Name:
Alnus (incana ssp. rugosa, serrulata) - Cornus amomum Tidal Shrub Swamp
Reference:
NatureServe Biotics 2019
Description:
This type comprises tidal freshwater, or perhaps also oligohaline, shrublands dominated by <i>Alnus serrulata</i> and/or <i>Alnus incana ssp. rugosa</i>. It is found in coastal areas with tidally-influenced river systems in the North Atlantic. Floodwaters are typically slightly acidic (pH less than 5) and soils are usually mineral without significant peat deposits. In some examples one or both of these may be characteristically dominant or nearly so. Other examples may be more semi-open with a mixed canopy of <i>Alnus</i> with other shrubs such as <i>Cornus amomum, Rosa palustris, Ilex verticillata, Viburnum dentatum, Clethra alnifolia</i>, and <i>Lindera benzoin</i>. Other woody plants which may be present include <i>Sambucus nigra ssp. canadensis, Salix</i> spp., <i>Amorpha fruticosa, Cephalanthus occidentalis, Decodon verticillatus, Toxicodendron vernix</i>, and <i>Toxicodendron radicans</i>. More northern examples may contain <i>Viburnum recognitum</i> and <i>Spiraea alba var. latifolia</i>. Some shrub associates include <i>Decodon verticillatus</i> and <i>Toxicodendron vernix</i>; some herbaceous associates are <i>Osmunda regalis var. spectabilis, Thelypteris palustris var. pubescens, Galium</i> spp., <i>Onoclea sensibilis, Polygonum punctatum, Apios americana, Typha latifolia, Peltandra virginica, Pontederia cordata, Mikania scandens, Symphyotrichum novi-belgii, Boehmeria cylindrica, Impatiens capensis, Triadenum walteri, Asclepias incarnata, Carex atlantica ssp. atlantica, Platanthera clavellata</i>, and <i>Xyris torta</i>. <i>Carex stricta</i> may also be present, and there is a great deal of micro-relief (tussocks and furrows) leading to high species diversity.
Accession Code:
urn:lsid:vegbank.org:commConcept:34983-{42975631-2BD8-4930-AE38-F2071C1891B0}
Plot-observations of this Community Concept:
5
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