Natural Resources
Conservation Service
Ecological site F089XY015WI
Moist Clayey Uplands
Last updated: 9/27/2023
Accessed: 11/21/2024
General information
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.
MLRA notes
Major Land Resource Area (MLRA): 089X–Wisconsin Central Sands
The Wisconsin Central Sands (MLRA 89) corresponds closely to Central Sand Plains Ecological Landscape published by the Wisconsin Department of Natural Resources (WDNR, 2015). Much of the following brief overview of this MLRA is borrowed from that publication.
The Wisconsin Central Sands MLRA is entirely in Wisconsin. The total land area is 2,187,100 acres (3,420 square miles, 8858 square kilometers). It is bordered to the east by Johnstown-Hancock end moraines, which were pushed to their extent by the west side of the Green Bay Lobe (Clayton & Attig, 1999). It is bordered to the southwest by highly eroded, unglaciated valleys and ridges. The dominant feature of this MLRA is the remarkably flat, sandy plain, composed of lacustrine deposits and outwash sand, that was once the main basin of Glacial Lake Wisconsin. It also features extensive pine and oak barrens and wetland complexes.
Glacial Lake Wisconsin was fed primarily by glacial meltwater from the north and east. The lake deposited silt overlain by tens of meters of sand (Clayton & Attig, 1989). The silty layers are closer to the surface in some areas, where they impede drainage and contribute to the formation of extensive wetland complexes. It is believed that Glacial Lake Wisconsin drained within several days after a breach in the ice dam that supported it. The catastrophic flood that followed flowed to the south and carved the scattered buttes and mesas protruding from the sandy plain in the southern portion of this MLRA. Before vegetation established after glacial recession, strong winds formed aeolian sand dunes that now support xeric pine and oak stands within the Wisconsin Central Sands.
The surface of the northwestern portion is mostly undulating. The sandy surface sediment was mostly deposited by meltwater during the Wisconsin glaciation. Gentle hills are a result of underlying bedrock topography. Valleys and floodplains are formed by stream action. The underlying bedrock controls the water table elevation and contributes to the formation of numerous wetlands.
Historically, the Wisconsin Central Sands were dominated by large wetland complexes, sand prairies, and oak forests, savannas, and barrens. Some pine and hemlock forests were found in the northwest portion. The Wisconsin Central Sands was subject to frequent fires, leading to today’s need for prescribed burns to maintain the area.
Classification relationships
Major Land Resource Area (MLRA): Wisconsin Central Sands (89)
USFS Subregions: Central Wisconsin Sand Plain (222Ra)
Relationship to Established Framework and Classification Systems:
Habitat Types of S. Wisconsin (Kotar, 1996): The sites of this ES keyed out to two habitat types: Pinus/Vaccinium-Gaultheria (PVG); Acer rubrum/Desmodium (ArDe)
Biophysical Settings (Landfire, 2014): This ES is largely mapped as Eastern Cool Temperate Row Crop, Eastern Cool Temperate Developed Ruderal Grassland, and Eastern Cool Temperate Close Grown Crop.
WDNR Natural Communities (WDNR, 2015): This ES is most similar to the Central Sands Pine-Oak Forest, Hardwood Forest, and Northern Mesic Forest communities.
Ecological site concept
The Moist Clayey Uplands ecological site is an uncommon site but exists in the southern portion of MLRA 89 in depressions and drainageways on the glacial lake basin and lake terraces, often (but not exclusively) within five miles of the Lemonweir River. These sites are characterized by very deep, somewhat poorly drained soils formed in silty or sandy alluvium over clayey lacustrine deposits. Precipitation, runoff from adjacent uplands, and groundwater discharge are the primary sources of water. Soils can range from neutral to moderately alkaline.
