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Reference
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Description |
Comm #3071
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Pinus attenuata / Arctostaphylos viscida Woodland
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accession code: urn:lsid:vegbank.org:commConcept:36671-{4F1695CA-0F59-43F5-9E94-6BDB90E5F59F}
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NatureServe Biotics 2019 |
3
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This woodland association is currently only known from Yosemite National Park in California, and the following description is based on occurrences there. Additional information will be added as it becomes available. Stands of this woodland are found at xeric to dry-mesic sites at low elevations (880-1190 m [2900-3900 feet]) on the upper slopes and ridgetops of variable but mostly southeast- to west-facing, gentle to somewhat steep slopes. The shapes of slopes are highly variable. Soils are moderately developed to well-developed with textures ranging from silt loam to clay loam from metamorphic and granitic parent material. Soils are moderately well-drained to well-drained. Litter cover is 70-80%. Disturbance levels can be low to high and include competition from exotics, road/trail construction, and vandalism/litter. Fire is also a common disturbance. This association is dominated by an open layer of <i>Pinus attenuata</i> in the overstory with an often dense understory shrub layer dominated by <i>Arctostaphylos viscida</i>. Often found in the shrub layer are <i>Adenostoma fasciculatum</i> and <i>Chamaebatia foliolosa</i>. Where <i>Arctostaphylos viscida</i> is more open, <i>Chamaebatia foliolosa</i> often becomes an extensive ground cover. Occasionally, present are <i>Pinus ponderosa, Quercus kelloggii, Vulpia myuros</i>, and <i>Arctostaphylos mewukka</i>. Other species that may contribute to cover include <i>Quercus douglasii, Toxicodendron diversilobum, Ceanothus cuneatus, Dichelostemma capitatum, Sanicula bipinnata</i>, and <i>Filago</i> sp. Locally, the ridgetop locations for this association suggest relatively intense fires of moderate frequency are necessary for its maintenance. |
Comm #3072
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Pinus jeffreyi - Pinus monophylla Woodland
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accession code: urn:lsid:vegbank.org:commConcept:36677-{65CF3BE5-0108-41AE-B4F9-0E137BDF9743}
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NatureServe Biotics 2019 |
3
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This woodland association is currently only known from Yosemite National Park in California, and the following description is based on occurrences there. Additional information will be added as it becomes available. elevations range from 2130 to 2350 m (7000-7700 feet), and aspects are eastern. This association is found in low to middle slope positions, primarily near intermittent creeks. Soils are well-drained loamy sands derived primarily from volcanic, granitic or metamorphic parent materials. Bare soil ranges from 20-75%. Sites are upland or riparian. This association is characterized by tree cover of up to 60% in the 35-50 m height class, although most stands have a lower canopy cover and height. It is dominated by <i>Pinus jeffreyi</i> and <i>Pinus monophylla</i>. The shrub layer ranges between 15-25% and is dominated by <i>Artemisia tridentata</i>. <i>Purshia tridentata</i> is also present, in lower amounts. The herb layer averages 5% cover, with <i>Bromus tectorum</i> and <i>Elymus elymoides</i> being the most frequent species. |
Comm #3073
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Pinus jeffreyi - Abies lowiana / Symphoricarpos rotundifolius / Elymus elymoides Woodland
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accession code: urn:lsid:vegbank.org:commConcept:36679-{E52E5D5D-E494-4400-BC4E-94D2FD5C314B}
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NatureServe Biotics 2019 |
3
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This woodland association is currently only known from Yosemite National Park in California, and the following description is based on occurrences there. Additional information will be added as it becomes available. Elevations range from 2380 to 2620 m (7800-8600 feet), and aspects and slopes are variable. This association is found primarily in low slope positions; one plot was on the edge of a lake. Soil drainage is variable, and texture is either loamy sand or sandy loam. Soils are derived from granite. Litter/duff cover ranges from 60 to 90%. Sites are upland. <i>Pinus jeffreyi</i> is the dominant canopy tree. <i>Abies lowiana</i> is not always present in the tree layer, but sometimes only occurs in the shrub layer. Trees range from 5-50 m in height. <i>Symphoricarpos rotundifolius</i> and <i>Artemisia tridentata</i> are the most frequent shrub species,. <i>Elymus elymoides</i> is the only constant species in the herb layer. Other herbaceous species include <i>Lupinus argenteus, Arabis bodiensis, Bromus carinatus, Poa wheeleri, Poa secunda</i>, and <i>Poa pratensis</i>. |
