Name:
Dasiphora fruticosa - Sanguisorba canadensis / Carex interior Seep Macrogroup
Reference:
NatureServe Biotics 2019
Description:
These are generally small-patch herbaceous to shrubby seepage wetlands found predominantly on circumneutral to somewhat alkaline to acidic sites, ranging from the Appalachians, Interior Low Plateau, and Ozark regions north to New England and the Midwest-Great Lakes region. North-central and northeastern seep vegetation is dominated by tall and short forbs, as well as by graminoids and <i>Sphagnum</i> mosses in some associations. Characteristic forbs include <i>Chelone</i> spp., <i>Impatiens capensis, Impatiens pallida, Rudbeckia laciniata</i>, and <i>Symplocarpus foetidus</i>; graminoids may also be present, including <i>Carex</i> spp., <i>Eriophorum virginicum</i>, and <i>Glyceria striata</i>. In the Ozarks region and Interior Plateau, characteristic herbaceous species include <i>Cardamine bulbosa, Carex interior, Carex lurida, Carex leptalea, Impatiens capensis, Parnassia grandifolia, Rudbeckia fulgida var. speciosa, Rudbeckia fulgida var. umbrosa, Scirpus atrovirens, Scirpus cyperinus, Spartina pectinata</i>, and <i>Thelypteris palustris var. pubescens</i>. Shrubs such as <i>Alnus serrulata</i> and <i>Salix</i> spp. may also occur. In the Central and Southern Appalachians, seepage fens are typically dominated by trees and shrubs. Some characteristic tree species include <i>Tsuga canadensis, Picea rubens, Acer rubrum, Nyssa sylvatica</i>, and <i>Pinus rigida</i>; some characteristic shrubs include <i>Alnus serrulata, Viburnum nudum var. cassinoides</i>, and <i>Toxicodendron vernix</i>. The habitats on which this type occurs are generally on flat to gently sloping terrain, on a variety of rock types, mostly typically limestone and dolomite, but also mafic and ultramafic igneous and metamorphic rocks, as well as less frequently acidic sedimentary rocks. Some soils are essentially a thin organic layer over limestone gravel, over a less permeable layer of more solid rock; the soil or substrate is saturated by groundwater, which may be circumneutral and of calcareous origin. To the north, the organic (peat) surface component of the substrate may be deeper than in the south. In the Central and Southern Appalachians, these sites occur at elevations below 1220 m (4000 feet) on soils which are often saturated and mucky, including in poorly drained bottomlands. Wetness results from a combination of groundwater input, seepage from adjacent slopes, rainfall and impeded drainage. In glaciated areas, examples are characteristically in pitted outwash or in kettle lakes associated with kettle-kame-moraine topography. North-central and northeastern seeps are linear, non-peaty, non-sphagnous, often rocky, groundwater slope wetlands that are embedded in an upland forest setting.
Accession Code:
urn:lsid:vegbank.org:commConcept:40480-{6FC49008-81C1-40F5-8173-6DC9846390A9}
Plot-observations of this Community Concept:
0
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