Abstract |
Macroinvertebrate populations were sampled at fourteen Ohio River and tributary stations over a five year period, 1963-1967. Selected physical and chemical surveillance data were related to biological quality. Ohio River stations included; Pittsburgh, Pennsylvania, Toronto, Marietta and Addison, Ohio, Huntington, West Virginia, Cincinnati, Ohio, Louisville, Kentucky, Evansville, Indiana and Cairo, Illinois. Population characteristics and trends in cyclic periods of abundance of certain species at the stations were found to be of utmost importance in evaluating effects of pollution on macroinvertebrates. (Author Modified Abstracts) |