Record Display for the EPA National Library Catalog


Main Title Multiple Equilibria in Modeling Open-Lake Algal Dynamics.
Author Sharma, P. ; Dettmann., E. H. ;
CORP Author Butler Univ., Indianapolis, IN. Holcomb Research Inst.;Environmental Research Lab., Narragansett, RI.
Publisher c1989
Year Published 1989
Report Number EPA/600/J-89/181;
Stock Number PB90-140856
Additional Subjects Algae ; Mathematical models ; Lakes ; Limnology ; Simulation ; Biomass ; Equilibrium ; Reprints ; Aquatic ecosystems ; Applied mathematics ; Branching(Mathematics)
Library Call Number Additional Info Location Last
NTIS  PB90-140856 Some EPA libraries have a fiche copy filed under the call number shown. 07/26/2022
Collation 16p
The study examines the apparent bifurcation phenomena and associated multiple stable states among several of the variables in an aquatic ecosystem. The study and the proposed catastrophe model should be viewed as limited to shallow aquatic ecosystems with no thermal stratification. At certain nutrient loading thresholds, algal dynamics in such lakes are found to undergo major changes over short periods of time. The study focuses on a theoretical model comprising 3 nonlinear, coupled ordinary differential equations with 11 parameters. The equations for the biomass components of the system take into consideration biological interactions, but make no assumptions for the conservation of mass. Thus, the model differs from well-established lake ecosystem simulation models. (Copyright (c) 1989 Pergamon Press plc.)