A portion of the Sheyenne Grasslands is oak savannah, an imperiled ecosystem throughout its United States range. These blowouts create a unique microcosm, with flora and fauna especially adapted to this Sheyenne Delta feature. The Sheyenne River flows through the heart of the public lands and provides the area with a diversity of wildlife habitat and recreational opportunities. The biggest threat comes in the form of overgrazing by domestic cattle. Overgrazing causes changes in species composition, stresses plant communities making them vulnerable to invasive exotic species, and inhibits regeneration of woodlands.
Many wildlife species are dependent upon taller grass to complete their life-cycle.
If overgrazing occurs, there is not enough grass left for nesting cover, concealment or food. Litter, erosion, wildlife harassment and the spread of weed species are all associated with ORV use. Much of the Sheyenne Delta is mesic, or wet, prairie. Drainage of nearby wetlands for agriculture has also had a negative impact in some areas. The Solutions A reduction of cattle numbers and prolonged rest from grazing are essential for a healthy grasslands system.