Record Display for the EPA National Library Catalog

RECORD NUMBER: 74 OF 190

OLS Field Name OLS Field Data
Main Title in situ Evaluation of Nutrient Effects in Lakes.
Author Jorda, Robert A. ; Bende, Michael E. ;
CORP Author Virginia Inst. of Marine Science, Gloucester Point.
Year Published 1973
Report Number EPA-16010-HIU; 11070,; R3-73-018
Stock Number PB-221 341
Additional Subjects ( Lakes ; Primary biological productivity) ; ( Phytoplankton ; Ecology) ; Nutrients ; Nitrogen ; Phosphorus ; EDTA ; Populations ; Limnology ; Chelates ; Sewage ; Stimulation ; Evaluation ; Experimental design ; Plant growth ; Water pollution ; Eutrophication ; Limiting factors ; Acetic acid/nitrilo-tri ; Water pollution effects(Plants)
Holdings
Library Call Number Additional Info Location Last
Modified
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Status
NTIS  PB-221 341 Most EPA libraries have a fiche copy filed under the call number shown. Check with individual libraries about paper copy. NTIS 06/23/1988
Collation 228p
Abstract
A method for performing in situ nutrient enrichment experiments on natural lake phytoplankton communities was developed and evaluated. One set of experiments in which it was employed was designed to detect limiting nutrients and to provide a basis for predicting future experiment results. Individual species responded differently to different treatments, and interactions among the treatment variables were important in shaping the community responses to mixtures of two or three variables. The most consistent features of the productivity results were incorporated into a 'most probable response pattern,' which was partially validated by a second series of experiments. The second experiment series was also used to test the ability of NTA to stimulate phytoplankton productivity. In a third series of experiments sewage effluents were tested in parallel with N and P. Recommendations for the use of in situ enrichment experiments in eutrophication studies are presented. (Modified author abstract)