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Reference
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Description |
Comm #8431
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Quercus gambelii - Robinia neomexicana / Muhlenbergia montana Shrubland
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accession code: VB.CC.31769.CEGL005380
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Western Ecology Working Group of... |
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This association is only known to occur at Bandelier National Monument in north-central New Mexico. The current description is based on data received from there and will be updated when additional inventory data are available. This mid-elevation association occurs on sites with low to high solar exposure that increases with elevation. Stands occur on gentle to moderate slopes (5-20%) including rolling mesatops and mountain shoulder slopes, and occasionally on steep canyon slopes (>40%). Soils are primarily well-developed Mollisols derived from pumice, or occasionally fine-textured Alfisols derived from eolian deposits over rhyolitic tuff residuum. The ground surface is typically characterized by scattered bunchgrasses amid litter, pumice gravel, or exposed soil. Elevation ranges between 2050 and 2585 m (6720-8480 feet). This montane shrubland typically occurs in burned areas that once supported pine and mixed conifer forests. Shrub cover can exceed 80% and is dominated by deciduous broadleaf <i>Quercus gambelii</i> and <i>Robinia neomexicana</i> (occasionally <i>Quercus gambelii</i> can be present as mature trees). Common to abundant shrub associates may include <i>Ceanothus fendleri, Cercocarpus montanus, Quercus x pauciloba, Rosa woodsii</i>, and <i>Symphoricarpos oreophilus</i>. Tree seedlings and saplings (<i>Abies concolor, Pinus ponderosa</i>, and <i>Pseudotsuga menziesii</i>) may be present. The herbaceous layer is moderately rich in species but variable in cover (5-50%). A grassy understory is diagnostic and is characterized by well-represented to abundant <i>Muhlenbergia montana</i> with <i>Blepharoneuron tricholepis</i> and <i>Schizachyrium scoparium</i> as occasional codominants. <i>Andropogon gerardii, Bouteloua gracilis, Elymus elymoides</i>, or <i>Poa fendleriana</i> are also common associates. On sites that have been seeded following fire, <i>Bromus inermis, Festuca idahoensis</i>, and <i>Pascopyrum smithii</i>, among others, can be common to abundant. While forbs are diverse, composition is variable from stand to stand, and cover is usually less than 5%. |
Comm #8432
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Pinus ponderosa / Forestiera pubescens Woodland
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accession code: VB.CC.31767.CEGL005384
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Western Ecology Working Group of... |
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This association is only known to occur at Bandelier National Monument in north-central New Mexico. The current description is based on data received from there and will be updated when additional inventory data are available. This riparian association occurs at elevations between 1660 and 2035 m (5450-6675 feet) along canyon bottoms with low to moderate solar exposure. Stands occur on alluvial terraces and bars adjacent to perennial stream channels with gradients between 5 and 10% (in a few cases, stands are found along moist ephemeral or intermittent channels). Soils are mapped as loamy Mollisols derived from latite, dacite, and rhyolitic alluvium, or simply as rock outcrop. The ground surface is characterized by shrubs rooted in exposed gravels and soil intermixed with grass and litter patches. This mixed broadleaf and conifer riparian forest is dominated by <i>Pinus ponderosa</i> with broadleaf deciduous riparian trees such as <i>Acer negundo</i> or <i>Populus angustifolia</i> as codominants that form open to closed canopies (10-80% canopy cover). <i>Juniperus monosperma</i> or <i>Juniperus scopulorum</i> along with <i>Alnus incana ssp. tenuifolia</i> or <i>Betula occidentalis</i> can be found in the subcanopy or as understory shrubs. The shrub layer is characterized by abundant <i>Forestiera pubescens</i> with a mix of other mesic shrubs and vines such as <i>Brickellia californica, Ptelea trifoliata, Rhus trilobata, Ribes leptanthum, Robinia neomexicana, Rosa woodsii, Rubus parviflorus, Toxicodendron rydbergii</i>, and <i>Vitis arizonica</i>. The herbaceous layer is a rich assortment of mesic-trending species (26 graminoids and 35 forbs) but variable in composition and cover (5-30% total cover). Common species include facultative and obligate wetland species such as <i>Agrostis exarata, Agrostis stolonifera, Carex hystericina</i>, and <i>Juncus dudleyi</i> among graminoids, and <i>Aralia racemosa, Berula erecta, Brickellia brachyphylla, Equisetum arvense, Lobelia cardinalis, Prunella vulgaris</i>, and <i>Rudbeckia laciniata</i> among forbs. |
Comm #8433
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Atriplex canescens / Muhlenbergia porteri Shrubland
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accession code: VB.CC.31735.CEGL005385
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Western Ecology Working Group of... |
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This saltbush shrubland association is currently known from Salinas Pueblo Missions National Monument and White Sands Missile Range in New Mexico and Grand Canyon National Park in Arizona. The information below is based on data collected there and will be updated when additional inventory data are available. At Salinas Pueblo Missions, this association is reported from 1980 m (6490 feet) in elevation on a gentle, southwest-facing slope of a low hill. The substrate is derived from limestone of the Permian San Andres Formation. The ground surface is characterized by exposed soil and litter. The reported site is in close proximity to pueblo ruins, and soils appear to have been disturbed. At Grand Canyon, it occurs on fairly steep, mid and upper sideslopes at 1575 to 1625 m (5200-5300 feet) elevation, but likely also occurs outside of this elevational range. It is typically found on southeast- to southwest-facing, moderate to steep gradients (22-35°). Soils are well- to rapidly-drained silty loams. This desert shrubland is dominated by <i>Atriplex canescens</i> with