Assessment of Surface Water Quality at Selected Northwestern Wisconsin Sites by Combined Biological and Chemical Techniques

摘要

Algal assays were utilized in this project for several types of studies: (1) determination of the water quality of several waterbodies in northern Wisconsin, (2) an attempt to develop an assay to indicate the presence of organic toxins, (3) seasonal variation in the ability of an inland lake to support algal growth, and (4) the comparison of a 48 hr bioassay technique with the standard 14 day test. The results of the water quality studies indicated that phosphorus was the limiting nutrient in waters from the three sample sites, and that nitrogen became limiting when phosphorus was added. Addition of the metal complexing agent--EDTA--caused changes in biomass production in two of the three sites.