Phytoplankton samples were collected quarterly from 1981-1990 at five stations representing discharge water from Arkansas Nuclear One, a nuclear generating station, and four "control" or "dispersal evaluation" stations. Seventy-five taxa representing five divisions were identified and enumerated. Community structure was evaluated using abundances, number of taxa, and Margalef's Richness, Shannon's Heterogeneity and Pielou's Evenness indices. No long-term trends were identified, but the beginning of cyclic variations, with a 7-year periodicity, in abundance, number of taxa, and Shannon's and Pielou's indices were apparent. Margalef's index values were constant during most of the study period. For all samples, t-tests and Mann-Whitney U tests between station 5 (discharge) and each of four "control" stations, revealed no significant differences with any variable.
Rickett, John D. and Watson, Robert L.
"Phytoplankton Community Abundance and Diversity in Dardanelle Reservoir, Arkansas, 1981-1990,"
Journal of the Arkansas Academy of Science: Vol. 46
, Article 6.
Available at: http://scholarworks.uark.edu/jaas/vol46/iss1/6