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A.269 | EcoArt 2002
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Name: A.269 Reference: EcoArt 2002 Description: This alliance, found in the north-central United States and Canada has a tree canopy that is predominantly or completely composed of deciduous trees. This alliance is defined as containing a mixture of ~Populus tremuloides$ and ~Betula papyrifera$. The abundance of each can range from 10-90%. A few sites may be dominated by ~Acer rubrum$ or ~Populus grandidentata$ with lesser amounts of ~Populus tremuloides$ and ~Betula papyrifera$. Other trees may be found in minor amounts in the canopy but are often dominant in the sapling layer. These include ~Abies balsamea, Acer saccharum, Betula alleghaniensis, Fagus grandifolia$ (in the eastern portion of this alliance's range), ~Picea glauca, Quercus rubra$, and ~Tilia americana$. The density of the shrub layer varies inversely with the density of the canopy and subcanopy trees. Dry-mesic stands tend to have higher shrub cover. Most common shrubs are 1-2 m tall. Typical species of this layer include ~Acer spicatum, Amelanchier$ spp., ~Corylus cornuta, Diervilla lonicera, Prunus$ spp., ~Rosa acicularis$, and ~Rubus pubescens$. The herbaceous layer is often very diverse. ~Aralia nudicaulis, Eurybia macrophylla (= Aster macrophyllus), Clintonia borealis, Cornus canadensis, Galium triflorum, Maianthemum canadense, Pteridium aquilinum$, and ~Trientalis borealis$ are abundant members of the herbaceous layer. ^Stands of this alliance are typically early successional and become established on a variety of landscape positions. They have been found on moderately well-drained to very well-drained clay, loam, and sand soils. Stands can be found on ridgetops, upper, mid, and lower slopes with gentle to moderate slopes and on flat plains.  Accession Code: VB.CC.1879.A269 Plot-observations of this Community Concept: 0
	Party Perspective according to: NatureServe (organization) Perspective from: 26-Nov-1997 to: 17-Mar-2005
	status: accepted Community's Parent: I.B.2.N.b This Community's Level: Alliance This Community's Children: [none]		Names:   Code: A.269   Scientific: POPULUS TREMULOIDES - BETULA PAPYRIFERA FOREST ALLIANCE   Common: Quaking Aspen - Paper Birch Forest Alliance (convergence) and Synonyms: (undetermined) Populus tremuloides - Betula papyrifera Forest Alliance