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Subdividing the Eastern Temperate Forests, Arkansas is split among three Level II ecoregions: the Southeastern Plains, Ozark, Ouachita, Appalachian Forests, and the Mississippi Alluvial and Southeast USA Coastal Plains. Level III subdivides the continent into 182 ecoregions; of these, seven lay partly within Arkansas's borders.
The Natural Resources Conservation Service has noted that amounts of rainfall in Arkansas are characterized by marked differences along a northeast/southwest dividing line. The northeast is characterized as arid-semiarid climate, and the southwest as a Gulf -influenced humid-subhumid climate. [ 31 ]
The Springfield Plateau is the only Ozark Highland Level IV ecoregion within all four states. [1] The nearly level to rolling Springfield Plateau is underlain by cherty limestone of the Mississippian Boone Formation and Burlington Limestone; it is less rugged and wooded than Ecoregions 38, 39b, and 39c, and lacks the Ordovician dolomite and limestone of Ecoregions 39c and 39d.
The flats, swales, and natural levees of the Arkansas/Ouachita River Backswamps ecoregion include the slackwater areas along the Arkansas and Ouachita rivers, where water often collects into swamps, oxbow lakes, ponds, and sloughs. In contrast to the Northern Backswamps (73d), this region is widely veneered with natural levee deposits.
In the North American Deserts there are emerging natural resources within the ecosystem. A few natural resources within the desert consist of oil, sunlight, copper, zinc, and water. [22] Some of these resources are renewable and some are non-renewable. Most of these resources are being exploited by humans and most actions are not sustainable.
The Forrest L. Wood Crowley’s Ridge Nature Center in Jonesboro, Arkansas features self-guided exhibits about area's topography and natural history and wildlife of Crowley’s Ridge. [9] Operated by the Arkansas Fish and Game Commission (AGFC) and opened in 2004, the Center includes an exhibit area, discovery room, observation tower, meeting ...
Oak-hickory woodland is the most common natural community in the Interior Low Plateaus. It is the dominant natural community for many areas of rolling hills, including the Western Highland Rim, Shawnee Hills, and Outer Bluegrass. These woodlands represent an intermediate state between a forest and a savanna. [citation needed]
The Ouachita National Forest is the oldest National Forest in the southern United States. The forest encompasses 1,784,457 acres (7,221 km 2), including most of the scenic Ouachita Mountain Range.