Natural Resources
Conservation Service
Ecological site F089XY017WI
Sandy Outwash 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 a representation of fire-dependent communities.
Classification relationships
Major Land Resource Area (MLRA): Wisconsin Central Sands (89)
USFS Subregions: Central Wisconsin Sand Plain (222Ra) and Neillsville Sandstone Plateau (222Rb)
Small sections occur in the Central Wisconsin Moraines and Outwash (222Kb) and Lincoln Formation Till Plain - Mixed Hardwoods (212Qb) Subregions
Relationship to Established Framework and Classification Systems:
Habitat Types of N. & S. Wisconsin (Kotar, 2002 & 1996): The sites of this ES keyed out to five habitat types: Pinus/Vaccinium-Gaultheria (PVG); Pinus/Vaccinium-Gaylussacia (PVGy); Pinus-Acer rubrum/Vaccinium-Hamamelis (PArVHa); Acer-Quercus/Viburnum, Geranium variant (AQVb-Gr); Acer rubrum/Desmodium (ArDe)
Biophysical Settings (Landfire, 2014): This ES is largely mapped as North-Central Interior Dry Oak Forest and Woodland, North-Central Interior Dry Oak Forest and Woodland, Laurentian-Acadian Northern Hardwoods Forest, Eastern Cool Temperate Row Crop, and Eastern Cool Temperate Close Grown Crop.
WDNR Natural Communities (WDNR, 2015): This ES is most similar to the Northern Dry-Mesic Forest, Northern Dry Forest, and Central Sands Pine-Oak Forest communities.
Ecological site concept
The Sandy Outwash Uplands heavily populate the eastern portion of MLRA 89 which is dominated by sandy outwash and lake plains. These sites are characterized by very deep, well drained soils formed primarily in sandy outwash materials. Few sites have eolian sand deposits, and others are underlain with till or alluvium. Precipitation, runoff from adjacent uplands, and groundwater discharge are the primary sources of water. Soils range from very strongly acid to neutral.
Historically, this Ecological Site was dominated by a variety of plant communities, apparently reflecting differences in historic fire regime. Prairie, Pine Barrens, Oak Barrens, Oak Savanna and mixed Pine - Oak forests were all represented. Following European settlement most of the area was cleared of forest vegetation and converted to farming, although scattered woodlots remained. Current woodlots typically consist of mixed oak, primarily northern pin oak (Quercus ellipsoidalis), black oak (Q. velutina), white oak (Q. alba), red maple (Acer rubrum) and white pine (Pinus strobus). There are also considerable areas of planted red pine (P. resinosa).
Sandy Outwash Uplands differs from other sites by its deep sandy deposits and somewhat poorly drained soils. These sites formed in deep outwash and lacustrine sands that are not siliceous, differing them from Siliceous Sand Uplands. Sites with outwash sand tend to be more productive than the siliceous sands. Difference in vegetation is observed. Depth to bedrock sets apart Dry Sandy Bedrock Uplands. The sandy texture sets this site apart from the loamy well drained sites. Sands tend to have lower pH and available water capacity than loams, which can limit vegetative growth. The well-draining soil of this site differentiates it from other sandy sites.
Associated sites
F089XY002WI |
Mucky Swamps Mucky Swamps sites consist of herbaceous organic materials sometimes underlain by sandy to loamy mineral soil. They are very poorly drained and remain saturated throughout much of the year. These sites are wetlands and they occur lower on the drainage sequence and are much wetter than Sandy Outwash Uplands. |
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F089XY006WI |
Wet Sandy Outwash Lowlands Wet Sandy Outwash Lowlands consist of deep sandy deposits derived from a mixture of outwash, alluvium, and lacustrine sources. They are very poorly to poorly drained, remain saturated for much of the growing season, and are subject to frequent ponding. These sites are primarily found in the eastern half of the Wisconsin Central Sands MLRA. They occur lower on the drainage sequence and are wetter than Sandy Outwash Uplands. |
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. They occur lower on the drainage sequence and are wetter than Sandy Outwash Uplands. |
Similar sites
F089XY016WI |
Dry Sandy Bedrock Uplands Dry Sandy Bedrock Uplands form in sandy deposits derived from a mixture of outwash, alluvium, and residuum. Contact with interbedded sandstone and shale bedrock occurs within 40 inches (100 cm) of the surface. These soils are moderately well to excessively drained. Their textures and drainage capabilities are very similar to those of Sandy Outwash Uplands, amounting to very similar vegetative communities between the two sites. |
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F089XY018WI |
Siliceous Sand Uplands Siliceous Sand Uplands consist of deep sandy deposits sourced primarily from the weathering of sandstone high in silica. The weathered sand was deposited by rivers or glacial lakes. Soils are moderately well to excessively drained. These sites are found west of the Wisconsin River. Their textures and drainage capabilities are very similar to those of Sandy Outwash Uplands, amounting to very similar vegetative communities between the two sites. |
Table 1. Dominant plant species
Tree |
(1) Pinus strobus |
---|---|
Shrub |
(1) Corylus |
Herbaceous |
(1) Pteridium aquilinum |
Click on box and path labels to scroll to the respective text.
Ecosystem states
T1A | - | Clear cutting or stand-replacing fire |
---|---|---|
R2A | - | Disturbance-free period 70+ years |
T2A | - | Forage established; grazing |
T3A | - | Site cleared; managed for agricultural crops |
R3A | - | Livestock removed |
T3A | - | Transition to crop production |
R4A | - | Site is forested through planting or natural succession |
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 | - | Increase in white pine and red maple. |
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2.2A | - | Increase in white pine and red maple. |
2.3A | - | Increase in white pine and red maple. |