Management Plans & Reports
Gleason Lake Management Plans
Gleason Lake Subwatershed Plan [April 2007, 6MB]
Gleason Lake Management Plan [August 2003, 5MB]
Protecting Our Lake Guide
Protecting Our Lake Guide [3MB]
Fish Survey Report, 2011
Fish Survey of Gleason Lake in 2011 [1.5MB]
Aquatic Plant Surveys
2011
Aquatic Plant Surveys for Gleason Lake, 2011 [2MB]
2010
Aquatic Plant Surveys for Gleason Lake, 2010 [3MB]
2010 Aquatic Vegetation Documentation Report
Curly Leaf Pondweed
Evaluation of Lake-Wide, Early-Season Herbicide Treatments for Controlling Invasive Curlyleaf Pondweed (Potamogeton Crispus) in Minnesota Lakes
James A. Johnson, Water Resources Science MS Defense, Limnology and Oceanography Track
ADVISOR: Ray Newman, Fisheries, Wildlife and Conservation Biology
Curlyleaf pondweed (Potamogeton crispus L.) is an invasive aquatic plant that occurs in over 800 Minnesota lakes. Its early season growth, propensity to form dense surface mats, and ability to out-compete many native aquatic plants allow it to degrade the ecological and recreational quality of infested lakes. Consequently, there is great interest in adopting management strategies that can reduce the negative impacts of curlyleaf and provide some degree of long-term control on a lake-wide basis.
I collaborated with the Minnesota Department of Natural Resources in 2006, 2007, and 2008 to evaluate lake-wide, early-season herbicide treatments for curlyleaf management. Six curlyleaf-infested lakes were treated with early-season, low-dose applications of endothall or fluridone herbicides for at least three consecutive years. Three additional lakes with established curlyleaf infestations were selected to serve as untreated reference lakes.
For all study lakes, I annually assessed the frequency and biomass of curlyleaf in May and June, documented the production of new curlyleaf turions (reproductive buds) on standing plants, and tracked changes in the abundance and viability of turions in lake sediments. Curlyleaf frequency, biomass, turion production, and sediment turion abundance were reduced after treatment and were all significantly lower in treated lakes than in untreated reference lakes. However, viable turions remained in lake sediments after three consecutive years of treatment. These results suggest that serial lake-wide, early-season herbicide treatments can effectively decrease the negative impacts of curlyleaf and reduce the abundance of turions in lake sediments, but ongoing management will likely be required to maintain long-term control of curlyleaf in infested lakes.
Zebra Mussels Prevention
Watch this Zebra Mussels Prevention video on YouTube.
Aquathol K
Aquathol K is a 40.3% Endothall liquid concentrate soluble in water used to treat a broad range of aquatic leafy plants. Aquathol K has a wide margin of tolerance for fish and other aquatic animals.
Gleason Lake Sediment Report, 2009
Curlyleaf Pondweed and Eurasian Watermilfoil Growth Potential Based on Gleason Lake Sediment Characteristics [February 2009, 1MB]
Eurasian Watermilfoil
2009
Download the 2009 Eurasian Watermilfoil Map [2009, 1MB].
2007
Download the 2007 Eurasian Watermilfoil Map [2007, 1MB].
No Eurasian Watermilfoil was located during the 2007 surveys. The site map depicts seven previously reoccurring EWM locations. These locations have all been treated numerous times for the control of EWM. Scattered plants did occur between points # 1 to #2 and between points #3 to #4. The original sites #3 and #4 were confirmed by the MN DNR in 1998.
Film Screening: Troubled Waters: A Mississippi River Story
Courtesy of TPT, “Troubled Waters” is now immediately available for on-demand viewing online.