Record Display for the EPA National Library Catalog


Main Title Interrelation of Carbon and Phosphorus in Regulating Heterotrophic and Autotrophic Populations in Aquatic Ecosystems.
Author Ker, Pat C. ; Pari, Doris F. ; Brockwa, D. L. ;
CORP Author Federal Water Quality Administration, Athens, Ga. National Pollutants Fate Research Program.
Year Published 1970
Report Number FWQA-16050-FGS-07/70; FWQA-16050-FGS; 00475;
Stock Number PB-195 195
Additional Subjects ( Ecology ; Streams) ; ( Carbon ; Food chains) ; ( Phosphorus inorganic compounds ; Food chains) ; Stream pollution ; Water pollution ; Algae ; Fresh water biology ; Nitrogen ; Metabolism ; Water chemistry ; Water pollution ; Bacteria ; Aquatic biology ;
Library Call Number Additional Info Location Last
NTIS  PB-195 195 Some EPA libraries have a fiche copy filed under the call number shown. 07/26/2022
Collation 60p
Laboratory and field investigations were conducted on the fate and cycling of carbon and phosphorus in selected aquatic ecosystems. Inorganic carbon, as CO2, supplied by both bacterial cultures and cylinder gases, stimulated the growth of the blue-green alga Anacystis nidulans. Diel studies of a stream which received biologically-treated sewage demonstrated that the dissolved CO2 and HCO3 continually produced in the system were essentially depleted by the autotrophic organisms during daylight hours, while the concentration of phosphorus remained unchanged. Addition of organic carbon and inorganic nitrogen and phosphorus alone and in combination to the waters studied directly stimulated the oxidative metabolism of the heterotrophic population, which resulted in increased dissolved CO2 and HCO3. This increased availability of inorganic carbon, rather than the direct metabolic removal of dissolved phosphorus by the algae, appeared to be directly responsible for the growth of the algal populations in the waters studied. (Author)