a luxuriant grass understory dominated by <i>Muhlenbergia porteri</i>, which can reach 40% total cover underneath shrubs and in the intershrub spaces. At Grand Canyon, <i>Juniperus osteosperma</i> trees occasionally occur, but tall shrubs are absent. The short-shrub layer also includes <i>Ephedra fasciculata, Aloysia wrightii, Coleogyne ramosissima, Opuntia bigelovii</i>, and <i>Yucca baccata</i>. The dwarf-shrub layer is poorly-developed and is typically represented only by <i>Gutierrezia sarothrae</i> or <i>Gutierrezia microcephala</i>. <i>Bromus rubens</i> often accompanies <i>Muhlenbergia porteri</i> in the graminoid understory, while other native bunchgrasses such as <i>Achnatherum speciosum, Bouteloua curtipendula, Hesperostipa comata</i>, and <i>Tridens muticus</i> occasionally occur. At Salinas Pueblo Missions, <i>Bouteloua gracilis</i> and <i>Sporobolus contractus</i> are also common associates. A ruderal vegetation phase is indicated by the presence of <i>Erysimum capitatum, Marrubium vulgare, Phacelia integrifolia, Portulaca oleracea</i>, and <i>Solanum jamesii</i>. |
Comm #8434
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Conocarpus erectus - Rhizophora mangle - Laguncularia racemosa - Metopium toxiferum / Tillandsia spp. Woodland
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accession code: VB.CC.27040.CONOCARPUSERECT
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Southeastern Ecology Working Gro... |
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This community is a short woodland or tall shrubland community, with canopy height ranging from 2.5-8 m. Canopy closure averages 50-65% providing "an ideal habitat for most of the sun-adapted bromeliads" (Hilsenbeck et al. 1979). The canopy consists of Conocarpus erectus, Rhizophora mangle, Laguncularia racemosa, Avicennia germinans, Metopium toxiferum, Persea palustris, Sabal palmetto, and Taxodium ascendens. Epiphytes present include Tillandsia utriculata, Tillandsia X smalliana, Tillandsia balbisiana, Tillandsia fasciculata, Tillandsia paucifolia, Tillandsia flexuosa, Pleopeltis polypodioides ssp. michauxiana, Phlebodium aureum, Encyclia tampensis, and Vanilla barbellata. |
Comm #8435
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Artemisia tridentata ssp. vaseyana / Hesperostipa comata Shrubland
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accession code: VB.CC.34363.CEGL002931
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Western Ecology Working Group of... |
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This association is known from southern Utah to southern Idaho and western Wyoming and is likely to occur in northern Nevada. It occurs on moderate slopes between 1372 to 2850 m (4500-9350 feet) elevation. Soils are deep and range from clay loam to sandy loams. <i>Artemisia tridentata ssp. vaseyana</i> is the dominant shrub. <i>Purshia tridentata, Symphoricarpos oreophilus, Ericameria</i> sp., <i>Artemisia tripartita</i>, and <i>Amelanchier alnifolia</i> may be present at upper elevations, and at lower altitudes <i>Chrysothamnus viscidiflorus</i> and <i>Tetradymia canescens</i> can be common. <i>Hesperostipa comata (= Stipa comata)</i> is the principal understory species. <i>Festuca idahoensis, Pseudoroegneria spicata (= Agropyron spicatum)</i>, and <i>Koeleria macrantha</i> may be present in small amounts. Other herbaceous species that may be present include <i>Carex rossii, Achnatherum lettermanii, Achnatherum nelsonii, Pseudoroegneria spicata, Poa pratensis, Antennaria microphylla</i>, and <i>Eriogonum umbellatum</i>. |
Comm #8436
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A.708
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accession code: VB.CC.2340.A708
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EcoArt 2002 |
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Wind-sculpted scrub on summits of higher peaks in Martinique, dominated by the Martinique endemics ~Rondeletia martinicensis, Miconia martinicensis$, and others. These shrublands are associated with cloud forests. |
Comm #8437
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Pouteria sandwicensis - Bobea sandwicensis - Antidesma pulvinatum Forest
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accession code: VB.CC.24578.POUTERIASANDWIC
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Western Ecology Working Group of... |
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Comm #8438
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Cynodon dactylon Western Ruderal Herbaceous Vegetation
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accession code: VB.CC.31496.CEGL005463
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Western Ecology Working Group of... |
0
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This association is comprised of improved pastures dominated by <i>Cynodon dactylon</i>, with varying degrees of native composition remaining on a wide variety of soils and sites. It is currently only reported from Arizona in Grand Canyon National Park and Tuzigoot National Monument, but also could be found in other western states and ecoregions. Vegetation is dominated by the introduced grass <i>Cynodon dactylon</i>, with various remnant native species. Although originally planted, <i>Cynodon dactylon</i> maintains itself spontaneously and is considered weedy or "semi-natural" as opposed to cultivated. |
Comm #8439
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Zizania (aquatica, palustris) Semipermanently Flooded Herbaceous Alliance
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accession code: VB.CC.21955.ZIZANIAAQUATICA
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Midwestern Ecology Working Group... |
0
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This alliance, found in parts of the Great Lakes and St. Lawrence region of the United States and adjacent Canada, is characterized by freshwater marshes dominated by Zizania aquatica or Zizania palustris. Further work is needed to characterize this alliance. |
Comm #8440
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Tsuga heterophylla / Mahonia nervosa - Gaultheria shallon Forest
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accession code: VB.CC.27068.TSUGAHETEROPHYL
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Western Ecology Working Group of... |
0
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