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Picea mariana Forest Alliance | Midwestern Ecology Working Group...
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Name: Picea mariana Forest Alliance Reference: Midwestern Ecology Working Group... Description: This alliance is found in the northern United States and southern Canada. It is not well defined in Canada, and further work may result in an extension of the range. Stands in this alliance have mostly to completely closed tree canopies. Tall and short shrubs are present to abundant. The vascular herbaceous layer is typically poorly developed, but nonvascular species, especially feathermosses, are very abundant. The canopy is composed of relatively pure stands of Picea mariana with smaller amounts of Abies balsamea, Betula papyrifera, Picea glauca, Pinus banksiana, Pinus strobus (in the southern part of this alliance's range), Populus tremuloides usually present. The shrub/sapling layer typically contains Abies balsamea, Picea mariana, Corylus cornuta (in the western part of this alliance's range), Diervilla lonicera (in the west), and numerous ericaceous shrubs such as Gaultheria procumbens, Kalmia angustifolia, Ledum groenlandicum, and Vaccinium spp. The herbaceous layer contains species often found in northern dry-mesic habitats, including Eurybia macrophylla (= Aster macrophyllus), Cornus canadensis, Clintonia borealis, and Maianthemum canadense. There is a prominent bryophyte layer of Pleurozium schreberi, Hylocomium splendens, and Ptilium crista-castrensis. Communities of this alliance occur on nutrient-poor loamy sands, sandy loams, and silts which may be shallow to moderately deep to bedrock. Stands may become established following fire, particularly on dry sandy soils. Boulders are often present on the surface or in the upper soil horizons. Communities in this alliance are typically on flat to gently sloping topography.  Accession Code: VB.CC.21497.PICEAMARIANAFOR Plot-observations of this Community Concept: 0
	Party Perspective according to: NatureServe (organization) Perspective from: 26-Nov-1997 to: 01-May-2019
	status: accepted This Community's Level: Alliance This Community's Children: [none]		Names:   Scientific: Picea mariana Forest Alliance   Translated: Black Spruce Forest Alliance   UID: HIGHER_CLASS_UNIT.2.125801 NatureServe Explorer   Code: A.149