Natural Resources
Conservation Service
Ecological site F089XY007WI
Wet Siliceous Sand Lowlands
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) subregion
Wisconsin DNR Ecological Landscapes: Central Sand Plains
Relationship to Established Framework and Classification Systems:
Habitat Types of S. Wisconsin (Kotar, 1996) and Wetland Forest Habitat Type Classification System for Northern Wisconsin (Kotar and Burger, 2017): The sites of this ES keyed out to three habitat types: Pinus/Vaccinium-Gaultheria (PVG); Pinus/Vaccinium-Rubus hispidus (PVRh); Pinus-Acer/Gaylussacia (PArGy). The latter is a wetland habitat type for Northern Wisconsin used in lieu of Southern Wisconsin habitat types.
Biophysical Settings (Landfire, 2014): This ES is largely mapped as North-Central Interior Maple-Basswood Forest, Central Interior and Appalachian Swamp Forest, Laurentian Shrubland Barrens, and Eastern Cool Temperate Pasture and Hayland.
WDNR Natural Communities (WDNR, 2015): This ES is most similar to the Northern Wet Forest, Mesic Hardwood Forest, with canopy vegetation of some sites most similar to Northern Dry-mesic Forest communities.
Ecological site concept
The Wet Siliceous Sand Lowlands ecological site characterized by very deep, very poorly or poorly drained soils formed in siliceous sandy alluvium and siliceous sandy lacustrine deposits. The materials are comprised from sands weathered from sandstone that was cemented by silica. This site is common to the western half of MLRA 89, west of the Wisconsin River, where the sandstone bedrock is relatively shallow. These soils are subject to frequent, brief flooding events during the growing season. Precipitation and runoff from adjacent uplands are the primary sources of water, but groundwater discharge is another significant contributor. Soils range from extremely acid to moderately acid.
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 white oak (Q. alba) and red oak (Q. rubra), white pine (Pinus strobus) and red maple (Acer rubrum). Also common are mixed stands of trembling aspen (Populus tremuloides) and paper birch (Betula papyrifera). There also are considerable areas of planted red pine (P. resinosa).
Wet Siliceous Sand Lowlands are distinguished from other ecological sites based on drainage and siliceous sandy material. Other poorly 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 and the two similar parent materials may support slightly different vegetative communities. The poor drainage differentiates this site from other siliceous 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 than Wet Siliceous Sand Lowlands. |
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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 higher on the drainage sequence than Wet Siliceous Sand Lowlands. |
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. They occur much higher on the drainage sequence than Wet Siliceous Sand Lowlands. |
Similar sites
F089XY003WI |
Sandy Floodplains Sandy Floodplains sites are found exclusively on floodplains in sandy alluvium. Most sites are somewhat poorly to poorly drained and are subject to flooding. These sites occur primarily along the Wisconsin, Lemonweir, Yellow, and Black Rivers and some of their tributaries. These sites support vegetative communities similar to those found on Wet Siliceous Sand Lowlands. |
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F089XY005WI |
Wet Sandy Bedrock Lowlands Wet Sandy Bedrock Lowlands consist of sandy alluvium underlain by loamy residuum. Bedrock occurs within 40 inches (100 cm) and perches the water table. Soils are poorly drained and subject to ponding. These sites are found in the northwestern portion of the Wisconsin Central Sands MLRA where the depth to bedrock is shallow. These sites support vegetative communities similar to those found on Wet Siliceous Sand Lowlands. |
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 support vegetative communities similar to those found on Wet Siliceous Sand Lowlands. |
Table 1. Dominant plant species
Tree |
(1) Pinus strobus |
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Shrub |
(1) Acer rubrum |
Herbaceous |
(1) Vaccinium |
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. |
T2B | - | Removal of forest vegetation and tilling. |
R3A | - | Removal of livestock grazing. |
T3A | - | Removal of forest vegetation and tilling. |
R4A | - | Cessation of agriculture and 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 | - | Establishment of shade tolerant species |
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2.2A | - | Establishment of shade tolerant species |
2.3A | - | Establishment of shade tolerant species |