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.
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 74d, Baton Rouge Terrace. 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. The Baton Rouge Terrace ecoregion occurs on the Pleistocene Prairie Terraces and is lower in elevation and has flatter topography than Ecoregion 74c to the north.
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
Nearly Level to depresional terrace uplands above the stream terraces and higher elevations on the Stream Terrace. Hydrology is a driver in this site with Flooding Frequency of None to Frequent however the modal concept is occasionally flooded. Ponding frequency is None with a range to include some frequently flooded areas, the site is overall Poorly Drained. This site would be in thinner loess deposits of the MLRA.
Baton Rouge Terrace Southern Loess Stream Terrace - PROVISIONAL
Baton Rouge Terrace Southern Loess Stream Terrace is found at lower elevation from this site in the Baton Rouge Terrace and may be better drained.
Baton Rouge Terrace Southern Loess Terrace - PROVISIONAL
Baton Rouge Terrace Southern Loess Terrace is found at the next higher elevation from this site in the Baton Rouge Terrace.
Southern Rolling Plains Loess Wet Terrace - PROVISIONAL
Southern Rolling Plains Loess Wet Terrace fits a similar site position on the landscape, however is found in the Rolling Plains and Bluff Hills Portion of the MLRA to the north.
Table 1. Dominant plant species
Click on box and path labels to scroll to the respective text.