Natural Resources
Conservation Service
Ecological site F089XY018WI
Siliceous Sand 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) and Neillsville Sandstone Plateau (222Rb)
Small sections occur in the Lincoln Formation Till Plain - Mixed Hardwoods (212Qb) Subregions
Relationship to Established Framework and Classification Systems:
Habitat Types of S. Wisconsin (Kotar, 1996): The sites of this ES keyed out to four habitat types: Pinus/Vaccinium-Gaultheria (PVG); Pinus/Vaccinium-Cornus (PVCr); Pinus/Euphorbia (PEu); Acer-Quercus/Viburnum, Geranium variant (AQVb-Gr)
Biophysical Settings (Landfire, 2014): This ES is largely mapped as Laurentian-Acadian Northern Pine Forest, Managed Tree Plantation-Northern and Central Hardwood and Conifer Plantation Group, North-Central Oak Barrens Woodland, North-Central Interior Oak Savanna, and North-Central Interior Maple-Basswood Forest.
WDNR Natural Communities (WDNR, 2015): This ES is most similar to the Northern Dry-Mesic Forest and Central Sands Pine-Oak Forest communities.
Ecological site concept
The Siliceous Sand Uplands are found on pediments, stream terraces, and lake plains in the western portion of MLRA 89, where the sandstone bedrock is relatively shallow. These sites are characterized by very deep, well drained soils formed primarily in siliceous sandy alluvium. Some sites have siliceous eolian deposits, and other sites may be underlain by sandy residuum. The sand in these soils is derived from weathered sandstone that was cemented by silica. Precipitation and runoff from adjacent uplands are the primary sources of water, but groundwater discharge may also be a significant contributor. Soils range from extremely acid to strongly acid.
Siliceous Sand Uplands differs from other sites by its drainage and siliceous sandy material. Other well drained sands formed in outwash sands or have bedrock within 40 inches (100 cm). The siliceous sands tend to be less productive than the outwash sands. Difference in vegetation has been observed. 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 differentiates this site from other sandy sites.
Associated sites
F089XY001WI |
Acidic Poor Fen Acidic Poor Fens sites consist of deep herbaceous organic materials. They are very poorly drained and remain saturated throughout the year. They are strongly to extremely acidic. These sites are wetlands. These sites are found primarily in the western half of the Wisconsin Central Sands MLRA. They occur lower on the drainage sequence and are much wetter than Siliceous Sand Uplands. |
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F089XY007WI |
Wet Siliceous Sand Lowlands Wet Siliceous Sand Lowlands 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. They are very poorly to poorly drained and remain saturated from much of the growing season. Some are subject to ponding. These sites are primarily found in the western half of the Wisconsin Central Sands MLRA. They occur lower on the drainage sequence and are wetter than Siliceous Sand Uplands. |
F089XY012WI |
Moist Siliceous Sandy Uplands Moist 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. They are somewhat poorly drained and are subject to neither flooding nor ponding. These sites are found west of the Wisconsin River. They occur lower on the drainage sequence and are wetter than Siliceous Sand 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 Siliceous Sand Uplands, amounting to very similar vegetative communities between the two sites. |
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F089XY017WI |
Sandy Outwash Uplands Sandy Outwash Uplands primarily consist of deep sandy outwash deposits. Soils are somewhat excessively to excessively drained and are primarily found east of the Yellow River. Their textures and drainage capabilities are very similar to those of Siliceous Sand Uplands, amounting to very similar vegetative communities between the two sites. |
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 cutting or stand-replacing fire |
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R2A | - | Disturbance-free period 70+ years |
T2A | - | Livestock grazing |
T2B | - | Site transitioned to cropland production |
R3A | - | Livestock removed |
T3A | - | Removal of forest vegetation and tilling. |
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. |