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Danthonia spicata - Poa compressa - (Schizachyrium scoparium) Grassland | NatureServe Biotics 2019
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Name: Danthonia spicata - Poa compressa - (Schizachyrium scoparium) Grassland Reference: NatureServe Biotics 2019 Description: The poverty grass dry alvar grassland type occurs in the Great Lakes region of the United States and Canada, in southern Ontario, northern New York, and northern Michigan. Stands occur on shallow soils over flat limestone and dolostone outcrops (pavements). This community may occur in a patchy landscape mosaic with other alvar communities, most commonly juniper alvar shrubland, and annual alvar pavement-grassland. Soils of poverty grass dry alvar grasslands are very shallow loams (usually less than 10 cm deep). This community has a characteristic soil moisture regime of summer drought in most years. This grassland seems to occur on well-drained soils that are rarely, if ever, saturated or flooded; this interpretation is based on soil texture. Poverty grass dry alvar grassland is dominated by <i>Danthonia spicata</i> and <i>Poa compressa</i>, and sometimes <i>Schizachyrium scoparium</i>. There is less than 10% cover of trees, and less than 25% cover of shrubs. There is usually about 50% cover of herbs, and up to about 50% cover of nonvascular plants (mosses, lichens, and algae) growing on exposed limestone or dolostone pavement areas that occur as patches within the grassland. These grasslands are sometimes disturbed by grazing, which introduces exotic species and pasture grasses such as <i>Phleum pratense</i>.  Accession Code: urn:lsid:vegbank.org:commConcept:33865-{CBB59F62-74DA-4DA0-A0BA-93AC400C37DB} Plot-observations of this Community Concept: 0
	Party Perspective according to: NatureServe (organization) Perspective from: 22-Apr-1999 to: ongoing
	status: accepted Community's Parent: Sporobolus heterolepis - Deschampsia cespitosa / Dasiphora fruticosa Alvar Grassland Alliance This Community's Level: Association This Community's Children: [none]		Names:   UID: ELEMENT_GLOBAL.2.685201 NatureServe Explorer   Code: CEGL005100   Translated: Poverty Oatgrass - Canada Bluegrass - (Little Bluestem) Grassland   Common: Poverty Oatgrass Dry Alvar Grassland   Scientific: Danthonia spicata - Poa compressa - (Schizachyrium scoparium) Grassland (convergence) and Synonyms: (similar) CEGL005100 (similar) Danthonia spicata - Poa compressa - (Schizachyrium scoparium) Herbaceous Vegetation (similar) Danthonia spicata - Poa compressa - (Schizachyrium scoparium) Herbaceous Vegetation