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Classification
Scientific Name: Laurentian-Acadian Calcareous Rocky Outcrop
Unique Identifier: CES201.572

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Summary: This outcrop system occurs in scattered locations from New England west to the Great Lakes. It occurs on ridges or summits of circumneutral to calcareous bedrock. Sites are often exposed and dry; however, there may be local areas of more moist conditions. The vegetation is often a mosaic of woodlands and open glades. This system may also occur on rocks that are primarily acidic but with a local influence of calcium through weathering.

Classification Approach: International Terrestrial Ecological Systems Classification (ITESC)


Similar Ecological Systems
Unique Identifier Name
CES202.602 Central Appalachian Alkaline Glade and Woodland


Component Associations
Association Unique ID Association Name
CEGL005059 Acer saccharum - Ostrya virginiana - Carya ovata - Quercus rubra Limestone Woodland
CEGL005237 Quercus macrocarpa / Danthonia spicata - (Geum triflorum) Limestone Open Woodland
CEGL006021 Thuja occidentalis / Carex eburnea Forest
CEGL006093 Thuja occidentalis / Oligoneuron album Rocky Outcrop
CEGL006104 Adiantum aleuticum - Asplenium spp. - Cerastium arvense Sparse Vegetation
CEGL006180 Juniperus virginiana - Ostrya virginiana / Carex eburnea Woodland
CEGL006411 Thuja occidentalis / Gaylussacia baccata - Vaccinium angustifolium Woodland
CEGL006508 Thuja occidentalis - Fraxinus pennsylvanica / Acer pensylvanicum Woodland



Classifiers

Land Cover Class: Steppe/Savanna
Spatial Pattern: Small patch
Natural/Seminatural: No
Vegetated ( > 10% vascular cover):
Upland: Yes
Wetland: No
Isolated Wetland: No

Diagnostic Classifiers
Primary Classifier Secondary Classifier
Rock Outcrops/Barrens/Glades  
Glaciated  
Alkaline Soil  
Circumneutral Soil  

Non-diagnostic Classifiers
Primary Classifier Secondary Classifier
Lowland  
Forest and Woodland (Treed)  
Ridge/Summit/Upper Slope  
Mesotrophic Soil  
Very Shallow Soil  
Udic  
Consolidated  
Intermediate Disturbance Interval  
F-Patch/Medium Intensity  

Vegetation Composition (incomplete)
Species Name Rounded Global Status Growth Form Stratum Char-
acter-
istic
Domi-nant Con-stant
Cover Class %
Con-
stancy
%
Acer saccharum G5 Broad-leaved deciduous tree Tree canopy    
 
 
Fraxinus americana G5 Broad-leaved deciduous tree Tree canopy    
 
 
Thuja occidentalis G5 Needle-leaved tree Tree canopy    
 
 
Dasiphora fruticosa ssp. floribunda T5 Broad-leaved evergreen shrub Shrub/sapling (tall & short)    
 
 
Oligoneuron album G5 Flowering forb Herb (field)    
 
 
Dryopteris fragrans G5 Fern (Spore-bearing forb) Herb (field)    
 
 
Carex eburnea G5 Graminoid Herb (field)    
 
 
Clematis occidentalis G5 Liana Herb (field)    
 
 


Distribution
Color legend for Distribution Map
Nation: United States
United States Distribution: ME, NH, NY, VT
Global Range: Scattered locations from New England and adjacent Canada west to the eastern Great Lakes.

Biogeographic Divisions
Division Code and Name Primary Occurrence Status
201-Laurentian-Acadian C: Confident or certain

The Nature Conservancy's Conservation Ecoregions
Code Name Occurrence Status
48 Great Lakes Confident or certain
63 Northern Appalachian-Boreal Forest Confident or certain

MRLC 2000 Mapzones
Code Name Occurrence Status
63 Finger Lakes Confident or certain
64 Northeastern Highlands Confident or certain
66 The North Woods Confident or certain

National Mapping
ESLF Code (Ecological System Lifeform): 5461

West Landfire Legend: No
East Landfire Legend: No

Authors/Contributors
Element Description Edition Date: 09Jan2003
Element Description Author(s): S.C. Gawler

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


References
  • Comer, P., D. Faber-Langendoen, R. Evans, S. Gawler, C. Josse, G. Kittel, S. Menard, C. Nordman, M. Pyne, M. Reid, M. Russo, K. Schulz, K. Snow, J. Teague, and R. White. 2003-present. Ecological systems of the United States: A working classification of U.S. terrestrial systems. NatureServe, Arlington, VA.

  • Edinger, G. J., D. J. Evans, S. Gebauer, T. G. Howard, D. M. Hunt, and A. M. Olivero, editors. 2014a. Ecological communities of New York state. Second edition. A revised and expanded edition of Carol Reschke's ecological communities of New York state. New York Natural Heritage Program, New York State Department of Environmental Conservation, Albany, NY.

  • Eyre, F. H., editor. 1980. Forest cover types of the United States and Canada. Society of American Foresters, Washington, DC. 148 pp.

  • Gawler, S. C., and A. Cutko. 2010. Natural landscapes of Maine: A classification of vegetated natural communities and ecosystems. Maine Natural Areas Program, Department of Conservation, Augusta.

  • Sperduto, D. D., and W. F. Nichols. 2004. Natural communities of New Hampshire: A guide and classification. New Hampshire Natural Heritage Bureau, DRED Division of Forests and Lands, Concord. 242 pp.


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Ridgely, R.S., T.F. Allnutt, T. Brooks, D.K. McNicol, D.W. Mehlman, B.E. Young, and J.R. Zook. 2003. Digital Distribution Maps of the Birds of the Western Hemisphere, version 1.0. NatureServe, Arlington, Virginia, USA.

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Data last updated: March 2019