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There are more lowland oaks in Ecoregion 73b than in Ecoregions 73a and 73d. The ecoregion covers 1,418 square miles (3,670 km 2) within Arkansas, Mississippi, and Tennessee, with 78% in Mississippi, and the remainder roughly split between the remaining two states. [2] Protected areas within the region include the Tallahatchie NWR in Mississippi.
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The North American Mississippi Valley Loess Plains are a Level III ecoregion designated by the Environmental Protection Agency (EPA) in six U.S. states. The region lies primarily on the eastern border of the Mississippi Alluvial Plain , from the Ohio River in western Kentucky, through Tennessee and Mississippi, to Louisiana.
The Transition Hills have some of the higher elevations in Ecoregion 65, and contain characteristics of both the Southeastern Plains and the Interior Plateau (71) ecoregions. Many streams in this transition area have cut down into the Mississippian , Devonian , and Silurian -age rocks and can look similar to those of the Interior Plateau.
The Mississippi lowland forests are a temperate broadleaf and mixed forest ecoregion in the eastern United States, covering an area of 112,300 km 2 (43,400 sq mi). [ 2 ] Setting
In the United States, the EPA and the United States Geological Survey (USGS) are the principal federal agencies working with the CEC to define and map ecoregions. Ecoregions may be identified by similarities in geology, physiography, vegetation, climate, soils, land use, wildlife distributions, and hydrology.
Why are Jackson's roads brown? Turns out, old asphalt loses its signature black color.
The level III ecoregions in Arkansas are the South Central Plains (35), Ouachita Mountains (36), Arkansas Valley (37), Boston Mountains (38), Ozark Highlands (39), Mississippi Alluvial Plain (73), Mississippi Valley Loess Plains (74). (Compare to map of Level IV ecoregions.)