Nebraska Academy of Sciences


Date of this Version



Published in Transactions of the Nebraska Academy of Science, Volume 4 (1977).


Copyright 1977 by the Authors; used by permission of the NAS


A novel technique for reducing growth of aquatic macrophytes and decreasing primary productivity in an eutrophic farm pond was evaluated by the addition of commercial blue and brown aniline dyes to pond water isolated from the surrounding pond in experimental boxes. Blue-dyed water completely eliminated all aquatic macrophytes, while brown-dyed water eliminated only Potamogeton sp. Primary productivity was reduced, and phytoplankton populations similar to those observed in spring and fall pulses in lakes were present in the dyed water during the summer. Intense thermal stratification, anaerobiosis, and chemical changes were recorded in the enclosed waters after dye addition.