Name:
Nyssa aquatica - (Taxodium distichum) Semipermanently Flooded Forest Alliance
Reference:
Southeastern Ecology Working Gro...
Description:
This alliance encompasses semipermanently flooded forested riverine swamps dominated by Nyssa aquatica, with or without Taxodium distichum as a codominant. Stands of this alliance may vary in composition from ones largely dominated by Nyssa to ones dominated by a mix of Taxodium, Nyssa, and other hardwood species. Dominance of Nyssa may vary conceptually from 100-25%. Dominance of Taxodium may vary from less than 75% to absent. Other canopy and subcanopy species may include Nyssa biflora, Quercus lyrata, Carya aquatica, Fraxinus profunda, Fraxinus caroliniana, Planera aquatica, and Populus heterophylla. Shrubs and herbs are typically limited to tree bases, fallen logs, and other elevated places in the stand. Itea virginica is often the only shrub present. Herbaceous species may be absent and often are sparse. Species present can include Phanopyrum gymnocarpon (= Panicum gymnocarpon), Pluchea camphorata, Boehmeria cylindrica, Rudbeckia laciniata, Sagittaria latifolia, Onoclea sensibilis, Triadenum walteri, Carex joorii, Carex glaucescens, Proserpinaca pectinata, Asclepias perennis, Saururus cernuus, Justicia ovata, Leersia lenticularis, and others. Associations in this alliance occur in backwater sloughs, low wet flats, swales and backswamps, and along blackwater streams and other alluvial settings. Related vegetation associated with artificial lakes and millponds are accommodated in another alliance, Taxodium distichum - (Taxodium ascendens) Seasonally Flooded Lakeshore Woodland Alliance (A.652). Surface water is present throughout the growing season in most years. Forests in this alliance occur virtually throughout the Atlantic and Gulf coastal plains and the Mississippi River Alluvial Plain within the range of Nyssa aquatica, and in the Arkansas River Valley; also reported from the Mobile and Tensaw rivers in Alabama.
Accession Code:
VB.CC.19917.NYSSAAQUATICATA
Plot-observations of this Community Concept:
0
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