Benthic and planktonic Phycomycetes from northern Michigan

TitleBenthic and planktonic Phycomycetes from northern Michigan
Publication TypeJournal Article
Year of Publication1967
AuthorsPaterson RA

During the summers of 1961 and 1962 an investigation of benthic Phycomycetes was made in Grand Traverse Bay, Lake Michigan, and in 1961, 1963, and 1965, in Douglas Lake, Michigan, by using a modified "baiting" method. In addition, a preliminary study of planktonic chytrids, including their vertical distribution, was made in Lake Michigan. On substrata which were placed in the benthic areas, the most commonly found in Douglas Lake were members of the Chytridiales occurring on chitin, whereas in Grand Traverse Bay oomycetous organisms on hemp seed were the most common. Most chytridiaceous fungi from Douglas Lake occurred between the first week or 10 days in July to the end of that month. In the preliminary study on vertical distribution, planktonic fungi inhabiting diatoms were most abundanct in number of species and thalli at 25 and 30 m on July 16 and at 30 m on July 22. The distribution of fungal populations may have been influenced by the thermal stratification of the water. Several species of parasites on algae were also found in material collected in the surface waters of Grand Traverse Bay and Sturgeon Bay, Lake Michigan by means of plankton tows. In addition, saprophytic planktonic fungi, all members of the Oomycetes, were collected by placing "baits" in the epilimnion.