The Louis J. Sima Great Lakes Marsh

In 2002, the Sima Family of New Buffalo donated 156 acres to create the Louis J. Sima Great Lakes Marsh, located on the Galien River in New Buffalo. The land is environmentally significant as one of the few Great Lakes marshes remaining in southwest Michigan. Its area is vast, including river channels and narrow shrub borders. In addition, it is adjacent to the Galien River County Park Preserve, which contains upland as well as marshland. In total, the marsh and the park preserve a total of 250 acres for future generations.

The Sima Marsh is a non-forested wetland directly influenced by and connected to Lake Michigan. It provides important habitat for migrating and breeding waterfowl shorebirds, including osprey, Double-crested Cormorant, Black-crowned Night Heron, Cooper’s Hawk, Northern Harrier, Caspian Tern, Forester’s Tern, and the Black Tern, all of which are threatened or special concern species. It is also habitat to spawning fish and medium sized mammals (muskrat, fox, etc.) and a variety of reptiles and amphibious creatures including the threatened Blanding’s Turtle, Blanchard’s Cricket Frog, and the Massasauga Rattlesnake.

Although threatened, the Great Lakes marsh is considered one of the richest habitats on earth and continues to support high plant diversity, including substantial populations of the state-threatened Cup Plant and the state special concern Swamp Rose-Mallow.

One of the best ways to access the marsh is in a canoe or a kayak. Winding through the mysterious channels in a boat is a great way to spend an afternoon. Thanks to a grant from AEP, a new water trail will be constructed to enhance understanding of the marsh and its implications for the area. This water trail will make the marsh even more accessible to the public. Our partners for this project include the surrounding communities of The Preserve Association and The Riviera Homeowners Association. Currently, access docks are in New Buffalo across from the public beach and on Red Arrow Highway outside of town.

The boundaries and area surrounding the Louis J. Sima Great Lakes Marsh.

Marsh Restoration Program

The marsh is considered a high quality Great Lakes marsh. But its diversity and ecological value are being threatened by the invasion of exotic species as well as habitat loss from development and water quality issues.

COL received a grant from the Pokagon Fund to restore the marsh to its original glory and hired JFNew, a reputable ecological consulting service, to help create an invasive species management plan on the Sima Marsh. Together, we have developed a program of invasive species control and a reseeding plan. Goals of the restoration project are to increase biodiversity and populations of native species; reduce invasive species; improve habitat for four threatened or endangered species; educate the community about invasive and native plants; and enhance the ecological function of the marsh in order to improve water quality.

You can download and read a pdf file containing the full Louis J. Sima Great Lakes Marsh Management Plan.

Restoration Tasks Completed in 2008

Upon receipt of an Aquatic Nuisance Control Permit from the Michigan Department of Environmental Quality (MDEQ), JFNew began invasive species control efforts on October 2. Selective herbicide treatments were performed on populations of common reed (Phragmites australis) and Japanese knotweed (Polygonum cuspidatum) within the 4 marsh properties owned by Chikaming Open Lands, The Preserve, Riviera, and Berrien County. Common reed populations were treated with a 2% glyphosate solution using backpack, hand wiping, and mobile spray units mounted on boat and ATV. Japanese knotweed was treated by backpack sprayer with a 5% solution of triclopyr. Site photographs are attached for your review.

We anticipate that these treatments resulted in approximately 60-70% reduction of common reed populations, and 10-20% reduction of the single Japanese knotweed population; however, actual results will not be known until the emergence of vegetation in 2009.

Management tasks scheduled for 2009 include continued herbicide treatments to common reed and Japanese knotweed, introduction of purple loosestrife beetles, and site monitoring to assess ongoing restoration activities and impacts.