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AUTHORS: Lisa Yager, National Park Service, Missouri National Recreational River
ABSTRACT: The Missouri River has endured significant anthropogenic and subsequent ecological and physical changes over the past century. Six large main stem dams have created reservoirs and disturbed flow and sediment regimes while significant river channelization has straightened and simplified the once wide meandering channel. However, the segment of river designated as the Missouri National Recreational River (MNRR) still maintains some of its original natural character and ecological function. The Missouri National Recreational River is a nationally recognized resource that preserves and protects 126 miles of flowing water, including 98 miles of the main stem Missouri River on the border of South Dakota and Nebraska, 20 miles of the lower Niobrara River in Nebraska, and 8 miles of Verdigre Creek in Nebraska. The MNRR has a dual designation as a unit of the Wild and Scenic Rivers System and a unit of the National Park Service. Despite its relatively natural characteristics, this segment of the Missouri River is still subject to substantial anthropogenic influences and continues to evolve both physically and biologically, particularly after the Missouri River record high flows in 2011. This talk will introduce the “Ecology of the Missouri National Recreational River” symposium and provide a general ecological and physical overview of the MNRR.
