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Name
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Reference
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Plots↓
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Description |
Comm #6471
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Salix planifolia Shrubland
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accession code: VB.CC.32551.CEGL001224
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Western Ecology Working Group of... |
0
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Comm #6472
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Populus tremuloides / Amelanchier alnifolia Forest
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accession code: VB.CC.24764.POPULUSTREMULOI
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Western Ecology Working Group of... |
0
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Comm #6473
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CEGL006014
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accession code: VB.CC.6601.CEGL006014
NOT CURRENTLY ACCEPTED
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EcoArt 2002 |
0
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Comm #6474
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Aquilegia flavescens - Senecio megacephalus Sparse Vegetation
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accession code: VB.CC.32148.CEGL005899
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Western Ecology Working Group of... |
0
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This community has been documented primarily from subalpine to alpine sites proximal to the Continental Divide in northwestern Montana (Glacier National Park), principally on its western side. This is a tall-forb community typical of steep (45-70%) scree slopes having predominantly west- through southeast-facing exposures (the most wind-impacted by prevailing southwesterlies) with northern exposures completely unrepresented. Snowbank formation at the heads of these slopes may persist into August, providing subirrigation to downslope vegetation via meltwater. Vegetation structure with tall mesophytic forbs dominant is testimony to a favorable moisture status. This community occurs mainly where the most extensive scree fields are concentrated, from the upper limits of continuous vegetation at 1890 m (6200 feet) to the rocky summit region above, the highest elevation sample recorded at 2210 m (7250 feet). Though occurring primarily on green argillite, it also occurs on red argillite, sandstone and limestone. Humus accumulation is restricted to vegetation clumps, and there is essentially no profile development due to ongoing soil action (creep and slides) and congeliturbation. Though rock cover is high (60-100%), it can act to promote mesic conditions by the overlapping of shale/argillite slabs to cover finer mineral soil, thus retarding evaporation. Litter cover is highly variable, mostly less than 5%, but occasionally as high as 30%. Structurally this is a very open (mostly less than 20% canopy cover, as high as 65%), tall-forb community with much visible rock and mineral soil surface. Overtopping the lower growing mats of the woody <i>Penstemon ellipticus</i> and highly constant <i>Phacelia hastata</i> are the considerably taller forbs <i>Senecio megacephalus, Aquilegia flavescens, Chamerion angustifolium (= Epilobium angustifolium)</i>, and <i>Symphyotrichum foliaceum (= Aster foliaceus)</i>. Other tall forbs less consistently present include <i>Cirsium hookerianum, Potentilla diversifolia, Achillea millefolium, Arnica x diversifolia</i>, and <i>Valeriana sitchensis</i>. Shorter forbs occurring in somewhat fewer than half the plots include <i>Epilobium anagallidifolium (= Epilobium alpinum), Sedum lanceolatum, Castilleja miniata</i>, and <i>Galium boreale</i>. <i>Elymus alaskanus ssp. latiglumis (= Agropyron latiglume)</i> is the only characteristic graminoid. Mosses and lichens usually comprise less than 1% canopy cover. |
Comm #6475
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A.1521
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accession code: VB.CC.1280.A1521
NOT CURRENTLY ACCEPTED
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EcoArt 2002 |
0
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This alliance, found in the western United States, occurs on flat to gently rolling sites, often with fine soils. Stands can be found on uplands or dry alluvial plains. The herbaceous layer is composed of moderately open to moderately dense mid grasses and short grasses. The shrub layer is typically 10-30% but may be higher in some stands. ~Pascopyrum smithii$ is the dominant species, typically accompanied by ~Bouteloua gracilis, Koeleria macrantha, Nassella viridula, Sphaeralcea coccinea$, and ~Hesperostipa comata (= Stipa comata)$. ~Artemisia tridentata$ is the most abundant shrub. |
Comm #6476
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Annona glabra / Cladium mariscus ssp. jamaicense Forest
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accession code: VB.CC.36519.CEGL007618
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Areces-Mallea, A. E., A. S. Weak... |
0
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Comm #6477
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Alaska Arctic Large River Floodplain
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accession code: urn:lsid:ecoobs.vegbank.org:commConcept:8984-{62D45181-9761-459F-8678-490443A03938}
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Western Ecology Working Group of... |
0
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Comm #6478
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Acadian Estuary Marsh
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accession code: urn:lsid:ecoobs.vegbank.org:commConcept:8481-{CFB662C2-C121-4C95-9744-D6D51861A378}
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Comer et al. 2003 |
0
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Comm #6479
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Abies lasiocarpa - Picea engelmannii / Vaccinium scoparium / Xerophyllum tenax Forest
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accession code: VB.CC.32203.CEGL005914
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Western Ecology Working Group of... |
0
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This forest association occurs in the subalpine zone in the central and northern Rocky Mountains near and west of the Continental Divide where climate is influenced by maritime weather. Elevations range from 1585-2530 m (5200-8300 feet) depending on latitude and landform (frost pockets are lower). Sites are cool and include upper subalpine, wind-swept upper ridge slopes, and frost pockets. Substrates are typically well-drained, coarse- to fine-textured soils (loamy sand to silt) with moderate gravel content (25-36%) that are derived from a wide variety of sedimentary, metamorphic and igneous parent materials. Litter dominates ground surface often over 2 cm deep with low cover of bare ground and rock. Vegetation is characterized by <i>Abies lasiocarpa</i> and <i>Picea engelmannii</i> codominating the tree canopy, with the dwarf-shrub <i>Vaccinium scoparium</i> codominating the understory with clumps of <i>Xerophyllum tenax</i>. The evergreen needle-leaved tree canopy is open to moderately dense (20-70% cover) and is typically codominated by <i>Abies lasiocarpa, Picea engelmannii</i> and mature seral trees, with <i>Abies lasiocarpa</i> dominating the subcanopy and regeneration layers. <i>Pinus contorta</i> is the most important seral species, but scattered <i>Pinus albicaulis</i> or <i>Pseudotsuga menziesii</i> may be present. Undergrowth is typically an open to dense dwarf-shrub layer dominated by <i>Vaccinium scoparium</i> (10-50% cover), however, <i>Vaccinium myrtillus</i> or <i>Vaccinium caespitosum</i> may be well-represented. <i>Vaccinium membranaceum</i> may form an open short-shrub layer. The herbaceous layer would be sparse except for cover of <i>Xerophyllum tenax</i> (20-60%). Relatively consistent forbs and graminoids may include <i>Arnica</i> spp., <i>Calamagrostis rubescens, Carex geyeri, Orthilia secunda (= Pyrola secunda), Viola orbiculata</i>, and <i>Valeriana sitchensis</i>. <i>Luzula glabrata var. hitchcockii</i> is absent or uncommon (<1% cover). |
Comm #6480
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Juglans microcarpa Shrubland
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accession code: VB.CC.19978.JUGLANSMICROCAR
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Western Ecology Working Group of... |
0
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