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A.1418 | EcoArt 2002
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Name: A.1418
Reference: EcoArt 2002
Description: Vegetation types within this seasonally flooded, temperate or subpolar grassland alliance occur on meadows, streambanks, and depressions in subalpine and alpine areas. Elevations range from 1750-2150 m in the Cascade Range, and from 3210-3540 m in Colorado. Sites typically are small depressions located below late-melting snowpatches on eastern slopes. Habitats are mostly southeast-facing and gently inclined (0-22%), 3-4 months snow-free, and well-stabilized. Soils are poorly drained with some peaty soil development. Soil pH levels range from 4.2-5.1. ~Carex nigricans$ forms a low, dominant mat with high average cover and frequency. Other prominent species in the Washington stands are ~Luetkea pectinata$ and ~Vahlodea atropurpurea (= Deschampsia atropurpurea)$. ~Polytrichadelphus lyalli, Pseudoleskea radicosa (= Lescuraea radicosa)$, and the lichen ~Lepraria neglecta$ are important cryptograms in the Washington stands. ~Phleum alpinum$ is a codominant in Colorado. Other constants are ~Deschampsia caespitosa$ and ~Juncus drummondii$. The moss layer in the Colorado stands is poorly developed. ~Carex nigricans$ is likely to form pure stands next to melting snowdrifts. 
Accession Code: VB.CC.1193.A1418
Plot-observations of this Community Concept: 0
      Party Perspective according to: NatureServe (organization)
Perspective from: 26-Nov-1997 to: 17-Mar-2005
     
  • status: accepted
  • Community's Parent: V.A.5.N.k
  • This Community's Level: Alliance
  • This Community's Children: [none]
Names:   Scientific: CAREX NIGRICANS SEASONALLY FLOODED HERBACEOUS ALLIANCE
  Code: A.1418
  Common: Black Alpine Sedge Seasonally Flooded Herbaceous Alliance
(convergence) and Synonyms:
(undetermined) Carex nigricans Seasonally Flooded Herbaceous Alliance