Comm #3074
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Artemisia rothrockii / Monardella odoratissima Shrubland
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accession code: urn:lsid:vegbank.org:commConcept:36693-{B63A2807-14AD-4E32-B00F-833DCC89AAA9}
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NatureServe Biotics 2019 |
3
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This shrubland association is currently only known from Yosemite National Park in California, and the following description is based on occurrences there. Additional information will be added as it becomes available. Stands of this vegetation are found between 2650 and 3110 m (8700-10,200 feet) of elevation on varied slopes and aspects, but largely southerly facing. Stands are near seeps or streams with perennial moisture. Soils are gravelly silt loams to loamy sands, and often carbonate-rich. This dwarf-shrubland is heavily dominated by <i>Artemisia rothrockii</i>. The only shrubs which co-occur in this association are <i>Symphoricarpos rotundifolius, Ribes montigenum</i>, and <i>Holodiscus discolor</i>. Graminoids dominate the open herbaceous layer, and species composition may be highly variable among stands. <i>Carex filifolia, Danthonia intermedia</i>, and/or <i>Poa wheeleri</i> are the most common graminoid associates. Forbs only total a small amount of cover in this association, typified by the diagnostic forb <i>Monardella odoratissima</i>. Other forbs which are often present, at very low cover values, may include <i>Antennaria rosea, Penstemon rydbergii, Juncus</i> sp., and/or <i>Horkelia fusca</i>. Twenty-five other species have been recorded on plots of this association, but none achieve more than 30% constancy. The forb <i>Castilleja miniata</i> and the graminoid <i>Poa wheeleri</i> each achieve 5% cover in 30% of plots. All other recorded species (mostly graminoids) only contribute a trace to the overall cover. |
Comm #3075
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Malacothamnus fasciculatus - Malacothamnus spp. Scrub Alliance
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accession code: urn:lsid:vegbank.org:commConcept:38382-{383A9AC5-5CFC-4C3D-84BF-DE295ED74F79}
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NatureServe Biotics 2019 |
3
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This shrubland alliance includes stands dominated by <i>Malacothamnus aboriginum, Malacothamnus densiflorus, Malacothamnus fasciculatus</i>, and/or <i>Malacothamnus fremontii</i> in post-fire settings. Stands occur in central to southern California below 700 m (2300 feet) in elevation on gentle to steep hillslopes. Soils are rocky gravels to loams and mineral clays. Stands of these shrubs have developed from many types of chaparral and coastal sage scrub after recent fires. The shrubs quickly form a seedbank in soil and duff within the first year of germination and die-off within 10-15 years after fire. |
Comm #3076
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Gutierrezia sarothrae - Gutierrezia microcephala Dwarf-shrubland Alliance
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accession code: urn:lsid:vegbank.org:commConcept:38490-{C114F129-C6FD-4CFA-8DE5-4A23AFE4C18D}
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NatureServe Biotics 2019 |
3
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The vegetation is characterized by an open (10-30% cover) woody layer dominated by <i>Gutierrezia sarothrae</i> with a sparse to luxuriant perennial graminoid layer. <i>Atriplex canescens</i> and <i>Krascheninnikovia lanata</i> may codominate the shrub layer in some stands. Other shrub associates may include <i>Artemisia tridentata, Ephedra viridis, Eriogonum corymbosum, Ericameria nauseosa, Fallugia paradoxa, Isocoma drummondii</i>, and <i>Opuntia</i> spp. Trees are absent or represented by scattered individuals of <i>Juniperus monosperma</i> or <i>Pinus edulis</i>, mostly as seedlings or saplings. The most common dominant graminoids include <i>Bouteloua gracilis, Bouteloua eriopoda, Elymus elymoides, Pleuraphis jamesii</i>, and <i>Sporobolus airoides</i>. Other herbaceous associates include <i>Aristida purpurea, Hesperostipa comata, Muhlenbergia porteri, Pleuraphis rigida, Sphaeralcea coccinea</i>, and <i>Sporobolus cryptandrus</i>. Introduced species such as <i>Bromus tectorum</i> or <i>Salsola kali</i> may dominate the herbaceous layer of some disturbed stands. This alliance represents shrub and shrub herbaceous vegetation of the Colorado Plateau and southern Rocky Mountains. It most commonly occurs on level to gently sloping sites, including gently rolling mesatops, terraces, hillslopes, plateaus, sand deposits, bluffs and occasionally along canyon footslopes on sites with moderate solar exposure. Elevation ranges from 1300 to 2230 m. |
