SGS-LTER long-term monitoring project: Spermophilus tridecemlineatus on small mammal trapping webs on the Central Plains Experimental Range, Nunn, Colorado, USA 1999 -2006, ARS study number 118

The Short Grass Steppe site encompasses a large portion of the Colorado Piedmont Section of the western Great Plains. The extent is defined as the boundaries of the Central Plains Experimental Range (CPER). The CPER has a single ownership and landuse (livestock grazing). The PNG is characterized by a mosaic of ownership and land use. Ownership includes federal, state or private and land use consists of livestock grazing or row-crops. There are NGO conservation groups that exert influence over the area, particularly on federal lands.

短草草原（Short Grass Steppe）研究区域涵盖了西部大平原科罗拉多山麓带的大片区域，其边界以中央平原实验牧场（Central Plains Experimental Range, CPER）的边界为准。该CPER仅拥有单一的土地权属，且土地利用方式仅为家畜放牧。而PNG区域则呈现出土地权属与土地利用类型镶嵌分布的特征：其权属涵盖联邦、州属或私人所有，土地利用方式包括家畜放牧与大田作物种植。该区域内存在非政府环保组织，对区域内尤其是联邦土地的管理施加影响。