Zooplankton samples were collected quarterly from five stations representing the discharge bay and four "control" or "dispersing impact" stations. Rotifers dominated all samples numerically and by the number of taxa. All major groups (Rotifera, Cladocera, Copepoda, and Protozoa) exhibited greatest abundances during the summer. Quarterly variations in abundance and number of taxa were documented. Except for an increase in taxonomic analysis detail between 1981 and 1984 resulting in several more taxa added to the list, no long-term increases, declines or repeating cycles were apparent. Margalef's Richness Index reflected this change and showed a long-term increase with evidence of a 5- to 6-year repeating cycle. Shannon's Heterogeneity and Pielou's Evenness Indices showed no obvious trend or cycle. When these variables at Sta. 5 (discharge) were compared with other stations, no significant differences (a= 0.05) were documented..
Rickett, John D. and Watson, Robert L.
"Zooplankton Community Abundance and Diversity in Dardanelle Reservoir, Arkansas, 1981-1990,"
Journal of the Arkansas Academy of Science: Vol. 46
, Article 7.
Available at: https://scholarworks.uark.edu/jaas/vol46/iss1/7