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Picea mariana - Picea rubens / Rhododendron canadense / Cladina spp. Woodland | Eastern Ecology Working Group of...
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Name: Picea mariana - Picea rubens / Rhododendron canadense / Cladina spp. Woodland Reference: Eastern Ecology Working Group of... Description: These undulating barrens are found on cold lowland flats of glacially-derived materials at near-boreal latitudes in northern New England and may extend into adjacent Canada. The soils are highly acidic and nutrient-poor. The sandy to clay soils over till can vary with the microtopography from well-drained to very poorly drained, often within the same site. The wetter pockets may have a shallow peat layer (ca. 25 cm or less) over the mineral soil. The canopy is usually open (25-60% closure), occasionally with areas of more closed canopy. The shrub-sapling layer is usually at least 25% and may be locally dense. Dwarf-shrubs, herbs, and tree regeneration cover the ground layer. The bryoid layer is usually well-developed and often essentially continuous. Dominant trees are Picea mariana, Picea rubens, and often hybrids of the two. Less common, but frequent, are Acer rubrum, Abies balsamea, Pinus strobus, and Populus grandidentata. Shrub cover is usually dominated by small spruce and fir, sometimes with Betula populifolia, Pinus strobus, and Sorbus decora or Sorbus americana. Nemopanthus mucronatus is a typical shrub. Ericaceous dwarf-shrubs are almost always present, with Rhododendron canadense, Kalmia angustifolia, and Vaccinium angustifolium (and possibly Vaccinium myrtilloides) the most abundant. Herbs are rarely abundant; frequent species include Pteridium aquilinum, Cornus canadensis, Maianthemum canadense, Coptis trifolia, and Aralia nudicaulis. Local moisture appears to influence the distribution of bryoids, with Dicranum and Polytrichum mosses in the more moist portions and Cladina spp. lichens in the drier areas. These barrens appear to be fire-maintained.  Accession Code: VB.CC.22934.PICEAMARIANAPIC Plot-observations of this Community Concept: 0
	Party Perspective according to: NatureServe (organization) Perspective from: 29-Jan-2003 to: 17-Nov-2014
	status: accepted Community's Parent: Picea mariana Woodland Alliance This Community's Level: Association This Community's Children: [none]		Names:   Translated: Black Spruce - Red Spruce / Rhodora / Reindeer Lichen species Woodland   UID: ELEMENT_GLOBAL.2.686890 NatureServe Explorer   Code: CEGL006421   Scientific: Picea mariana - Picea rubens / Rhododendron canadense / Cladina spp. Woodland (convergence) and Synonyms: (undetermined) Picea mariana - Picea rubens / Rhododendron canadense / Cladina spp. Woodland