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CEGL004388 Coastal Plain Acidic Cliff Vegetation

Type Concept Sentence: No Data Available


Common (Translated Scientific) Name: Coastal Plain Acidic Cliff Vegetation

Colloquial Name: Coastal Plain Acidic Cliff

Hierarchy Level:  Association

Type Concept: This sparsely vegetated cliff association occurs in the Coastal Plain of the southeastern United States. Examples are found on steep to vertical outcrops of acidic unconsolidated sediments, generally on river bluffs. Vegetation is sparse, consisting of scattered trees, shrubs, herbs, and sometimes bryophytes that include weedy species, species of the adjacent forest communities, along with species of open dry and open wet habitats. Pinus taeda, Morella cerifera, and Andropogon spp. are frequent. Most of the species are acid-tolerant, and more basophilic species are largely absent.

Diagnostic Characteristics: No Data Available

Rationale for Nominal Species or Physiognomic Features: No Data Available

Classification Comments: A cliff may be defined as a vertical or near-vertical face of bare substrate at least 3 m high. This community shares many species with ~Piedmont Acidic Cliff Vegetation (CEGL003979)$$ and was previously regarded as synonymous. However, many of the most characteristic species, such as Morella cerifera and Pinus taeda are scarce and infrequent on Piedmont cliffs. Characteristic Piedmont cliff species that do not typically occur on Coastal Plain cliffs include Pinus virginiana, Chionanthus virginicus, Rhododendron spp., Vaccinium pallidum, Danthonia spicata, Cheilanthes lanosa, Solidago caesia, Pleopeltis polypodioides, and Hieracium venosum. The instability of Coastal Plain cliffs gives them a different ecological dynamic than hard rock cliffs.

Similar NVC Types: No Data Available
note: No Data Available

Physiognomy and Structure: No Data Available

Floristics: Vegetation is sparse, consisting of scattered trees, shrubs, herbs, and sometimes bryophytes that include weedy species, species of the adjacent forest communities, along with species of open dry and open wet habitats. A denser zone of vegetation may occur at the top of the cliff or on slumped material at its base. Pinus taeda, Morella cerifera, and Andropogon spp. are frequent, at least in North Carolina, the former sometimes occurring only as seedlings or saplings. Other species include Vaccinium arboreum, Liquidambar styraciflua, Acer floridanum, Ilex decidua, Cyrilla racemiflora, Eupatorium capillifolium, Mikania scandens, Muhlenbergia schreberi, and Hydrocotyle verticillata. Most of the species are acid-tolerant, and more basophilic species are largely absent. However, calcareous seepage may allow basophilic species to occur in limited portions of the community.

Dynamics:  Coastal Plain cliffs are generally dynamic compared to hard rock cliffs in other regions. Without periodic undercutting and slumping, primary succession can lead to a forest community in a fairly short time. Between slumps, Coastal Plain cliffs are also more dynamic, being more prone to small-scale slumps and local erosion by runoff.

Environmental Description:  This sparsely vegetated cliff association occurs on steep to vertical faces of unconsolidated or marginally consolidated sediments. Typical substrates are sand, clay, and weakly cemented sandstone. Because the material is soft and breaks down more quickly to soil than hard rock, Coastal Plain cliffs generally occur only where active undercutting by streams triggers repeated slumping. Most of the extent of cliff faces in this community is dry, but local seepage zones may occur, especially near the top.

Geographic Range: This association occurs in the Mid-Atlantic Coastal Plain and likely in most portions of the Coastal Plain.

Nations: US

States/Provinces:  AL?, GA?, LA?, MS?, NC, SC?, TX?, VA?




Confidence Level: Low - Poorly Documented

Confidence Level Comments: No Data Available

Grank: G2?

Greasons: No Data Available


Concept Lineage: No Data Available

Predecessors: No Data Available

Obsolete Names: No Data Available

Obsolete Parents: No Data Available

Synonomy: No Data Available

Concept Author(s): M.P. Schafale

Author of Description: M.P. Schafale

Acknowledgements: No Data Available

Version Date: 03-02-09

  • Schafale, M. P. 2012. Classification of the natural communities of North Carolina, 4th Approximation. North Carolina Department of Environment, Health, and Natural Resources, Division of Parks and Recreation, Natural Heritage Program, Raleigh.
  • Schafale, M. P., and A. S. Weakley. 1990. Classification of the natural communities of North Carolina. Third approximation. North Carolina Department of Environment, Health, and Natural Resources, Division of Parks and Recreation, Natural Heritage Program, Raleigh. 325 pp.
  • Southeastern Ecology Working Group of NatureServe. No date. International Ecological Classification Standard: International Vegetation Classification. Terrestrial Vegetation. NatureServe, Durham, NC.