and 30 species of macro-invertebrates. Some 25 species of macroplankton entered the microcosms and successfully colonized the benthic communities. Zooplankton were present in all life stages. After an initial study of replication among the 12 tanks, the microcosms were perturbed with 3 levels of treated urban sewage for a three month period. Three microcosms were maintained at each level with 3 tanks remaining as controls. At the end of 3 months, the sewage input was terminated and the response of the systems was followed for an additional 2 months. Both time series data and multivariate statistical analysis of over 10 different parameters indicated that the replication of the microcosms was adequate to show the effects of experimental treatments.