AWRI Environmental Chemistry

Microcystis in Lakes Erie and Huron


FAHNENSTIEL, G.L., D.F. Millie, J. DYBLE, R.W. Litaker, P.A. Tester, M.J. McCORMICK, R. Rediske, and D. Klarer. Microcystin concentrations and cell quotas in Saginaw Bay, Lake Huron. Aquatic Ecosystem Health and Management 11(2):190-195 (2008).

Millie, D.F., G.L. FAHNENSTIEL, J. DYBLE, R.J. Pigg, R.R. Rediske, D.M. Klarer, R.W. Litaker, and P. A. Tester. Influence of environmental conditions on late-summer cyanobacterial abundance in Saginaw Bay, Lake Huron. Aquatic Ecosystem Health and Management 11(2):196-205 (2008)

Millie, D. F., Fahnenstiel, G., Dyble, J., Pigg, J., Rediske, R., Klarer, D. M., Tester, P. A. Late-summer phytoplankton in western Lake Erie (Laurentian Great Lakes): bloom distributions, toxicity, and environmental influences. Aquatic Ecology (in press)

Project Description:

AWRI will be involved in a three-year study of the factors that control microcystin production by Mircrocystis in the Great Lakes, specifically Saginaw Bay and western Lake Erie. The work will be performed at NOAA's Great Lakes Environmental Research Laboratory, and Grand Valley State University's Water Resource Institute. This is a cooperative project between these two institutions. The first two years will include intensive field sampling and sample analyses, whereas the third year will be devoted to data analysis and synthesis. Fieldwork will consist of frequent sampling at single master/indicator stations and a large synoptic cruise during the period of maximum bloom formation in Saginaw Bay/western Lake Erie using ships/vessels from NOAA's Great Lakes Environmental Research Lab. Master stations in Saginaw Bay and western Lake Erie will be identical to those sampled in the previous studies; station #5 (from Nalepa and Fahnenstiel, 1995 and Vanderploeg et al. 2001) will be designated the master station within Saginaw Bay and a station located near the Toledo Harbor Light (near the area of persistent Microcystis blooms Budd et al. 2001 and similar to the sampling station used by NOAA-GLERL and University of Toledo monitoring programs) will be the master station within western Lake Erie.

Master stations in both Saginaw Bay and Lake Erie will be sampled at least bi-weekly during bloom initiation, development, and senescence periods, (a period typically lasting 2 months). At these stations, field sampling will be performed. Once a bloom is located, large in situ enclosures will be deployed to confine the existing bloom community. The mesocosms will allow frequent sampling (daily) of a specific bloom population. Samples will be analyzed for growth, Division, C:N:P, Microcystin-LR Cell Quota, community composition, community growth rates, and general limnological measurements.

Page last modified January 21, 2010