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Reference
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Description |
Comm #11611
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Quercus macrocarpa - Quercus bicolor - (Celtis occidentalis) Woodland
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accession code: VB.CC.36809.CEGL002140
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Midwestern Ecology Working Group... |
0
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This bur oak - swamp white oak woodland community is found in the midwestern United States. Stands occur on river floodplain terraces. Soils associated with this type are silt loam, with neutral pH. The soil profile has a black A horizon to 95 cm deep, is high in organic matter, has moderate permeability, and is very high in available water capacity. This community contains large-diameter stems (>90 cm dbh) of <i>Quercus macrocarpa</i>, with scattered <i>Quercus bicolor</i> and <i>Celtis occidentalis</i>. Lower terraces of this community can contain subdominants such as <i>Gleditsia triacanthos, Platanus occidentalis</i>, and <i>Ulmus americana</i>, while higher terraces can contain subdominants such as <i>Juglans nigra, Ulmus americana</i>, and <i>Ulmus rubra</i>. <i>Euonymus atropurpureus</i> is a common understory shrub. The ground layer is dominated by <i>Elymus virginicus</i> and <i>Laportea canadensis</i>. |
Comm #11612
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CEGL007105
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accession code: VB.CC.6975.CEGL007105
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EcoArt 2002 |
0
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Comm #11613
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CEGL007108
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accession code: VB.CC.6976.CEGL007108
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EcoArt 2002 |
0
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Comm #11614
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Panicum obtusum Herbaceous Vegetation
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accession code: VB.CC.32073.CEGL002708
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Western Ecology Working Group of... |
0
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This herbaceous association is found in New Mexico and Texas. It is currently only described from Lake Meredith National Recreation Area in Texas. Additional global information will be added as it becomes available. The composition and structure of this community are influenced by climate, soils (texture, depth, and overflow), slope, natural fire and grazing pressure. It occurs on broad, gently sloping overflow sites along major drainages. The soils are deep, medium- to moderately fine-textured with moderately high fertility. Infiltration is moderately rapid and runoff is moderate. The soils are formed from colluvial deposits and are considered uplands, although overflow can occasionally occur. The productive capacity is greater than the adjoining upland communities due to receiving extra runoff from surrounding upland sites. Natural fire helped to shape the natural plant community and probably occurred every 8 to 10 years in presettlement times. This community is attractive to domestic grazing animals and has been subject to overgrazing in past decades. This grassland is dominated by <i>Panicum obtusum</i>. There are several other species of grass occurring in lesser amounts, including <i>Pascopyrum smithii, Sporobolus compositus var. compositus (= Sporobolus asper var. hookeri), Bouteloua curtipendula</i>, and <i>Bothriochloa laguroides</i>. Forbs are variable in composition depending on moisture conditions. The major species include <i>Solanum elaeagnifolium, Ambrosia psilostachya, Centaurea americana, Grindelia papposa (= Prionopsis ciliata), Gaura villosa</i>, and <i>Sphaeralcea angustifolia</i>. There are usually few shrubs present. <i>Prosopis glandulosa</i> occurs but is usually sparse. Cacti are rare, although <i>Opuntia phaeacantha</i> and <i>Opuntia macrorhiza</i> are both present. Trees are rare except for occasional <i>Celtis laevigata var. reticulata (= Celtis reticulata)</i>. |
Comm #11615
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Wolffia (borealis, columbiana) Herbaceous Vegetation
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accession code: VB.CC.32605.CEGL003311
NOT CURRENTLY ACCEPTED
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Western Ecology Working Group of... |
0
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Comm #11616
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Quercus muehlenbergii - Quercus macrocarpa / Andropogon gerardii Ravine Woodland
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accession code: VB.CC.36777.CEGL002145
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Midwestern Ecology Working Group... |
0
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This chinquapin oak - bur oak woodland community is found in the central tallgrass prairie region of the United States. Stands occur in dry-mesic ravines and valleys of rivers and major streams. This wooded community is found in a landscape that is primarily prairie. The canopy is not completely closed; it is thought to range from 25-80% cover. The tree layer is dominated by <i>Quercus muehlenbergii</i> and <i>Quercus macrocarpa</i>. <i>Cercis canadensis</i> and <i>Ulmus</i> spp. are common associates. There is usually a prominent shrub layer. The two most common shrubs are <i>Cornus drummondii</i> and <i>Symphoricarpos orbiculatus</i>. <i>Celtis occidentalis</i> and <i>Ulmus</i> spp. are often in the shrub layer, especially on sites that have not been burned recently. Herbaceous dominants include <i>Schizachyrium scoparium</i> and <i>Panicum virgatum</i>. Periodic fire is necessary to maintain the relatively open, woodland character. In the absence of fire this community soon begins to succeed to other, more closed forest types. |
Comm #11617
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I.A.5.N.c
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accession code: VB.CC.665.IA5NC
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EcoArt 2002 |
0
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Comm #11618
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CEGL001377
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accession code: VB.CC.3961.CEGL001377
NOT CURRENTLY ACCEPTED
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EcoArt 2002 |
0
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Comm #11619
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Populus deltoides / Juniperus scopulorum Woodland
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accession code: VB.CC.36833.CEGL002152
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Midwestern Ecology Working Group... |
0
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This cottonwood community is found in riparian areas of the northwestern Great Plains. Stands occur on broad, flat floodplain terraces of rivers and streams. Soils vary from silty loams to sandy alluvial deposits. The vegetation consists of an open-canopied tree layer. The dominant species is mature <i>Populus deltoides</i>. <i>Juniperus scopulorum, Juniperus virginiana</i>, or a hybrid, may contribute significant cover to both tree and sapling layer. <i>Fraxinus pennsylvanica</i> may be present as small trees, or, more commonly, as saplings. <i>Populus deltoides</i> reproduction is very limited. This community is a seral stage which, without significant disturbance, will eventually change into a <i>Fraxinus pennsylvanica</i>-dominated system. It may represent an invasive stage in ~<i>Populus deltoides - Fraxinus pennsylvanica</i> Forest (CEGL000658)$$, where <i>Juniperus</i> invades in the absence of a natural flooding regime. The shrub layer of this community is composed chiefly of <i>Rosa woodsii, Symphoricarpos occidentalis</i>, and small <i>Juniperus scopulorum</i>. The herbaceous stratum typically contains <i>Elymus canadensis, Melilotus officinalis</i>, and <i>Thalictrum dasycarpum</i>. |
Comm #11620
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CEGL002318
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accession code: VB.CC.4822.CEGL002318
NOT CURRENTLY ACCEPTED
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EcoArt 2002 |
0
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