The three hour tour: the Mullett Lake survey.

Abstract

In this survey of Mullett Lake, physical, chemical, and biological analysis was utilized to determine its trophic status. Measurements of physical factors involved use of the secchi disk for light intensity and water clarity. Chemical parameters were measured using the hydrolab. Plankton tows were used to collect zooplankton and phytoplankton communities. Other biological organisms and macrophytes were gathered along the littoral zone. After analysis, it was determined that Mullett Lake was oligotrophic. Phytoplankton and zooplankton were scarce, which is representative of an oligotrophic lake. The hypolimnion was not anaerobic near the very bottom, so many processes like nitrification could take place. The dissolved oxygen curve exhibited a negative heterograde within the euphotic zone, which was justified as a bloom of zooplankton. Zebra mussels were found to have a very significant impact on aquatic communities. They filter feed upon the already scarce phytoplankton which directly affect zooplankton. Nutrient trends were found and correlated to the other biological and physical factors. Throughout this paper we will use physical, chemical, and biological parameters to show that Mullett Lake is oligotrophic.