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Name
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Reference
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Plots↓
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Description |
Comm #6851
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Tsuga mertensiana - Chamaecyparis nootkatensis / Vaccinium ovalifolium - Gaultheria shallon Woodland
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accession code: VB.CC.24584.TSUGAMERTENSIAN
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Western Ecology Working Group of... |
0
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Comm #6852
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A.1144
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accession code: VB.CC.917.A1144
NOT CURRENTLY ACCEPTED
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EcoArt 2002 |
0
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Comm #6853
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A.1170
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accession code: VB.CC.946.A1170
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EcoArt 2002 |
0
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Monodominant community dominated by ~Paspalidium geminatum var. paludivagum$, of semipermanently flooded zones of freshwater lakes. |
Comm #6854
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CEGL001192
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accession code: VB.CC.3788.CEGL001192
NOT CURRENTLY ACCEPTED
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EcoArt 2002 |
0
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Comm #6855
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Chamaedaphne calyculata - Ledum groenlandicum - Kalmia polifolia Bog Dwarf-shrubland
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accession code: VB.CC.37040.CEGL005278
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Midwestern Ecology Working Group... |
0
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This dwarf-shrub bog community is found in the northern Great Lakes region and across much of central Canada. Sites are found on raised bog landforms in large peatland complexes, basin bogs, and occasionally on shores (but still isolated from groundwater influence). Stands have a saturated hydrology with a fibric <i>Sphagnum</i> spp. peat soil and a pH usually <4.3. Vegetation is dominated by an open dwarf-shrub/scrub conifer layer with very scattered trees (<10% cover). Microtopography is high hummocks with weakly developed hollows. Ericaceous dwarf-shrubs are dominant, including <i>Chamaedaphne calyculata, Kalmia polifolia</i>, and <i>Ledum groenlandicum</i>, and the creeping dwarf-shrubs <i>Andromeda polifolia</i> and <i>Vaccinium oxycoccos</i>. Scrub conifers include <i>Larix laricina</i> and <i>Picea mariana</i>. They also occur as scattered trees (>3m). The herb layer is species poor, containing <i>Carex oligosperma, Carex pauciflora, Eriophorum vaginatum</i>, and <i>Sarracenia purpurea</i>. The moss layer forms a continuous hummocky mat dominated by <i>Sphagnum angustifolium, Sphagnum fuscum</i>, and <i>Sphagnum magellanicum</i>. Diagnostic features include the dominance of a dwarf-shrub ericaceous layer, absence of a tree layer (<10%), species-poor herbaceous layer, and almost complete lack of minerotrophic indicators, such as <i>Betula pumila, Carex aquatilis</i>, and <i>Carex stricta</i>. A possible subtype may occur in which pools form near the bogs crests, and contain maritime species such as <i>Scheuchzeria palustris, Rhynchospora alba, Sphagnum cuspidatum</i>, and <i>Utricularia cornuta</i>. |
Comm #6856
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Yucca brevifolia / Coleogyne ramosissima Wooded Shrubland
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accession code: VB.CC.31722.CEGL005294
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Western Ecology Working Group of... |
0
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This Joshua tree shrubland association is currently described from Grand Canyon National Park in Arizona. More survey and classification work are needed to fully characterize this type. It is restricted to low-level sideslopes and valley bottoms at 1475 to 1500 m (4875-4900 feet) elevation, but can occur as high as 1600 m (5275 feet). It is typically found on very gentle slopes (2-4°), but occasionally occurs on more moderate gradients (6-8°). It seems to occur across all aspects other than south-facing. Soils are rapidly-drained sandy loams that usually lie on top of limestone or basalt. Vegetation is characterized by the codominance of the tall shrub <i>Yucca brevifolia</i> and the short shrub <i>Coleogyne ramosissima</i>. <i>Yucca baccata, Ephedra viridis, Atriplex canescens</i>, and <i>Purshia stansburiana</i> also commonly occur in the short-shrub layer. <i>Opuntia basilaris</i> regularly occurs in the dwarf-shrub stratum, while <i>Agave utahensis</i> and <i>Gutierrezia microcephala</i> can be found sporadically. Native bunchgrasses, including <i>Bouteloua eriopoda, Muhlenbergia porteri, Bouteloua gracilis, Dasyochloa pulchella</i>, and <i>Tridens muticus</i>, occur in most stands at relatively low individual covers. The exotic <i>Bromus tectorum</i> is a frequent graminoid, and <i>Cymopterus purpurascens</i> and <i>Erodium cicutarium</i> occur most frequently in a poorly-developed forb layer. |
