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Picea glauca - Thuja occidentalis - Juniperus communis / Iris lacustris - Carex eburnea Shrubland | Midwestern Ecology Working Group...
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Name: Picea glauca - Thuja occidentalis - Juniperus communis / Iris lacustris - Carex eburnea Shrubland Reference: Midwestern Ecology Working Group... Description: The scrub conifer / dwarf lake iris alvar shrubland type is found in the central Great Lakes region of the United States and Canada, in northern Michigan, and in Ontario on the southern shores of Manitoulin Island and the Bruce Peninsula. Stands occur on very shallow organic soils (usually 20-30 cm deep) over flat limestone or dolostone outcrops (pavements). This community has a characteristic soil moisture regime of seasonal flooding or saturation in early spring and late fall, combined with summer dry periods in most years (except unusually wet years). This community often occurs as openings within a forested landscape; it is not always associated with other alvar communities. When it occurs in a landscape mosaic with other alvar communities, it typically occurs as small patches adjacent to little bluestem alvar grassland, creeping juniper - shrubby cinquefoil alvar pavement, and tufted hairgrass wet alvar grassland. Scrub conifer / dwarf lake iris alvar shrubland has over 25% cover of tall and short shrubs. The tall shrubs (2-5 m tall) in this shrubland are scrub forms of tree species such as Picea glauca, Thuja occidentalis, Larix laricina, and Abies balsamea. There is less than 10% cover of trees over 5 m tall. The typical short shrubs (0.5-2 m tall) are Juniperus communis, Prunus virginiana, Diervilla lonicera, Shepherdia canadensis, Cornus sericea, and Rhamnus alnifolia. Underneath and between the shrubs is a 'lawn' dominated by Iris lacustris and Carex eburnea. Other characteristic species are Arctostaphylos uva-ursi, Carex richardsonii, and Danthonia spicata. The herbaceous layer has an average of 82% cover. Less than 10% of the ground surface is exposed bedrock, including bedrock covered with lichens and mosses.  Accession Code: VB.CC.27330.PICEAGLAUCATHUJ Plot-observations of this Community Concept: 0
	Party Perspective according to: NatureServe (organization) Perspective from: 02-Mar-1998 to: 17-Nov-2014
	status: accepted Community's Parent: Juniperus communis Shrubland Alliance This Community's Level: Association This Community's Children: [none]		Names:   Translated: White Spruce - Northern White-cedar - Common Juniper / Dwarf Lake Iris - Bristleleaf Sedge Shrubland   UID: ELEMENT_GLOBAL.2.690045 NatureServe Explorer   Scientific: Picea glauca - Thuja occidentalis - Juniperus communis / Iris lacustris - Carex eburnea Shrubland   Code: CEGL005211   Common: Scrub Conifer / Dwarf Lake Iris Alvar Shrubland (convergence) and Synonyms: (undetermined) Picea glauca - Thuja occidentalis - Juniperus communis / Iris lacustris - Carex eburnea Shrubland