Although these soils are classified as Somewhat Poorly Drained the vegetation does not reflect this condition. It appears that poorly drained condition occurs more as micro-sites rather than the general character of the site. The dominant tree species on four representative sites were red oak (Quercus rubra), red maple (Acer rubrum) and white pine (Pinus strobus). Other species were white oak (Q. alba), northern pin oak (Q elipsoidalis) and trembling aspen (Populus tremuloides). Common understory flora included sedges (Carex spp.), blueberries (Vaccinium spp.), starflower (Trientalis boreralis), wild lily of-the-valley (Maianthemum canadense). Wetter micro sites were characterized by some of the following: Winterberry (Ilex verticillata), tag alder (Alnus crispa), swamp dewberry (Rubus hispidus) or cinnamon fern (Osmunda cinnamomea).
Moist Clayey Uplands differs from other sites by its drainage and clayey textures. Other poorly drained sites are sandy or loamy. Clayey soils often have higher pH and available water capacity than sandy and loamy textures. The somewhat poor drainage differentiates this site from other clayey sites.
Associated sites
F089XY009WI |
Wet Clayey Lowlands Wet Clayey Lowlands form in deep clayey lacustrine deposits overlain by a silty mantle. These soils are poorly drained, remain saturated for much of the growing season, and are sometimes subject to ponding. These sites are found in the southwestern portion of the Wisconsin Central Sands MLRA. They occur lower on the drainage sequence and are wetter than Moist Clayey Uplands. |
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Similar sites
F089XY009WI |
Wet Clayey Lowlands Wet Clayey Lowlands form in deep clayey lacustrine deposits overlain by a silty mantle. These soils are poorly drained, remain saturated for much of the growing season, and are sometimes subject to ponding. These sites are found in the southwestern portion of the Wisconsin Central Sands MLRA. Their vegetative communities may sometimes look similar to those of Moist Clayey Uplands, though Wet Clayey Lowlands support additional communities with a higher tolerance for wetness. |
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F089XY011WI |
Moist Sandy Outwash Uplands Moist Sandy Outwash Uplands consist of deep sandy deposits derived from a mixture of outwash, alluvium, and lacustrine sources. They are somewhat poorly drained and are subject to neither flooding nor ponding. Perhaps due to the sandy mantle that occasionally covers the clayey lacustrine deposits in Moist Clayey Uplands, their vegetative communities may sometimes be similar to those supported by sandier soils with similar drainage capabilities. |
F089XY008WI |
Wet Loamy Lowlands Wet Loamy Lowlands form in a loamy or silty mantle 10 to 40 inches (25 to 100 cm) thick overlying sandy residuum weathered from sandstone and shale. Bedrock contact may occur as high at 26 inches (66 cm). These soils are poorly drained, remain saturated for much the growing season, and are sometimes subject to ponding. They are exclusive to the northern third of the Wisconsin Central Sands MLRA, which was covered in loamy glacial deposits prior to the most recent glacial advance. Their vegetative communities may sometimes look similar to those of Moist Clayey Uplands, though Wet Loamy Lowlands are able to support additional communities with a higher tolerance for wetness. |
Table 1. Dominant plant species
Tree |
(1) Pinus strobus |
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Shrub |
(1) Corylus |
Herbaceous |
(1) Pteridium aquilinum |
Click on box and path labels to scroll to the respective text.
Ecosystem states
T1A | - | Clear cut; fire |
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R2A | - | Disturbance-free period 70+ years. |
T2A | - | Livestock grazing |
T2B | - | Cleating; agricultural production |
R3A | - | Restoration to forested site |
T3A | - | Removal of forest vegetation and tilling. |
R4A | - | Cessation of agricultural practices, natural or artificial afforestation. |
State 1 submodel, plant communities
1.1A | - | Light to moderate intensity fires, blow-downs, ice storms. |
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1.2A | - | Disturbance-free period 30+ years |
State 2 submodel, plant communities
2.1A | - | Immigration and establishment of white pine and red maple. |
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2.2A | - | Immigration and establishment of white pine and red maple. |
2.3A | - | Immigration and establishment of white pine and red maple. |