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(Pinus strobus, Quercus rubra) / Danthonia spicata Acidic Bedrock Scrub Grassland
Translated Name: (Eastern White Pine, Northern Red Oak) / Poverty Oatgrass Acidic Bedrock Scrub Grassland
Common Name: White Pine - Red Oak Acidic Bedrock Glade
Unique Identifier: CEGL005101
Classification Approach: International Vegetation Classification (IVC)
Summary: This acidic bedrock glade and woodland occurs in the Upper Great Lakes region of the United States and Canada. These glades occupy upper portions above the granitic bedrock shorelines or on rocky openings. Shrubs and scattered trees dominate the woody canopy layers; the tree canopy may approach woodland physiognomy. Trees include Betula papyrifera, Pinus banksiana, Pinus resinosa, Pinus strobus, and Quercus rubra. The shrub layer contains Diervilla lonicera, Juniperus communis, and, less frequently, Physocarpus opulifolius. The dwarf-shrub Arctostaphylos uva-ursi may also be present. The herbaceous layer contains Agrostis hyemalis, Campanula rotundifolia, Danthonia spicata, Deschampsia cespitosa, Chamerion angustifolium, Poa compressa, Sibbaldiopsis tridentata, and Vaccinium angustifolium. Other common herbaceous species include Maianthemum canadense, Melampyrum lineare, Oryzopsis asperifolia, Pteridium aquilinum, and Trientalis borealis. Moss and lichen cover may be substantial.



Classification

Classification Confidence: Low - Poorly Documented
Classification Comments: This type bears a resemblance to the Quercus ellipsoidalis - Quercus macrocarpa - (Pinus banksiana) Rocky Woodland (CEGL005246), that also occurs on granitic shoreline outcrops in Minnesota, particularly at Voyageurs National Park. It is distinct from the basaltic/metamorphic glades, Picea glauca - Abies balsamea Basalt - Conglomerate Woodland (CEGL005214), which is more spruce-fir-dominated. Stands have also been observed on Isle Royale National Park. This type is probably found in the basalt outcrops along the St. Croix River in Wisconsin (and perhaps Minnesota), and possibly elsewhere in the Penokee Range of Wisconsin.

Vegetation Hierarchy
Class 2 - Shrub & Herb Vegetation
Subclass 2.B - Temperate & Boreal Grassland & Shrubland
Formation 2.B.2 - Temperate Grassland & Shrubland
Division 2.B.2.Nc - Eastern North American Grassland & Shrubland
Macrogroup Laurentian-Acadian Acidic Rocky Scrub & Grassland
Group Laurentian-Acadian Acidic Scrub & Grassland
Alliance Common Juniper - Mixed Scrub Acidic Bedrock

This is the revised vegetation hierarchy. For more information see Classification Sources and usnvc.org.

Similar Associations
Unique Identifier Name
CEGL002491 Pinus banksiana / Cladonia spp. Rock Outcrop Vegetation
CEGL005045 Pinus banksiana / Aronia melanocarpa / Xanthoparmelia spp. Woodland
CEGL005094 Vaccinium angustifolium - Sorbus americana / Sibbaldiopsis tridentata Dwarf-shrubland
CEGL005214 Picea glauca - Abies balsamea Basalt - Conglomerate Woodland
CEGL005246 Quercus ellipsoidalis - Quercus macrocarpa - (Pinus banksiana) Rocky Woodland
CEGL006134 Quercus rubra - (Quercus montana) / Vaccinium spp. / Deschampsia flexuosa Woodland



Related Concepts from Other Classifications

Related Subnational Community Units
These data are subject to substantial ongoing revision and may be out of date for some states.
In the U.S., contact the state Heritage Program for the most complete and up-to-date information at: http://www.natureserve.org/natureserve-network.
Information from programs in other jurisdictions will be posted when they are made available.
Subnation Concept Name Relationship to Standard Confidence Reference
Michigan Granite Bedrock Glade Broader   Kost et al. 2007
Wisconsin Bedrock glade Broader   WNHI 2011


Other Related Concepts
Related Concept Name: (Pinus strobus, Quercus rubra) / Danthonia spicata Acid Bedrock Wooded Herbaceous Vegetation
Relationship: = - Equivalent
Reference: Faber-Langendoen, D., editor. 2001. Plant communities of the Midwest: Classification in an ecological context. Association for Biodiversity Information, Arlington, VA. 61 pp. plus appendix (705 pp.).

Ecological Systems Placement

Ecological Systems Placement
Ecological System Unique ID Ecological System Name
CES201.019 Laurentian Acidic Rocky Outcrop
CES201.563 Laurentian-Acadian Pine-Hemlock-Hardwood Forest


NatureServe Conservation Status
Global Status: G3G4 (28Jul2011)
Rounded Global Status: G3 - Vulnerable
Reasons: This type has a moderately wide range, occurring across the northern hardwoods region of the midwestern United States. It occupies fairly limited acreage, occurring where severe conditions on bedrock outcrops prevent trees from establishing. Apart from impacts from logging adjacent areas, the extent of this type has probably not decreased substantially. Little occurrence data are available from the Midwestern states, and condition and protection status are not known. The type is expected to be fairly resilient to impacts from natural or anthropogenic disturbances.

