Record Display for the EPA National Library Catalog


OLS Field Name OLS Field Data
Main Title Biological Models of Freshwater Communities.
Author Tau, Frieda B. ;
CORP Author Washington Univ., Seattle. Coll. of Fisheries.
Year Published 1973
Report Number EPA-16050-DXM; 660/3-73-008,; 00925
Stock Number PB-225 029
Additional Subjects ( Fresh water biology ; Models) ; ( Pesticides ; Toxicity) ; Algae ; Protozoa ; Ciliata ; Water pollution ; Bacteria ; Primary biological productivity ; Luminous intensity ; Computerized simulation ; DDT ; Stress(Physiology) ; Cultures(Biology) ; Chlorine aromatic compounds ; Chemostats ; Tetrahymena vorax ; Chlamydomonas reinhardtic ; Biphenyl/chloro ; Eutrophication
Library Call Number Additional Info Location Last
NTIS  PB-225 029 Most EPA libraries have a fiche copy filed under the call number shown. Check with individual libraries about paper copy. 06/23/1988
Collation 80p
Data from continuous cultures of an alga (Chlamydomonas reinhardtii) and protozoan (Tetrahymena vorax) have been used to construct a model of algal standing crop over ranges of light intensity, dilution rate, and nutrient concentration both in the absence and presence of predation by the protozoa. The model predicts that predation can reduce algal standing crop only within certain ranges of the environmental variables. The comparative toxicities of Aroclor 1242, a polychlorinated bipheny1, and DDT, were tested on the alga and protozoan, and also on daphnids, ostracods, and guppies. (Modified author abstract)