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Picea mariana - Populus tremuloides Forest Alliance | Midwestern Ecology Working Group...
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Name: Picea mariana - Populus tremuloides Forest Alliance Reference: Midwestern Ecology Working Group... Description: This alliance is found in the extreme north-central United States and adjacent Canada. The tree layer is dominated by a moderately closed to closed canopy of mixed coniferous and deciduous species. Populus tremuloides is the only common deciduous tree, but scattered Betula papyrifera and Populus balsamifera are also found. Picea mariana is the most abundant coniferous species, and often the most abundant canopy species. Abies balsamea, Picea glauca, and Pinus banksiana are typical associated conifers. The shrub layer is typically 1 m tall or less and ranges from open to dense. Species found in this layer include Diervilla lonicera, Ledum groenlandicum, Linnaea borealis, Rosa acicularis, Rubus pubescens, Vaccinium angustifolium, and Vaccinium myrtilloides. The herbaceous layer has great diversity. Aralia nudicaulis, Eurybia macrophylla (= Aster macrophyllus), Cornus canadensis, Coptis trifolia, Maianthemum canadense, Petasites frigidus, Trientalis borealis, and Viola renifolia are common herbaceous species. Mosses also cover a substantial portion of the forest floor. Stands of this alliance are found on flat to gently sloping sites with fresh to moist mineral soils. Soil texture is most often coarse loam, but can be clay, silt, or sand. Fine-textured soils tend to be on lacustrine substrates while coarse-textured soils result from morainal or glaciofluvial substrates. In Ontario, stands of this alliance often occur on calcareous soil.  Accession Code: VB.CC.21767.PICEAMARIANAPOP 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 - Populus tremuloides Forest Alliance   Translated: Black Spruce - Quaking Aspen Forest Alliance   UID: HIGHER_CLASS_UNIT.2.125113 NatureServe Explorer   Code: A.414