Lakes West and East Okoboji, Dickinson County, Iowa, were the site of a 1970 summer investigation on the density and diversity within the macroscopic bottom organisms, physical and chemical measurements of the water and substratum chemistry study. These data on Lake West Okoboji were compared with a 1918 and 1950 study of the macroscopic bottom fauna, water analyses dating from 1934, and oxygen and temperature data from as far back as 1915. The sparse species composition of the bottom fauna has remained unchanged; however, pollution indicator tubificid worms have increased in density. Water analysis, oxygen, and temperature data are little changed from earlier studies. Few data have been collected in previous years on Lake East Okoboji. Apparent cultural eutrophication has occurred in the last 60 years, causing extreme nuisance blooms of blue-green algae.
Proceedings of the Iowa Academy of Science
© Copyright 1972 by the Iowa Academy of Science, Inc.
Gale, David D.; Drevs, Everette E.; and Gross, Michael P.
"The Current Status of the Limnology and Bottom Fauna of Lakes West and East Okoboji,"
Proceedings of the Iowa Academy of Science: Vol. 79:
, Article 8.
Available at: http://scholarworks.uni.edu/pias/vol79/iss1/8