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North American Boreal Conifer Poor Swamp Macrogroup | NatureServe Biotics 2019
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Name: North American Boreal Conifer Poor Swamp Macrogroup Reference: NatureServe Biotics 2019 Description: Boreal poor to intermediate swamp forests and woodlands develop on wet soils with permanent or semipermanent water tables at or near the soil surface, where the flow rate, subsurface depth and chemistry of groundwater determine site moisture and nutrient characteristics. These treed wetlands are common on the boreal landscape, occurring at scales ranging from small discrete patches in landscape depressions to extensive wetland complexes over large areas of level, poorly drained terrain. They usually occur on organic soils composed of sphagnum or graminoid peat. Regional west to east differences in nutrient levels: <i>Picea mariana</i> is dominant or codominant in nutrient-poor and intermediate peatlands, while <i>Larix laricina</i> occurs with <i>Picea mariana</i> across all regions in treed wetlands that are moderately well-supplied with nutrients (intermediate). In eastern Canada, <i>Abies balsamea</i> and <i>Betula papyrifera</i> also occur in intermediate wetlands; in western Canada, <i>Picea glauca</i> can be present. Several understory shrub, herb, moss and lichen species are indicative of relative moisture and nutrient status in these forests and woodlands. The poor swamps have a set of widely distributed characteristic species, such as <i>Ledum groenlandicum, Maianthemum trifolium, Chamaedaphne calyculata, Rubus chamaemorus, Kalmia polifolia</i>, and <i>Vaccinium oxycoccos</i>. Other species are regionally distributed: <i>Vaccinium vitis-idaea</i> is the primary <i>Vaccinium</i> species in western and northern Canadian poor swamps, while <i>Vaccinium myrtilloides</i> and <i>Vaccinium angustifolium</i> fill that role in eastern Canada; <i>Kalmia angustifolia</i> is an important heath component in eastern Canada.  Accession Code: urn:lsid:vegbank.org:commConcept:40631-{DAC35EAB-213F-4F34-9095-0E246A436BFB} Plot-observations of this Community Concept: 0
	Party Perspective according to: NatureServe (organization) Perspective from: 29-Mar-2017 to: ongoing
	status: accepted Community's Parent: Picea mariana - Larix laricina - Populus balsamifera Boreal Flooded & Swamp Forest Division This Community's Level: Macrogroup This Community's Children: Show/Hide   Picea mariana - Abies balsamea Atlantic Boreal Poor Swamp Group   Picea mariana Alaskan-Yukon Boreal Wet Forest Group   Picea mariana Ontario-Québec Boreal Poor Swamp Group   West-Central Boreal Black Spruce - Tamarack Poor Swamp Group		Names:   UID: ELEMENT_GLOBAL.2.860512 NatureServe Explorer   Code: M299   Scientific: North American Boreal Conifer Poor Swamp Macrogroup