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Thuja occidentalis - Fraxinus nigra - Acer rubrum Swamp Forest Group | NatureServe Biotics 2019
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Name: Thuja occidentalis - Fraxinus nigra - Acer rubrum Swamp Forest Group Reference: NatureServe Biotics 2019 Description: These forested wetlands are found across the temperate regions of eastern to south-central Canada, southward from northern New England to the upper Midwest and down to the high plateau of the Allegheny Mountains. They occur in areas where circumneutral to alkaline pH and/or higher nutrient levels are associated with a rich flora. Examples of this group also occur within swales along the dunes of the Great Lakes. The substrate is typically mineral soil, but there may be extensive peat in examples occurring on the margins of peatland complexes. <i>Thuja occidentalis</i> is a diagnostic canopy species and may dominate the canopy or be mixed with other conifers or with deciduous trees, most commonly <i>Acer rubrum</i> or <i>Fraxinus nigra</i>. Some examples are strongly dominated by deciduous hardwoods, such as <i>Fraxinus nigra</i> (less often <i>Fraxinus americana</i>) and <i>Acer rubrum</i>. <i>Larix laricina</i>, a deciduous conifer, may dominate some stands within this group. Shrub species commonly occur and range in cover from sparse to dense depending on canopy cover. The herb layer tends to be more diverse than in acidic swamps and some examples may have extensive bryophytes. Examples of this group may occur on seepages, in a basin setting, or alluvial settings. A hummock-and-hollow topography is typical. Logging, especially of <i>Thuja occidentalis</i>, has influenced the structure and dominance of many examples of this group.  Accession Code: urn:lsid:vegbank.org:commConcept:39769-{EE57DC1C-07EC-4EA0-839A-6D4AEFA576C3} Plot-observations of this Community Concept: 0
	Party Perspective according to: NatureServe (organization) Perspective from: 28-May-2013 to: ongoing
	status: accepted Community's Parent: Tsuga canadensis - Fraxinus nigra - Chamaecyparis thyoides Flooded & Swamp Forest Macrogroup This Community's Level: Group This Community's Children: Show/Hide   Fraxinus nigra - Acer rubrum - Larix laricina Swamp Forest Alliance   Thuja occidentalis - Acer rubrum - Larix laricina Swamp Forest Alliance   Tsuga canadensis - Pinus strobus Swamp Forest Alliance		Names:   UID: ELEMENT_GLOBAL.2.836789 NatureServe Explorer   Code: G046   Scientific: Thuja occidentalis - Fraxinus nigra - Acer rubrum Swamp Forest Group