Wind Cave National Park. The population of 90 bison not only represent a vital component for the tallgrass prairie ecosystem, but also help preserve the genetic integrity in the conservation of American bison. Typically a third of the prairie grasslands is burned each year. See also List of protected grasslands of North America List of National Historic Landmarks in Kansas References External links Tallgrass Prairie National Preserve – National Park Service Tallgrass Prairie National Preserve – The Nature Conservancy Tallgrass Prairie National Preserve – National Park Trust Grasslands of the North American Great Plains National Preserves of the United States Nature reserves in Kansas Protected areas of Chase County, Kansas Prairies Recreational areas in Kansas Landforms of Kansas Protected areas established in 1996 1996 establishments in Kansas Nature Conservancy preserves National Park Service areas in Kansas Grasslands of Kansas National Historic Landmarks in Kansas National Register of Historic Places in Chase County, Kansas Historic districts in Kansas