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Kobresia myosuroides - Geum rossii Alpine Turf | NatureServe Biotics 2019
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Name: Kobresia myosuroides - Geum rossii Alpine Turf Reference: NatureServe Biotics 2019 Description: This association is a major upland alpine turf community of the southern Rocky Mountains extending north into the Uinta Mountains from northern New Mexico to northeastern Utah. Sites are typically dry-mesic meadows and turf in the middle to lower alpine, which may extend into transition areas with fell-fields. Stands often occur on gentle to moderate, convex slopes (1-30%) and saddles, typically with NE-NW aspects that are exposed to prevailing winds which keep sites snow-free during most of the winter. Soils are relatively deep (0.5-1 m) and well-developed for alpine environments. Distinct soil horizons are typically present indicating long periods without significant disturbance. The A horizon has accumulations of organic material and fine soils particles (from loess) that take many years to occur. Soils are fine to coarse loams derived from igneous or metamorphic rocks such as granite and schist. There is often low to moderate (to 50 %) cover of large and small surface rocks. Bare ground cover is generally low but can be moderately high in transition areas with fell-fields. This alpine turf association is characterized by a moderately dense to dense (50-90% cover) herbaceous layer dominated by <i>Kobresia myosuroides</i> with <i>Geum rossii</i> codominant. If present, <i>Carex rupestris var. drummondiana</i> cover does not exceed that of <i>Geum rossii</i>. <i>Thalictrum alpinum</i> and <i>Trifolium dasyphyllum</i> are not codominant and generally have low cover (&lt;5% cover). <i>Minuartia obtusiloba</i> and/or <i>Selaginella densa</i> are often present and may be codominant in some stands. Other important species with lower cover include graminoids <i>Calamagrostis purpurascens, Danthonia intermedia, Deschampsia cespitosa, Festuca brachyphylla, Poa glauca ssp. rupicola, Trisetum spicatum</i>, and forbs <i>Artemisia scopulorum, Gentiana algida, Mertensia oblongifolia, Oreoxis alpina, Polygonum</i> spp., <i>Potentilla</i> spp., <i>Silene acaulis, Tonestus pygmaeus</i>, and <i>Trifolium nanum</i>. Diagnostic of this association is the dominance of <i>Kobresia myosuroides</i> and <i>Geum rossii</i> in a dense alpine turf.  Accession Code: urn:lsid:vegbank.org:commConcept:30817-{6013D183-8CF5-4BC2-BC92-B43E24367081} Plot-observations of this Community Concept: 0
	Party Perspective according to: NatureServe (organization) Perspective from: 02-Aug-2005 to: ongoing
	status: accepted Community's Parent: Carex elynoides - Carex rupestris - Kobresia myosuroides Rocky Mountain Alpine Turf Alliance This Community's Level: Association This Community's Children: [none]		Names:   UID: ELEMENT_GLOBAL.2.690088 NatureServe Explorer   Code: CEGL001908   Translated: Bellardi Bog Sedge - Ross' Avens Alpine Turf   Scientific: Kobresia myosuroides - Geum rossii Alpine Turf (convergence) and Synonyms: (similar) CEGL001908 (similar) Kobresia myosuroides - Geum rossii Herbaceous Vegetation (similar) Kobresia myosuroides - Geum rossii Herbaceous Vegetation