Comm #6857
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Ceratophyllum demersum - Vallisneria americana - Najas spp. Tidal Herbaceous Vegetation
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accession code: VB.CC.31391.CEGL006048
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Eastern Ecology Working Group of... |
0
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This association comprises mixed freshwater subtidal aquatic beds of the mid-Atlantic Coast. It occurs in fresh reaches of upper bays and tributaries within estuarine systems. Species composition is variable and includes <i>Vallisneria americana, Ceratophyllum demersum, Heteranthera dubia, Elodea canadensis, Najas guadalupensis, Najas gracillima, Najas minor, Potamogeton pusillus, Stuckenia pectinata (= Potamogeton pectinatus)</i>, and others. There is often a strong component of exotic species that can be locally or extensively dominant, including <i>Myriophyllum spicatum, Hydrilla verticillata</i>, and <i>Potamogeton crispus</i>. This association can have dramatic seasonal fluctuations in species composition and biomass. |
Comm #6858
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Coleogyne ramosissima - Ephedra spp. Warm Desert Shrubland
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accession code: VB.CC.31672.CEGL005297
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Western Ecology Working Group of... |
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This blackbrush shrubland association is currently described from Grand Canyon National Park in Arizona. More survey and classification work are needed to fully characterize this type. It occurs primarily on sideslopes but can be seen on a variety of landforms, including plateaus, ridges, terraces, and valley bottoms. It generally occurs from approximately 850 to 1575 m (2750-5150 feet) elevation. While predominantly found on flat or low-gradient settings (0-15°), this association occasionally occurs on moderate to steep slopes (30-40°) as well. Soils are predominantly rapidly-drained sandy loams that rarely contain silt and clay. The underlying geology is usually limestone, shale, or less frequently sandstone. When it occurs, this vegetation type often forms vast expanses across these environments. Trees and tall shrubs are essentially absent. A short-shrub layer dominated by <i>Coleogyne ramosissima</i> with <i>Ephedra</i> spp. as an associate characterizes this association. Three species of <i>Ephedra</i> are common, with <i>Ephedra fasciculata</i> and <i>Ephedra torreyana</i> occurring most frequently. <i>Ephedra viridis</i> also occurs, but its presence is sporadic. Additionally, the short-shrub stratum often includes <i>Yucca baccata</i>. A dwarf-shrub layer typically occurs and is dominated by <i>Opuntia polyacantha</i>. Occasionally <i>Agave utahensis</i> also occurs here. The desert grasses <i>Dasyochloa pulchella, Tridens muticus</i>, and <i>Vulpia octoflora</i> are all common in a fairly sparse graminoid layer, as well as the exotic <i>Bromus rubens</i>. A variety of species, including <i>Sphaeralcea grossulariifolia</i> and <i>Erodium cicutarium</i>, occur in the relatively sparse forb understory. |
Comm #6859
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Aesculus californica / Toxicodendron diversilobum / Moss Woodland
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accession code: VB.CC.31851.CEGL005302
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Western Ecology Working Group of... |
0
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This is a diverse woodland occurring on steep upper slopes, mostly north-facing, but it can occur on eastern and other aspects. The tree layer is dominated by <i>Aesculus californica</i>. <i>Quercus wislizeni</i> may be present as well in lower cover. The shrub layer has several species, of which <i>Toxicodendron diversilobum</i> is the most consistent, although it was not present in every stand sampled. Other shrubs that may be present include <i>Prunus ilicifolia, Diplacus aurantiacus (= Mimulus aurantiacus)</i>, and <i>Keckiella breviflora</i>. The herbaceous layer has a high and consistent cover of mosses, as well as overwhelmingly dominant introduced grasses. This type is documented from the foothills of the Sierra Nevada and from the interior Central Coast Ranges of California. |
Comm #6860
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Abies magnifica - Pinus monticola / Chrysolepis sempervirens Forest
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accession code: VB.CC.19992.ABIESMAGNIFICAP
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Western Ecology Working Group of... |
0
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