Document Type

Technical Report

Publication Date



Phytoplankton, Reservoirs, Man-made Lakes, Arkansas, Algae, Chlorophyll, Effluents, Eutrophication, Ammonia, Nitrate, Phosphate


Selected chemical, physical and biological parameters were determined for a man-made lake, Beaver Lake, on the White River of Arkansas and Missouri. The research program determined the qualitative and quantitative aspects of the temporal and spatial distribution of the algal subcommunities. It was determined that the epipelic, epilithic, epizooic and metaphytic subcommunities had little influence on the euplanktonic subcommunity. The relationship between the qualitative and quantitative analysis of the biochromes chlorophyll-a, -b, and -c and the phytoplankton species clustered into biochrome sets is discussed. The temporal and spatial distributional patterns of temperature, oxygen, ammonia-N, nitrate-N, orthophosphate-P and silicates are described in parallel with the biological parameters. These data are related to land use practices on the two major feeder streams. One source is influenced by agricultural runoff and the other by suburbinization plus a sewage outfall from a small city. The effect of the transition from riverine to lentic conditions are also considered. Phase I portion of the Beaver Lake study included the selection of sampling sited, review of research protocol, the contribution of various algal subcommunities and analytical data of selected collection sites from late winter (February) until mid summer (July). This report, Phase II, concludes the complete annual collection of phytoplankton and associated physical and chemical parameters from all sites with an analysis of the interaction between physiochemical parameters and the succession of phytoplankton. The final phase (III) will emphasize the analysis of data for specific interactions and the development of K values for biochrome to phytoplankton assemblage density.

Report Number