Record Display for the EPA National Library Catalog


Main Title Exploratory Analysis of Microcosm and Ecosystem Behavior Using Multivariate Techniques.
Author Oviatt, C. A. ; Walker, H. ; Pilson, M. E. Q. ;
CORP Author Rhode Island Univ., Kingston. Graduate School of Oceanography.;Environmental Research Lab., Narragansett, RI.
Year Published 1980
Report Number EPA-R-807795; EPA-600/J-80-386 ; ERLN-X20
Stock Number PB82-181876
Additional Subjects Plankton ; Ecology ; Water pollution ; Narragansett Bay ; Monitoring ; Field tests ; Nutrients ; Chlorophylls ; Differences ; Laboratories ; Comparison ; Discriminate analysis ; Divergence ; Hydrocarbons ; Metals ; Reprints ; Microcosms
Library Call Number Additional Info Location Last
NTIS  PB82-181876 Some EPA libraries have a fiche copy filed under the call number shown. 07/26/2022
Collation 15p
A conservative data set was chosen to describe ecosystem behavior; total zooplankton, chlorophyll a, ammonia, nitrite, plus nitrate, phosphate and silicate. These variables were measured weekly in the microcosms, as well as in a field survey of Narragansett Bay in 1972-73; thus a comparison data set was available. Two types of statistical techniques were used to explore the question of divergence among replicate microcosms and treatment groups (including the bay stations as treatment groups): Multiple Discriminant Analysis and Distance Statistics. The first was used to explore the major axes of variation between replicate tanks and bay stations. Distance statistics were used to describe the divergence of replicate tanks and treatment groups as a function of time.