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Juncus roemerianus Tidal Herbaceous Alliance | Southeastern Ecology Working Gro...
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Name: Juncus roemerianus Tidal Herbaceous Alliance Reference: Southeastern Ecology Working Gro... Description: Juncus roemerianus-dominated marshes with tidal hydrology. Associations in this alliance have a range of water chemistry, including saline, brackish, and (rarely) freshwater. This widely distributed salt marsh alliance occurs in association with low salt marshes or in brackish marshes, and is characterized by discrete, dense patches of vegetation usually strongly dominated by Juncus roemerianus with few other associates. Associates which occur at low cover may include Borrichia frutescens, Baccharis halimifolia, Spartina alterniflora, Distichlis spicata, Schoenoplectus robustus (= Scirpus robustus), Symphyotrichum tenuifolium (= Aster tenuifolius), and Symphyotrichum subulatum (= Aster subulatus). This community may occur as isolated patches within low salt marsh, or may dominate vast areas at the heads of tidal creeks that drain the marsh. Its hydrology is generally irregularly tidally flooded. Soils of this association are generally poorly to very poorly drained, often with standing water atop peat accumulations (averaging 15 cm in depth) which in turn overlie gleyed sands. Degree of tidal inundation and relative elevation control the distribution of salt marsh vegetation in general; Juncus roemerianus is typically found at lower elevation than the associated Spartina patens marshes or mixed marshes. Juncus roemerianus generally occurs on sandy substrates. The alliance may more rarely occur in freshwater, wind tidal situations. In these examples, Juncus roemerianus is the dominant, but other characteristic species may include Thelypteris palustris var. pubescens, Polygonum punctatum, Cladium mariscus ssp. jamaicense, Asclepias lanceolata, Osmunda regalis var. spectabilis, Eleocharis fallax, Boehmeria cylindrica, and others. This species composition is indicative of the freshwater marsh conditions, as they do not occur in more brackish and saline associations in the Juncus roemerianus alliance.  Accession Code: VB.CC.18743.JUNCUSROEMERIAN Plot-observations of this Community Concept: 0
	Party Perspective according to: NatureServe (organization) Perspective from: 26-Nov-1997 to: 01-May-2019
	status: accepted This Community's Level: Alliance This Community's Children: [none]		Names:   Scientific: Juncus roemerianus Tidal Herbaceous Alliance   Translated: Black Needlerush Tidal Herbaceous Alliance   UID: HIGHER_CLASS_UNIT.2.126456 NatureServe Explorer   Code: A.1475