Comm #3077
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Pennisetum setaceum - Pennisetum ciliare Ruderal Grassland Alliance
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accession code: urn:lsid:vegbank.org:commConcept:39083-{A7BA9109-D58D-41EA-86CD-4698E162B873}
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NatureServe Biotics 2019 |
3
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This alliance consists of grasslands where <i>Pennisetum setaceum</i> and/or <i>Pennisetum ciliare</i> or other <i>Pennisetum</i> species are dominant or codominant with other non-native species in the herbaceous layer. Herbs are <3 m tall, and the canopy is open to intermittent. Emergent shrub and tree layers may occur at low cover. <i>Pennisetum setaceum</i> and especially <i>Pennisetum ciliare</i> are adapted to fire and increase following burns, contributing to their spread. Both grasses establish better than native plants after a fire, and as stands age, they raise fuel loads. This alliance occurs in California at elevations ranging from sea level to 35 m. Habitats are steep coastal cliffs, bluffs, road-cuts, coastal dunes, coastal scrub, and desert scrub in areas with mild, frost-free winters. |
Comm #3078
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Arctostaphylos glauca Chaparral Alliance
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accession code: urn:lsid:vegbank.org:commConcept:39076-{8E202F29-BEEE-4E5E-AB02-63125E4F0C3D}
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NatureServe Biotics 2019 |
3
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This shrubland alliance is dominated by <i>Arctostaphylos glauca</i>. Other shrubs present may include <i>Adenostoma fasciculatum, Arctostaphylos glandulosa, Ceanothus cuneatus, Ceanothus leucodermis, Cercocarpus montanus var. glaber, Quercus berberidifolia, Rhamnus ilicifolia, Salvia mellifera</i>, and <i>Hesperoyucca whipplei</i>. Emergent trees may include <i>Quercus wislizeni</i> and <i>Quercus dumosa</i>. The herbaceous layer is sparse to well-developed, including a variety of native species such as <i>Camissonia</i> spp., <i>Galium</i> spp., <i>Marah macrocarpus, Melica</i> spp., and <i>Phacelia</i> spp. Stands occur on coarse, thin soils in portions of central and southern California and Baja California, Mexico, where temperatures are moderated by coastal influence. The summers are dry and warm, with high temperatures over 90°F being fairly common. The winters are cool and moist, although they are decidedly drier than the coastal regions north of San Francisco. Yearly rainfall totals average about 35 cm, with the bulk falling between November and April. |
Comm #3079
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Abies concolor / Symphoricarpos oreophilus Forest
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accession code: urn:lsid:vegbank.org:commConcept:29172-{08CF211E-9AFA-4B63-A952-D27249C55CAE}
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NatureServe Biotics 2019 |
3
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This forest association has been reported from mountains in Colorado, Utah, New Mexico and Arizona along the Mogollon Rim. Elevation ranges from 2075-3200 m (6800-10,500 feet). Stands are found on cool, dry sites often occurring on moderate to steep mid slopes with northern aspects, but they also occur on southern and western slopes at the higher elevations. Parent material often is limestone and Tertiary sandstone. Soil surface textures are sandy loam to loam and contain little gravel. The upper tree canopy is typically dominated by either <i>Pinus ponderosa</i> or <i>Pseudotsuga menziesii</i> with scattered <i>Abies concolor</i>. This association is characterized by the presence of successfully reproducing <i>Abies concolor</i>, which may also dominate or codominate the tree canopy or shrub layers. Associated trees include <i>Pinus flexilis, Populus angustifolia</i>, and <i>Populus tremuloides</i>. The sparse to moderately dense short-shrub layer is characteristically dominated by <i>Symphoricarpos oreophilus</i> often with <i>Rosa woodsii, Amelanchier alnifolia</i>, or several other shrubs present. The herbaceous layer is sparse. Common graminoids are <i>Carex rossii</i> and <i>Poa fendleriana</i>. Forbs are noticeably sparse. |
Comm #3080
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Quercus kelloggii – Pinus coulteri / Arctostaphylos glandulosa Association
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accession code: urn:lsid:vegtwig.vegbank.org:commconcept:424-{3B978B00-80E9-4597-AC3B-C9FC986A68C8}
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MCV2 |
3
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71.010.33 |
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