Seasonal variations of phytoplankton assemblages have been observed in a mildly eutrophic lake in northwestern Arkansas for six years. The data indicated that certain metal concentrations also varied seasonally. Sodium, potassium, calcium and magnesium ion concentrations, and phytoplankton composition and abundances were examined spatially and temporally. Four major algal blooms characterized the lake: a spring, a summer and an autumnal cyanophycean assemblage and a winter diatom-chrysophyte dominated population. Each metal concentration was inversely proportional to the abundance of the cyanophytes. The presence of the winter assemblage was accompanied by decreases in sodium, calcium and magnesium and increased levels of potassium. First and second order linear regression models were developed for each assemblage.
Rice, Ramona G. and Meyer, Richard L.
"Algal Assemblage Distribution as Related to Seasonal Fluctuations of Selected Metal Concentrations,"
Journal of the Arkansas Academy of Science: Vol. 31
, Article 29.
Available at: http://scholarworks.uark.edu/jaas/vol31/iss1/29