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Pinus rigida Barrens Group | NatureServe Biotics 2019
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Name: Pinus rigida Barrens Group Reference: NatureServe Biotics 2019 Description: This group encompasses woodlands dominated by <i>Pinus rigida</i>, or by <i>Pinus rigida</i> mixed with oak species, occurring on dry and nutrient-poor soils and mostly maintained by fire. <i>Quercus rubra, Pinus strobus</i>, and <i>Betula populifolia</i> are common associates in the north, while <i>Quercus stellata</i> is characteristic in the south. A tall-shrub layer of <i>Quercus ilicifolia, Quercus prinoides</i>, and, south of New England, <i>Quercus marilandica</i> are commonly present, although portions of some barrens (or occasionally the entire barrens) lack the scrub oak component. A well-developed low-shrub layer is typical, with lowbush <i>Vaccinium</i> spp., <i>Gaylussacia baccata</i>, and <i>Comptonia peregrina</i> characteristic. The main constituents of this group are the associations that characterize the pine barrens of sandy substrates in the northeastern United States; the group also contains associations in which <i>Pinus rigida</i> dominates thin-soiled rocky hilltops. Substrates are of two major types: (1) deep sandy soils of outwash plains, stabilized inland sand dunes, and glacial till; and (2) less commonly, thin-soiled outcrops of acidic bedrock along exposed low-elevation ridgelines and upper slopes. The soils are consequently coarse-textured, acidic, mostly well-drained to xeric, and low in nutrients. <i>Pinus rigida</i> is the usual dominant, and cover may range from closed-canopy forest to (more typically) open woodlands.  Accession Code: urn:lsid:vegbank.org:commConcept:39973-{4D91095A-C90A-48E1-A0A8-076021654BE9} Plot-observations of this Community Concept: 0
	Party Perspective according to: NatureServe (organization) Perspective from: 17-Apr-2013 to: ongoing
	status: accepted Community's Parent: Appalachian-Northeastern Oak - Hardwood - Pine Forest & Woodland Macrogroup This Community's Level: Group This Community's Children: Show/Hide   Pinus rigida Dwarf-scrub Alliance   Pinus rigida - Pinus echinata Woodland Alliance   Pinus rigida - Quercus alba - Quercus stellata Woodland Alliance   Pinus rigida Rocky Woodland Alliance   Pinus rigida Sandy Woodland Alliance		Names:   UID: ELEMENT_GLOBAL.2.833287 NatureServe Explorer   Code: G161   Scientific: Pinus rigida Barrens Group