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Name
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Reference
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Plots↓
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Description |
Comm #12211
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Salix orestera / Senecio triangularis Shrubland
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accession code: VB.CC.18916.SALIXORESTERASE
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Western Ecology Working Group of... |
0
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Comm #12212
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CEGL000772
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accession code: VB.CC.3376.CEGL000772
NOT CURRENTLY ACCEPTED
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EcoArt 2002 |
0
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Comm #12213
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II.A.1.N.e
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accession code: VB.CC.729.IIA1NE
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EcoArt 2002 |
0
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Comm #12214
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A.1568
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accession code: VB.CC.1324.A1568
NOT CURRENTLY ACCEPTED
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EcoArt 2002 |
0
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Comm #12215
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Carex spectabilis - Arnica x diversifolia Herbaceous Vegetation
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accession code: VB.CC.32197.CEGL005867
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Western Ecology Working Group of... |
0
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This is a small-patch herbaceous association of the alpine of northwestern Montana, in Glacier National Park. It is characterized as a pioneer chionophilic community of recently deglaciated substrates in glacier-scoured cirque basins or on morainal or other talus slopes. The noted elevation span is from 2000 to 2400 m (6560-7870 feet), and all aspects are represented. Cirque basin margins are usually gently sloping or undulating and the colluvial slopes and newly exposed morainal walls do not much exceed a 20% grade. The community is found on soil patches having minimal development with large barren rock or gravel areas between patches. The total rock cover varies from 90% in earliest successional expressions to less than 40%, in later successional stages. Vegetation is restricted to the soil patches, which are often humus-rich and fine-textured. All sites have a moderate to mostly long-persisting snowpack approaching snowbed conditions and resulting in a mesic to hygric moisture regime. Meltwaters from adjacent snowbanks is virtually constant, supplied well into late summer. Vascular plant cover ranges from 10% to 65%, presumably following a gradient in time since exposure; these presumed younger stages have a low species richness of around 20 whereas older sites have up to 40 species. Prominent clumps of <i>Carex spectabilis</i> are the first vascular species to colonize these gravel barrens and rocky slopes, generating their own humus layers via decomposition of abundant foliage. Other graminoids with at least 50% constancy include <i>Luzula piperi, Phleum alpinum, Poa cusickii, Poa alpina, Juncus drummondii</i>, and <i>Carex nigricans</i>; the last two named species are faithful indicators of snowbed environments, whereas the first four are found on many area moraines as the first pioneering species. Forbs of high constancy and also known as colonizers are <i>Arnica x diversifolia, Epilobium anagallidifolium (= Epilobium alpinum), Oxyria digyna</i>, and <i>Ranunculus eschscholtzii</i>. Forbs with moderate to high constancy and indicative of high moisture status/snow persistence include <i>Veronica wormskjoldii, Senecio triangularis, Erigeron peregrinus, Hieracium gracile</i>, and <i>Sibbaldia procumbens</i>. Moss and lichen cover is less than 5% regardless of site age. |
Comm #12216
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Larix occidentalis / Clintonia uniflora Forest
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accession code: VB.CC.32157.CEGL005880
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Western Ecology Working Group of... |
0
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Broadly distributed throughout the northern Rocky Mountains and adjacent terrain, this large-patch to matrix seral community occupies relatively moist (mesic) and warm to cool sites having free air drainage and lacking frost pocket conditions. Elevations range in the north from760 to 1585 m (4500-5200 feet) (extreme outliers at 1710 m (5600 feet)), whereas to the south it ranges from 1060 to 1710 m (3500-5600 feet). It occurs on slopes of all degrees of steepness and aspect orientation, though it is more likely to occur from toeslope through midslope positions (predominantly collecting positions). At the dry extreme of its distribution it is more strongly associated with protected positions such as concave slopes, moist depressions on gentle slopes or plateaus, stringers along perennial stream bottoms, toeslopes and northeastern aspects. Though sites are mesic, verging on hygric, they are inferred to be only briefly or seasonally influenced, if at all, by a high water table; <i>Larix occidentalis</i> occurrence is strongly associated with well-drained positions. A wide variety of parent materials are represented, including those as disparate as granite and limestone, including all manner of glacial-fluvial material. In northern Idaho and northwestern Montana it is routinely found on ash caps, ranging from 3 to 60 cm in depth. The soil textures are predominantly loams and silt loams (reflecting in part the volcanic ash); soils typically have less than 15% coarse fragment content and are well-drained.