Record Display for the EPA National Library Catalog


OLS Field Name OLS Field Data
Main Title Effects of Fluorene on Microcosms Developed from Four Natural Communities (Journal Version).
Author Stay, F. S. ; Katko, A. ; Rohm, C. M. ; Fix, M. A. ; Larsen, D. P. ;
CORP Author Environmental Research Lab.-Duluth, MN. ;Northrop Services, Inc., Corvallis, OR.
Publisher 1988
Year Published 1988
Report Number EPA/600/J-88/230;
Stock Number PB89-134852
Additional Subjects Aquatic microbiology ; Toxicity ; Fluorenes ; Bioassay ; Respiration ; Plankton ; Ponds ; Predictions ; Concentration(Composition) ; Reprints ; Aquatic ecosystems ; Water pollution effects(Animals) ; Microcosms
Library Call Number Additional Info Location Last
NTIS  PB89-134852 Most EPA libraries have a fiche copy filed under the call number shown. Check with individual libraries about paper copy. NTIS 06/08/1989
Collation 12p
Ecosystem-level responses were examined in microcosms developed from four different natural plankton communities and exposed to nominal concentrations of 0.12, 0.50, 2.0, 5.0 and 10.0 mg/L fluorene. The lowest observed effect level (LOEL) for dark respiration was 0.12 mg/L fluorene in three of the four communities during the first 14 d; in the fourth community, it was 5.0 mg/L. The LOEL of the net productivity/respiration ratio was 0.12 mg/L in all four communities. These results suggest that the responses of these microcosms were not completely independent of their source communities. The sensitivities or LOEL values from these microcosm experiments were as low as those reported for chronic bioassays of the three most sensitive of seven standard test organisms. Comparisons between the responses of these microcosms and those reported for experimental ponds exposed to the same concentrations of fluorene suggest that these microcosms accurately reflect the types of changes and concentrations that cause change in pond ecosystems.