Field Notes
U.S. Fish & Wildlife Service
Field Notes Entry   
Service Assists in the Protection of Hines Emerald Dragonfly Habitat through the Removal of Invasive Species at Ridges Sanctuary in Door County, Wisconsin
Midwest Region, October 11, 2010
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Bundle and cut method. (U.S. Fish and Wildlife Service)
Bundle and cut method. (U.S. Fish and Wildlife Service) - Photo Credit: n/a
Pickerel Pond. (U.S. Fish and Wildlife Service)
Pickerel Pond. (U.S. Fish and Wildlife Service) - Photo Credit: n/a

The Ridges Sanctuary is a 1,300 acre Wisconsin State Natural Area that has been labeled as a National Natural Landmark and an important bird area by the National Audubon Society. Located within the Sanctuary is Pickerel Pond, a highly sensitive and diverse wetland ecosystem that supports many key species, such as the federally endangered Hine’s emerald dragonfly. Pickerel Pond is a 100-acres area comprised of a small open water pool surrounded by a large sedge meadow. Dominant species include Great Northern Bulrush, Blue Joint Grass and Carex stricta, with other common species being Buckbean, Labrador Marsh Bedstraw, Pitcher Plant, Grass of Parnassus, and Marsh Five-finger. Due to its remote location, this area has not been disturbed by development or agriculture runoff. Although the wetland community is mostly free of invasive plant species, there are areas that have been invaded by Phragmites and pose a serious threat of expanding throughout the site. The work accomplished for 2010 by the U.S. Fish and Wildlife Service and Ridges Sanctuary focused on this spread of Phragmites within the Pickerel Pond wetland complex and the beach of Moonlight Bay. Due to the impact that machinery or aerially broadcast herbicide would have on the existing native vegetation, manually applying herbicide to Phragmites stems has been determined to be the only acceptable method of application. Four methods of treatment were used to control phragmites on this site; Bundle and Cut Method, Foliar Spray, and Swipe Method. As a result of these labor intensive methods approximately 11 acres of wet meadow/wetland habitat were protected enhancing habitat required by the Hine’s Emerald Dragonfly. Future efforts will focus on eradicating the remaining populations of Phragmites present Pickerel Pond wetland site to continue to provide optimal habitat for the Hine’s Emerald Dragonfly and other resident wildlife.

Contact Info: John Riens, 541-885-2503, John_Riens@fws.gov
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