Distribution
Color legend for Distribution Map
United States Distribution: MI, WI
Canadian Province Distribution: ONpotentially occurs, QCpotentially occurs
Global Distribution: Canada, United States
Global Range: This acidic bedrock glade type occurs in the Upper Great Lakes region of the United States and Canada. The type ranges from northwestern Wisconsin and northern Ontario east through several Great Lakes states.

U.S. Forest Service Ecoregions
Domain Name: Humid Temperate Domain
Division Name: Warm Continental Division
Province Name: Laurentian Mixed Forest Province
Province Code: 212 Occurrence Status: Confident or certain
Section Name: Northern Great Lakes Section
Section Code: 212H Occurrence Status: Predicted or probable
Section Name: Lake Superior Section
Section Code: 212I Occurrence Status: Confident or certain
Section Name: Southern Superior Uplands Section
Section Code: 212J Occurrence Status: Confident or certain
Section Name: Western Superior Uplands Section
Section Code: 212K Occurrence Status: Possible


Vegetation

Vegetation Summary: Trees include Betula papyrifera, Pinus resinosa, Pinus strobus, and Quercus rubra; Pinus banksiana is also common. The shrub layer contains Diervilla lonicera, Juniperus communis, and, less frequently, Physocarpus opulifolius. The dwarf-shrub Arctostaphylos uva-ursi may also be present. The herbaceous layer contains Agrostis hyemalis, Campanula rotundifolia, Danthonia spicata, Deschampsia cespitosa, Chamerion angustifolium (= Epilobium angustifolium), Poa compressa, Sibbaldiopsis tridentata (= Potentilla tridentata), and Vaccinium angustifolium. Moss and lichen cover may be substantial. A plant of special interest in Michigan is Trisetum spicatum (Albert et al. 1995). Common herbaceous species include Maianthemum canadense, Melampyrum lineare, Oryzopsis asperifolia, Pteridium aquilinum, and Trientalis borealis.

Vegetation Composition (incomplete)
Species Name Rounded Global Status Growth Form Stratum Charact-
eristic
Dominant Constant
Cover Class %
Con-
stancy
%
Quercus rubra G3 Broad-leaved deciduous tree Tree canopy  
 
 
Pinus strobus G3 Needle-leaved tree Tree canopy  
 
 
Danthonia spicata G3 Graminoid Herb (field)  
 
 
Poa compressa G3 Graminoid Herb (field)      
 
 
Trisetum spicatum G3 Graminoid Herb (field)      
 
 

Vegetation Structure Summary: Shrubs and scattered trees dominate the woody canopy layers.


Environmental Setting

Wetland Indicator: N
Environmental Summary: In the Great Lakes, these glades occur on rocky outcrops and along upper areas above the granitic bedrock shorelines (Albert et al. 1995).


Dynamic Processes


Plot Sampling & Classification Analysis

Plots stored in VegBank


Authors/Contributors
Concept Author(s): D. Faber-Langendoen (2001)
Element Description Edition Date: 26Jul2011
Element Description Author(s): D. Faber-Langendoen and S.C. Gawler
NatureServe Conservation Status Factors Edition Date: 28Jul2011
NatureServe Conservation Status Factors Author(s): D. Faber-Langendoen

Ecological data developed by NatureServe and its network of natural heritage programs (see Local Programs) and other contributors and cooperators (see Sources).


References
  • Albert, D. A., P. J. Comer, R. A. Corner, D. Cuthrell, M. Penskar, and M. Rabe. 1995. Bedrock shoreline survey of the Niagaran Escarpment in Michigan's Upper Peninsula: Mackinac County to Delta County. Michigan Natural Features Inventory for Land and Water Management Division (grant # CD-0.02).

  • CDPNQ [Centre de données sur le patrimoine naturel du Québec]. No date. Unpublished data. Centre de données sur le patrimoine naturel du Québec, Québec.

  • Faber-Langendoen, D., editor. 2001. Plant communities of the Midwest: Classification in an ecological context. Association for Biodiversity Information, Arlington, VA. 61 pp. plus appendix (705 pp.).

  • Kost, M. A., D. A. Albert, J. G. Cohen, B. S. Slaughter, R. K. Schillo, C. R. Weber, and K. A. Chapman. 2007. Natural communities of Michigan: Classification and description. Report No. 2007-21, Michigan Natural Features Inventory, Lansing. 314 pp. [http://web4.msue.msu.edu/mnfi/reports/2007-21_Natural_Communites_of_Michigan_Classification_and_Description.pdf]

  • Midwestern Ecology Working Group of NatureServe. No date. International Ecological Classification Standard: International Vegetation Classification. Terrestrial Vegetation. NatureServe, Minneapolis, MN.

  • TNC [The Nature Conservancy]. 1999b. USGS-NPS Vegetation Mapping Program: Classification of the vegetation of Isle Royale National Park. The Nature Conservancy, Midwest Regional Office, Minneapolis, MN, and International Headquarters, Arlington, VA. 143 pp.

  • WDNR [Wisconsin Department of Natural Resources]. 2015. The ecological landscapes of Wisconsin: An assessment of ecological resources and a guide to planning sustainable management. PUB-SS-1131 2015. Wisconsin Department of Natural Resources, Madison. [http://dnr.wi.gov/topic/landscapes/Book.html]


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