Natural Resources
Conservation Service
Ecological site F093BY006MI
Alfic Sandy Uplands
Last updated: 9/27/2023
Accessed: 12/21/2024
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): 093B–Superior Stony and Rocky Loamy Plains and Hills
The Wisconsin portion of this MLRA is a mixture of high-relief moraines and flat till plains with interspersed glacial meltwater deposits. It is bordered on the north by glaciolacustrine deposits of Glacial Lake Duluth and on the south by extensive pitted and unpitted outwash plains. The approximate land area is just under 600,000 acres (935 sq miles).
The Penokee-Gogebic Iron Range runs through the middle of the Wisconsin portion of this MLRA and into Michigian. The range is a hilly, bedrock-controlled moraine. The bedrock outcropping is composed of igneous and metamorphic materials and was created by inland folding and faulting of the ancient Superior continent when it collided with the Marshfield continent about 1.8 billion years ago (Dott & Attig, 2004). Volcanic and intrusive bedrock occurs in some places. This bedrock is overlain by a thin layer of glacial till deposited by the Chippewa Lobe.
To the north of the range is a former spillway for Glacial Lake Ontonagon. The flowing meltwater cut deep channels into the morainal systems. Glaciofluvial landforms here include old beaches and dunes. South of the range, along the southern edge of this MLRA, are rolling collapsed end moraines, pushed to their extent by the Chippewa and Ontonagon Lobes. The landscape is dotted with abundant kettle lakes and swamps, especially in the eastern portion. Ice-walled lake plains and eskers are also found along these collapsed moraines.
The climate is influenced by Lake Superior in areas near the lake, resulting in cooler summers, warmer winters, and greater precipitation – especially snowfall – compared to more inland locations. Historically, mixtures of eastern hemlock (Tsuga canadensis), sugar maple (Acer saccharum), yellow birch (Betula alleghaniensis), eastern white pine (Pinus strobus), and red pine (Pinus resinosa) covered the area. In wetter pockets (such as the swamps that dot the moraines to the south) white cedar (Thuja occidentalis), black spruce (Picea mariana), and tamarack (Larix laricina) were common (Finley, R., 1976).
Classification relationships
Relationship to Established Frameworks and Classification Systems:
Habitat Types of N. Wisconsin (Kotar, 2002): Four of the five sites in teis ES key to the Acer saccharum – Tsuga canadensis/ Maianthemum canadense (ATM) habitat type, and one outlier site keys to Pinus strobus – Acer rubrum / Vaccinium angustifolium – Aralia nudicaulis (PArVAa).
Biophysical Setting (Landfire, 2014): This ES is mapped as Boreal White Spruce-Fir-Hardwood Forest – Inland, Laurentian-Acadian Pine-Hemlock-Hardwood Forest, and Laurentian-Acadian Northern Hardwoods Forest – Hemlock; though, it is likely best represented by the latter.
WDNR Natural Communities (WDNR (2015): This ES is most similar to the Northern Mesic Forest.
Hierarchical Framework Relationships:
Major Land Resource Area (MLRA): Superior Stoney and Rocky Loamy Plains and Hills, Eastern Part (93B)
USFS Subregions: Winegar Moraines (212Jc)
Small sections occur in the Gogebic-Penokee Iron Range (212Jb) subregion
Wisconsin DNR Ecological Landscapes: North Central Forest
Ecological site concept
The Alfic Sandy Uplands ecological site is an uncommon site in MLRA 93B, located on moraines, lake plains, and outwash plains. These sites are characterized by very deep, well to somewhat excessively drained soils that formed in sandy till and sandy outwash. These soils have a layer of significant clay accumulation (i.e. an argillic horizon, sometimes composed of lamellae) that helps perch and retain water in the soil profile. Precipitation and runoff from adjacent uplands are the primary sources of water. Soils range from very strongly acid to slightly acid.
The characteristic clay accumulation found in Alfic Sandy Uplands differentiates it from Sandy Uplands. This boost in available water capacity provided by the clay layer allows Alfic Sandy Uplands to support a wide range of vegetative species. Other upland sites have loamy materials. Sandy materials often have a lower pH and available water capacity than loamy materials, which may limit vegetative growth.
Associated sites
F093BY004MI |
Wet Lowlands Wet Lowlands occur on depressions and drainageways and form in loamy till or loamy alluvium underlain by dense sandy till or sandy and gravelly outwash. These sites are poorly drained and occur lower on the drainage sequence than Alfic Sandy Uplands. |
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F093BY005MI |
Moist Lowlands Moist Lowlands occur on footslope positions across the landscape. They are not subject to flooding nor ponding. Soils form in till, lacustrine deposits, or outwash deposits and may be loamy to sandy. These sites are somewhat poorly drained and occur slightly lower on the drainage sequence than Alfic Sandy Uplands. |
F093BY011MI |
Dry Uplands Dry Uplands are found in the sandiest, most permeable soils on the driest landscape positions. They are very deep and excessively drained. These sites occur slightly higher on the drainage sequence than Alfic Sandy Uplands. |
Similar sites
F093BY009MI |
Alfic Loamy Uplands Alfic Loamy Uplands occur on upland sites in loamy glaciofluvial deposits. They are moderately well to well drained. They occur on similar landscape positions and drainage sequence positions as Alfic Sandy Uplands. In both sites, an argillic horizon is either present or forming. Alfic Loamy Uplands have finer textures. |
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F093BY007MI |
Sandy Uplands Like Alfic Sandy Uplands, Sandy Uplands occur on upland sites in deep sandy outwash deposits, sometimes with a thin loamy mantle of alluvium or loess. Unlike Alfic Sandy Uplands, argillic horizons are neither present nor forming in these soils. These soils are moderately well to somewhat excessively drained. |
F093BY011MI |
Dry Uplands Dry Uplands are found in the sandiest, most permeable soils on the driest landscape positions. They are very deep and excessively drained. These soils lack a horizon of significant clay accumulation. The amount of water stored by these soils is lower than that of Alfic Sandy Uplands. The vegetative community reflects these differences with slightly drier and less nutrient-demanding species present. |
Table 1. Dominant plant species
Tree |
(1) Acer saccharum |
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Shrub |
(1) Acer saccharum |
Herbaceous |
(1) Dryopteris carthusiana |
Click on box and path labels to scroll to the respective text.
T1A | - | Major stand replacing disturbance |
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T1B | - | Clearing of site; agricultural production |
R2A | - | Time and natural succession |
T2A | - | Clearing; agricultural production |
State 1 submodel, plant communities
1.1.A | - | Natural mortality in the oldest age classes, sporadic small-scale blow-downs and ice storms, create openings for entry of mid-tolerant species, such as red oak and red maple |
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1.2.A | - | Time and natural succession |
State 2 submodel, plant communities
2.1.A | - | Red oak and red maple regenerating under aspen -paper birch canopy |
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2.2.A | - | Time and natural succession |