| Add/Drop |
Name
|
Reference
|
Plots↓
|
Description |
Comm #8631
|
Acer saccharum - Tilia americana / Staphylea trifolia / Dryopteris marginalis - (Impatiens pallida) Forest
» more details
accession code: VB.CC.30989.CEGL006471
|
Eastern Ecology Working Group of... |
0
|
This association occurs in the Central Appalachians of Pennsylvania, Maryland, northern Virginia, and probably northeastern West Virginia, extending eastward locally in the Piedmont. It is associated with steep, usually stream- or river-fronting slopes covered by rocky colluvium weathered from various calcium-bearing sedimentary, metasedimentary, and igneous bedrock, including the Sykesville metasedimentary melange, hornblende tonalite, metapyroxenite, metabasalt, mica schists, phyllite, calcareous shale, limestone, and dolomite. Substrates vary from stable, large-block boulderfields to fine talus and unstable, loose scree. Surface substrate in 16 plots averaged 15% bedrock cover and 42% cover of boulders and large rocks. North and east aspects prevail among these plots. Colluvial soils are strongly calcareous and frequently restricted to interstices among rocks but may form deeper deposits where microtopography permits. Vegetation is a rich mesophytic forest with the overstory consisting largely of <i>Tilia americana</i> (mostly <i>var. americana</i> but occasionally <i>var. heterophylla</i>), <i>Fraxinus americana</i>, and <i>Acer saccharum</i>. <i>Acer nigrum</i> is also codominant in a few localities. Minor overstory associates include <i>Carya cordiformis, Ulmus rubra, Celtis occidentalis, Quercus rubra, Liriodendron tulipifera, Quercus prinus</i>, and <i>Quercus muehlenbergii</i>. Because of frequent blowdowns and canopy gaps induced by the continuous, often unstable substrates, stands tend to be somewhat open to very open. <i>Staphylea trifolia</i> is constant and abundant in the shrub layer. Other characteristic small trees, shrubs, and vines that may achieve high cover are <i>Asimina triloba, Ostrya virginiana, Toxicodendron radicans, Parthenocissus quinquefolia</i>, and <i>Hydrangea arborescens</i>. Density of herbs varies seasonally, as well as with rock cover and available microhabitats. Spring ephemerals, especially <i>Cardamine concatenata</i> and <i>Dicentra canadensis</i>, are fairly common in most stands, while dense colonies of <i>Impatiens pallida</i> overwhelmingly dominate the late-season aspect of some stands. Other herbs that occurred in half or more of plot samples are, in descending order of constancy, <i>Dryopteris marginalis, Eurybia divaricata (= Aster divaricatus), Arisaema triphyllum, Asarum canadense, Polystichum acrostichoides, Solidago flexicaulis, Maianthemum racemosum ssp. racemosum, Hydrophyllum virginianum</i>, and <i>Actaea racemosa (= Cimicifuga racemosa)</i>. Less constant herbs that may be important locally include <i>Arabis laevigata, Cystopteris bulbifera, Pilea pumila, Polymnia canadensis, Sanguinaria canadensis, Symphyotrichum cordifolium (= Aster cordifolius)</i>, and <i>Thalictrum dioicum</i>. |
Comm #8632
|
Platanus occidentalis - Acer saccharinum - Betula nigra - Fraxinus pennsylvanica / Boehmeria cylindrica - Carex emoryi Woodland
» more details
accession code: VB.CC.37312.CEGL006476
|
Lea, C. 2003. Vegetation types i... |
0
|
This community is restricted to the Ridge and Valley and Piedmont sections of the Potomac River floodplain, where it occurs on scoured shorelines in high-gradient reaches where there is a combination of control by bedrock and alluvial processes. Stands are usually on the active channel shelf but have some aspects of depositional bars. Sites are flooded annually and inundated about 3 to 7% of the year, mostly during the dormant season, and often but probably irregularly in the early growing season. Surface substrate is variable, averaging >10% cover of bedrock and boulders in 14 plot samples. Two intergrading phases have been recognized and are described according to perceived differences in net rates of sediment erosion/accretion. In the eroding phase, the channel shelf surface is actively eroding along low channels often filled with cobbles and other coarse material, with finer soil being retained around tree bases. In the stable phase, vegetation holds finer sediments in place and provides an equilibrium between erosion and accretion. Stand physiognomy ranges from wooded herbaceous vegetation to nearly closed-canopy forest. In all expressions, some combination of <i>Platanus occidentalis, Acer saccharinum, Betula nigra</i>, and/or <i>Fraxinus pennsylvanica</i> dominate as the uppermost woody layer, which tends to be a woodland to open forest in the species-rich eroding phase and woodland or wooded herbaceous vegetation in the stable phase. Less constant species include <i>Ulmus americana, Diospyros virginiana, Juglans nigra, Quercus bicolor, Populus deltoides</i>, and <i>Salix nigra</i>. The shrub layer is absent to poorly developed, with battered individuals of <i>Cornus amomum, Cephalanthus occidentalis</i>, and <i>Salix caroliniana</i> the most frequent true shrubs. Woody vines, including <i>Toxicodendron radicans, Campsis radicans</i>, and <i>Vitis riparia</i>, are frequent. The herb layer is diverse and variable. The most constant and characteristic herbs in 14 plot samples are <i>Verbesina alternifolia, Boehmeria cylindrica, Polygonum punctatum, Eupatorium serotinum, Leersia virginica, Dichanthelium clandestinum, Carex emoryi</i> (locally abundant in large clones), <i>Ambrosia artemisiifolia, Polygonum virginianum, Teucrium canadense, Polygonum pensylvanicum, Symphyotrichum lanceolatum ssp. lanceolatum (= Aster lanceolatus var. simplex), Pilea pumila, Chasmanthium latifolium</i>, and <i>Conoclinium coelestinum (= Eupatorium coelestinum)</i>. |
Comm #8633
|
Pinus serotina - (Liriodendron tulipifera) / Lyonia lucida - Clethra alnifolia - Ilex glabra Woodland
» more details
accession code: VB.CC.21626.PINUSSEROTINALI
|
Southeastern Ecology Working Gro... |
0
|
Linear pocosins occurring along streams in the Fall-line Sandhills region of the Carolinas. |
Comm #8634
|
Salix sitchensis Shrubland
» more details
accession code: VB.CC.36442.CEGL002896
|
Titus, J. H., and J. A. Christy.... |
0
|
|
Comm #8635
|
A.1648
» more details
accession code: VB.CC.1403.A1648
NOT CURRENTLY ACCEPTED
|
EcoArt 2002 |
0
|
These communities are found on shallow deflation plains and topographic depressions of coastal dunes along the northwestern Pacific Coast of Oregon. Annual precipitation is high, falling almost entirely as rain. Temperatures are cool in summer, with abundant fog. These communities occur on the driest of the backdune deflation plain habitats, usually at the highest microelevations. Soils are seasonally moist, stabilized sands with little organic material and are generally nutrient-poor. Sand movement is typically minor, but deposition becomes more important towards the seaward margin. This alliance typically has an open ground layer of ~Lupinus littoralis$, with ~Poa macrantha$ locally codominant. Other herbaceous associates include ~Polygonum paronychia, Calystegia soldanella, Agoseris apargioides, Glehnia littoralis ssp. leiocarpa$, and ~Lathyrus littoralis$. Other herbaceous species in the deflation swales where this alliance occurs are ~Carex obnupta, Juncus falcatus$, and ~Argentina egedii ssp. egedii (= Potentilla pacifica)$ in microhabitats with a somewhat longer hydroperiod. Shrub and tree seedlings occasionally colonize moister interior stands, especially ~Gaultheria shallon$ and ~Pinus contorta$. |
Comm #8636
|
Salix hookeriana - Morella californica Shrubland
» more details
accession code: VB.CC.20986.SALIXHOOKERIANA
|
Western Ecology Working Group of... |
0
|
|
Comm #8637
|
Coccoloba uvifera - Thespesia populnea Shrubland
» more details
accession code: urn:lsid:vegbank.org:commConcept:33619-{F7E603A8-CF06-4691-9B19-D667FFE681E3}
|
NatureServe Biotics 2019 |
0
|
|
Comm #8638
|
Colubrina spp. Shrubland
» more details
accession code: urn:lsid:vegbank.org:commConcept:33620-{405A0543-A0CC-430B-B7CD-C722467FFD90}
|
NatureServe Biotics 2019 |
0
|
|
Comm #8639
|
Croton lucidus Shrubland
» more details
accession code: urn:lsid:vegbank.org:commConcept:33621-{2BDF95C1-615D-46C3-BFFB-F0B4FF95ED47}
|
NatureServe Biotics 2019 |
0
|
|
Comm #8640
|
Populus deltoides - Platanus occidentalis Forest
» more details
accession code: VB.CC.36842.CEGL002095
|
Midwestern Ecology Working Group... |
0
|
This cottonwood - sycamore floodplain forest is found in the central Great Plains of the United States. Stands occur on nearly level to undulating soils on floodplains along major rivers and streams. Soils are deep, poorly drained to well-drained, and formed in silty and clayey alluvium. The vegetation structure is open- to closed-canopy forest. Dominant trees include <i>Populus deltoides</i> and <i>Platanus occidentalis</i>. Associates include <i>Acer negundo, Carya illinoinensis, Celtis occidentalis</i>, and <i>Salix nigra</i>. |
add all query results to datacart,
add plots on page to datacart,
drop plots on page from datacart