Provisional. A provisional ecological site description has undergone quality control and quality assurance review. It contains a working state and transition model and enough information to identify the ecological site.
Figure 1. Mapped extent
Areas shown in blue indicate the maximum mapped extent of this ecological site. Other ecological sites likely occur within the highlighted areas. It is also possible for this ecological site to occur outside of highlighted areas if detailed soil survey has not been completed or recently updated.
Major Land Resource Area (MLRA): 134X–Southern Mississippi Valley Loess
MLRA 134, Southern Mississippi Valley Loess, is in Mississippi (39 percent), Tennessee (23 percent), Louisiana (15 percent), Arkansas (11 percent), Kentucky (9 percent), Missouri (2 percent), and Illinois (1 percent). It makes up about 26,520 square miles (68,715 square kilometers). The northern part of the area includes Paducah and Murray, Kentucky; Paragould, Jonesboro, and Forrest City, Arkansas; and Memphis, Dyersburg, Bartlett, and Germantown, Tennessee. The southern part includes Yazoo City, Clinton, and Jackson, Mississippi, and Baton Rouge, Opelousas, Lafayette, and New Iberia, Louisiana. This portion is the farthest southeast part of the MLRA in Louisiana. It is in the Mississippi Valley Loess Plains Section of the EPA Ecoregions in sub-section 74c, Southern rolling Plains. The dissected plains in this MLRA have a loess mantle that is thick at the valley wall and thins rapidly as distance from the valley wall increases. Although less dissected than the Bluff Hills (74a), the region has more irregular and dissected topography than adjacent 74b to the north in Mississippi. The historic forests contained shortleaf pine, loblolly pine, and upland oaks and hickories. Pine is naturally more prevalent here than in 74a and 74b. Land cover now is mostly mixed pine-hardwood forest, pine plantations, pasture, and cropland. The eastern boundary of this region is broad, with a gradual transition to the southern Coastal Plains.
Major Land Resource Area (MLRA) and Land Resource Unit (LRU) (USDA-Natural Resources Conservation Service, 2006)
EPA Level IV Ecoregion
The Natural Communities of Louisiana - (Louisiana Natural Heritage Program - Louisiana Department of Wildlife and Fisheries)
Ecological site concept
Deep to very Deep, Moderately Well to Excessively drained, nearly level soils on flood plains and low stream terraces; these sites are subject to rare to frequent flooding. Nearly linear surfaces of higher parts of flood plains or low stream terraces. These soils formed in silty or loamy alluvial sediment along streams that drain areas of the Southern Mississippi Valley Loess Major Land Resource Area in level IV EPA Ecoregion 74c, Southern Rolling Plains of the Southern Mississippi Valley Loess Plains.
Southern Rolling Plains Loess Drainways - PROVISIONAL
134XY101 Southern Rolling Plains Loess Drainways will be found at elevation below this site with a greater flooding frequency.
Baton Rouge Terrace Southern Loess Stream Terrace - PROVISIONAL
134XY122 Baton Rouge Terrace Southern Loess Stream Terrace fits a similar site position on the landscape, however is found in the Baton Rouge Terrace Portion of the MLRA to the south of this site.
Table 1. Dominant plant species
Click on box and path labels to scroll to the respective text.