Inventory & Monitoring at Arkansas Post National Memorial

Great Egret standing on a log near water
The marshes and swamps of Arkansas Post NM provide habitat for the Great Egret (Ardea alba)

NPS / Kenneth Terry

Arkansas Post National Memorial totals 758 acres and includes the Memorial Unit (389 acres) and the Osotouy Unit (361 acres). The two units are separated by the Arkansas River and land. The Memorial Unit, a peninsula into the Arkansas River, was first designated to preserve and commemorate the first European settlement in the lower Mississippi Valley. The Osotouy Unit is located along Lake Dumond and a bayou. It was added to the park to preserve the mounds and cemetery associated with pre-Columbian and early European settlement.

The park is at the northern edge of the Gulf coastal plain. Native vegetation ranges from prairie grasses and bottomland hardwood forests, to wetland marshes near the bayous and river. Plant communities include bottomland and upland forests, swamps, fresh water marshes, canebrakes, isolated prairie relics, and manicured lawns. Trees cover almost 80% of the park and over 270 vascular plant species have been identified within its borders. Eastern North American forest types, such as oak, hickory, and black walnut can be found mixed with bottomland sweetgum-oak associates as the park topography changes.

Monitoring Updates

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    Monitoring Reports

    Source: Data Store Saved Search 3507 (results presented are a subset). To search for additional information, visit the Data Store.

    Inventory Reports

    Source: Data Store Collection 4260 (results presented are a subset). To search for additional information, visit the Data Store.

    Check out the links below for other interesting science information about your park:

    Air Quality in Parks
    Learn about the air quality at your park and how it has changed over time.

    NPS Geodiversity Atlas
    An interactive map to explore the full variety of natural geologic (rocks, minerals, sediments, fossils, landforms, and physical processes) and soil resources and processes that occur in your park.

    Find out what plants and animals are present in your park or other parks.

    Last updated: October 15, 2018