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A.1352 | EcoArt 2002
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Name: A.1352
Reference: EcoArt 2002
Description: This alliance occurs in deflation plains and topographic depressions of coastal dunes along the northwestern Pacific Coast in Oregon. Precipitation averages 120-200 cm annually, falling mostly as rain. Temperatures are cool in summer with abundant fog, and frost is infrequent. These habitats typically have standing fresh or brackish water on the surface for 1-3 months per year. Soils are moist stabilized sands with little organic material and are nutrient-poor. These communities typically contain a discontinuous ground layer of ~Juncus falcatus$. ~Trifolium wormskioldii$ is often codominant. Other herbaceous associates include ~Symphyotrichum subspicatum (= Aster subspicatus), Sisyrinchium californicum, Holcus lanatus$, and ~Mimulus guttatus$. Other herbaceous species in the deflation swales where this alliance occurs are ~Carex obnupta$ and ~Argentina egedii ssp. egedii (= Potentilla pacifica)$ in microhabitats with a somewhat longer hydroperiod, and ~Typha latifolia$ around the edges of permanent dune ponds. Adjacent vegetation is varied, from dune front associations of ~Leymus mollis - Abronia latifolia, Ammophila arenaria$, and ~Poa macrantha - Lathyrus littoralis$ on adjacent active dunes, to ~Pinus contorta$ and ~Picea sitchensis$ forests at the landward edge. Adjacent, wetter swale or marsh habitats often contain ~Salix - Myrica$ wet shrublands and/or ~Carex obnupta$ wet meadows. 
Accession Code: VB.CC.1126.A1352
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.j
  • This Community's Level: Alliance
  • This Community's Children: [none]
Names:   Scientific: JUNCUS FALCATUS TEMPORARILY FLOODED HERBACEOUS ALLIANCE
  Code: A.1352
  Common: Sickle-leaf Rush Temporarily Flooded Herbaceous Alliance
(convergence) and Synonyms:
(undetermined) Juncus falcatus Temporarily Flooded Herbaceous Alliance