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The CURA publications library is currently being digitized by the University of Minnesota Digital Conservancy. When the project is complete, the entire CURA publications library will be online and fully searchable. Unfortunately, during this process we are not able to honor individual requests for publications . Additionally, we no longer have physical copies of publications to send out.

New publications are digitized daily and the publications catalog on the CURA website is not automatically updated with links to scanned copies, so please search the CURA collection at the Digital Conservancy for the publications you are looking for:

Project Update: Eutrophication in Two Urban Lakes in Virginia, Minnesota.

McManus, James and Thomas C. Johnson.

Virginia and Silver Lakes, two adjoining lakes located in the heart of the Iron Range in downtown Virginia, Minnesota, have undergone significant ecological changes during the last 100 years. Once clean enough to serve as recreational resources, these lakes are no longer considered safe for a variety of recreational activities. Like most lakes in this region of Minnesota, Virginia and Silver Lakes were once relatively pristine. Today, both appear to be undergoing a change in their trophic (nutrient) statusラa change driven by higher nutrient concentrations, which stimulate algae growth. Although eutrophication can occur naturally as lakes age, human activities can greatly accelerate the process by increasing the rate at which nutrients and organic matter enter the lake's ecosystem. These substances in turn stimulate the growth of algae, creating conditions that can interfere with the recreational use of lakes and the health and diversity of fish, plants, and wildlife. Based on preliminary studies in the mid-1990s that suggested the lakes were more nutrient-rich than would be expected based on their geographic location, the City of Virginia decided to pursue remedial action to return the lakes to their natural state. This article reports on ongoing research being conducted by scientists from the University of Minnesota at Duluth's Large Lakes Observatory that attempts to lay the groundwork for remedial action by investigating the natural processes and human impacts that influence the chemical composition of the lakes. The ultimate goal of the project is to identify the various factors that affect the nutrient status of the lakes so that effective lake management controls can be implemented.

CURA Reporter
Publication date: 
Center for Urban and Regional Affairs, University of Minnesota.
Supported by a grant from the Faculty Interactive Research Program, Center for Urban and Regional Affairs (CURA), University of Minnesota.
34 (2): 17-18.
Online availability
Download from CURA: 
CURA call number: 
Reporter 34 (2)

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