Record Display for the EPA National Library Catalog


Main Title Functional Responses of Laboratory Microecosystems to Chemicals from Three Structural Groups.
Author Yount, J. D. ; Shannon, L. J. ;
CORP Author Environmental Research Lab.-Duluth, MN. ;Minnesota Univ.-Duluth. Dept. of Biology.
Year Published 1986
Report Number EPA/600/D-86/239;
Stock Number PB87-116638
Additional Subjects Toxicity ; Anilines ; Alcohols ; Hazardous materials ; pH ; Aquatic animals ; Planktons ; Minnows ; Oxygen ; Concentration(Composition) ; Ecosystems ; Environmental effects ; Decanol ; Octanol ; Hexanol ; Aniline/tetrachloro ; Aniline/hexyloxyaniline ; Aniline/diisopropyl ; Acetanilide/octyloxy ; Salicylanilide ; Diuron ; CAS 112-30-1 ; CAS 111-87-5 ; CAS 111-27-3 ; CAS 3481-20-7 ; CAS 39905-57-2 ; CAS 24544-04-5 ; CAS 62-53-3 ; CAS 87-17-2 ; CAS 33-05-4
Library Call Number Additional Info Location Last
NTIS  PB87-116638 Some EPA libraries have a fiche copy filed under the call number shown. 07/26/2022
Collation 31p
Generic mixed-flask culture microecosystems derived from small lake and pond planktonic communities were used to evaluate the effects of selected alcohols, aniline derivatives, and aromatic amides on ecosystem-level state variables. The biogeochemical state of the systems was characterized by pH and dissolved oxygen, which reflect energy flow and nutrient cycling processes within the systems. Using changes in these variables as indicators of effect, the relative toxicity rankings of compounds within each group were determined and compared with the toxicity rankings established by fathead minnow acute toxicity. The ecosystem-level relative toxicity of three alcohols followed the toxicity rankings based on fathead minnow 96 hr LOEL's (lowest observed effect levels). The toxicity rankings of aniline and three derivatives were similar to those of the alcohols. In both alcohols and anilines, ecosystem-level effect measures became more sensitive than fathead minnow lethality toward the least toxic member of the group. These examples can be considered representative of situations that might be encountered in an early stage of ecosystem-level testing.