<br><br>This mesic seral association is characterized by <i>Larix occidentalis</i> dominating the upper canopy, though other tree species occur with lesser cover, including both other species considered almost exclusively seral <i>Pinus contorta</i> and <i>Pinus monticola</i> and those capable of functioning as both seral and climax species, including those from warmer environments, <i>Pinus ponderosa</i> (very limited representation), <i>Pseudotsuga menziesii, Thuja plicata</i>, and <i>Tsuga heterophylla</i> and those of colder environments, <i>Abies lasiocarpa, Abies grandis</i>, and <i>Picea engelmannii</i>. The shrub layer may be highly diverse with tall shrubs (e.g., <i>Acer glabrum, Taxus brevifolia, Amelanchier alnifolia</i>), short shrubs (<i>Symphoricarpos albus, Paxistima myrsinites, Rubus parviflorus, Spiraea betulifolia</i>), and dwarf-shrubs (e.g., <i>Chimaphila umbellata, Linnaea borealis, Mahonia repens</i>) abundantly represented. The graminoid component is inconspicuous with no one species exhibiting high constancy, though <i>Bromus vulgaris, Bromus ciliatus</i>, and <i>Calamagrostis rubescens</i> are more consistently present and with greater cover than other graminoids. The cover of the diagnostic forbs <i>Clintonia uniflora</i> and <i>Tiarella trifoliata</i> is greatest when this type occurs in the zones potentially dominated by <i>Thuja plicata</i> and <i>Tsuga heterophylla</i>, up to 30% canopy cover (can even be a dominant forb), whereas in the colder environments characterized by <i>Abies lasiocarpa, Abies grandis</i>, and <i>Picea engelmannii</i> potential dominance cover of these diagnostics and all forbs is generally less. Other forbs of high constancy, at least in some portion of this association's considerable range, are <i>Aralia nudicaulis, Adenocaulon bicolor, Coptis occidentalis, Cornus canadensis, Galium triflorum, Goodyera oblongifolia, Maianthemum stellatum, Osmorhiza berteroi (= Osmorhiza chilensis), Orthilia secunda (= Pyrola secunda), Thalictrum occidentale, Trillium ovatum, Viola glabella</i> (or <i>Viola canadensis</i>), and <i>Viola orbiculata</i>. |
Comm #12217
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CEGL004457
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accession code: VB.CC.6012.CEGL004457
NOT CURRENTLY ACCEPTED
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EcoArt 2002 |
0
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Comm #12218
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Artemisia tridentata ssp. spiciformis / Carex geyeri Shrubland
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accession code: VB.CC.18648.ARTEMISIATRIDEN
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Western Ecology Working Group of... |
0
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Comm #12219
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A.1168
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accession code: VB.CC.943.A1168
NOT CURRENTLY ACCEPTED
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EcoArt 2002 |
0
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Comm #12220
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Rhus trilobata - Ribes cereum Shrubland
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accession code: VB.CC.31687.CEGL002333
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Western Ecology Working Group of... |
0
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This shrubland association is currently only known from El Malpais National Monument in New Mexico, and the following description is based on occurrences there. Additional information will be added as it becomes available. This association occurs between 2110-2420 m (6930-7940 feet) in elevation on gently rolling lava plateaus and collapse features. Substrates are typically weathered, rough, and broken lava from Twin Craters and Bandera flows. The ground surface cover is composed of lava rock and gravel, with areas interspersed where finer wind- or water-borne soils have accumulated. A well-developed shrub canopy (mean cover around 13%) is characteristic of this mesic association, with <i>Rhus trilobata</i> and <i>Ribes cereum</i> the dominant species and <i>Forestiera pubescens</i> a frequent associate. Tree species such as <i>Juniperus monosperma, Pinus edulis</i>, or <i>Populus tremuloides</i> are frequently present in these shrublands as saplings or mature individuals, but never exceed 10% total cover. Herbaceous species occur most abundantly in the patches of finer soil and reach about 8% cover, which is typically equally distributed between graminoids and forbs. <i>Bouteloua gracilis, Piptatherum micranthum</i>, and <i>Poa fendleriana</i> are the most frequently occurring graminoids, though individual cover is low. <i>Artemisia carruthii</i> is the most frequently occurring amongst the forb species identified from this association. |
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