Natural Resources
Conservation Service
Ecological site F093BY011MI
Dry Uplands
Last updated: 9/27/2023
Accessed: 12/03/2024
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): Two sites key out to Acer saccharum – Tsuga canadensis/ Maianthemum canadense (ATM), one site keys to Pinus strobus – Acer rubrum / Vaccinium angustifolium – Aralia nudicaulis (PArVAa), and one site keys to to Pinus strobus – Acer rubrum / Vaccinium angustifolium (PArV).
Biophysical Setting (Landfire, 2014): This ES is mapped as Laurentian-Acadian Northern Hardwoods Forest – Hemlock and Laurentian-Acadian Northern Hardwoods Forest; though, it is not well represented by these descriptions.
WDNR Natural Communities (WDNR (2015): This ES is most similar to the Northern Dry-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 Dry Uplands ecological site is an uncommon site in MLRA 93B, located on outwash plains, outwash terraces, and eskers. These sites are characterized by very deep, excessively drained soils that formed in sandy and gravelly outwash. Precipitation and runoff from adjacent uplands are the primary sources of water. Soils range from strongly acid to moderately acid.
The characteristic trait of Dry Uplands is their excessive drainage, distinguishing this site from all other sites in MLRA 93B. Vegetation must be tolerant of dry, sandy soils.
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 Dry 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 lower on the drainage sequence than Dry Uplands. |
F093BY007MI |
Sandy Uplands Sandy Uplands occur on upland sites in deep sandy outwash deposits, sometimes with a thin loamy mantle of alluvium or loess. Argillic horizons are neither present nor forming in these soils. These soils are moderately well to somewhat excessively drained. These sites may occur slightly lower on the drainage sequence than Dry Uplands. |
Similar sites
F093BY007MI |
Sandy Uplands Sandy Uplands occur on upland sites in deep sandy outwash deposits, sometimes with a thin loamy mantle of alluvium or loess. Argillic horizons are neither present nor forming in these soils. Textures and landscapes positions are similar between these two sites, but Dry Uplands are exclusively excessively drained, whereas Sandy Uplands are moderately well to somewhat excessively drained. Despite this, vegetative communities supported by these two sites are similar, hovering somewhere around dry-mesic with medium nutrient requirements. |
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Table 1. Dominant plant species
Tree |
(1) Pinus strobus |
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Shrub |
(1) Corylus cornuta |
Herbaceous |
(1) Trientalis borealis |
Click on box and path labels to scroll to the respective text.
Ecosystem states
T1A | - | Stand replacing disturbance e.g. blow-down and fire, or clear-cutting, followed by fire. Regeneration by natural seeding or planting. |
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R2A | - | Fire control, time, natural succession. |
T2A | - | Grazing by livestock; tree regeneration and ground vegetation impacted |
T2B | - | Removal of natural vegetation, plowing, fertilizing, irrigating, planting agricultural crops. |
T3B | - | Livestock removed |
T3A | - | Removal of natural vegetation, plowing, fertilizing, irrigating, planting agricultural crops. |
State 1 submodel, plant communities
1.1A | - | Light to moderate intensity fires, reducing, or eliminating fire sensitive species such as red maple, balsam fir, and white spruce |
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1.2A | - | Time, natural succession |
State 2 submodel, plant communities
Communities 1, 5 and 2 (additional pathways)
2.1A | - | White pine regeneration in mixed stand of white, red, and sometimes Jack pine. |
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2.2A | - | White pine seeding in from natural seed source, or under-planted. |
2.3A | - | White pine seeding in from natural seed source, or under-planted. |
2.4A | - | White pine seeding in from natural seed source, or under-planted. |