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Eleocharis microcarpa - Juncus repens - Rhynchospora corniculata - (Mecardonia acuminata, Proserpinaca spp.) Marsh | NatureServe Biotics 2019
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Name: Eleocharis microcarpa - Juncus repens - Rhynchospora corniculata - (Mecardonia acuminata, Proserpinaca spp.) Marsh Reference: NatureServe Biotics 2019 Description: This herbaceous community forms the center of saturated to seasonally flooded wet depression ponds. It has been documented in the southern Eastern Highland Rim of Tennessee, but this or related vegetation could also be found in the southern Coastal Plain. The centers of these ponds are typically dominated by a combination of <i>Eleocharis microcarpa</i> and/or <i>Juncus repens</i>. <i>Rhynchospora corniculata</i> is also typically present in this zone; <i>Mecardonia acuminata</i> and/or <i>Proserpinaca</i> spp. may also be present; in some cases <i>Juncus repens</i> may exhibit heavy dominance. In at least one example, <i>Ludwigia microcarpa</i> exhibits codominance with <i>Eleocharis microcarpa</i>. Additional herbs present are <i>Ludwigia linearis, Proserpinaca palustris, Proserpinaca intermedia, Proserpinaca pectinata, Xyris laxifolia var. iridifolia</i>, and <i>Juncus effusus</i>. This vegetation may grade into that of the surrounding emergent zone, which may include <i>Carex bullata, Panicum verrucosum, Panicum rigidulum var. rigidulum, Rhynchospora glomerata</i>, and <i>Rhynchospora capitellata</i>. This adjoining zone is part of ~<i>Rhynchospora</i> spp. - <i>Panicum rigidulum - Panicum verrucosum</i> Pondshore Marsh Alliance (A1384)$$. The upland depressions where this vegetation occurs typically have a pronounced seasonal fluctuation in water level, filling in the winter and often drying completely in the summer. During some years, the deepest zone in the center of the depression may remain inundated. Examples on Arnold Air Force Base (southern Eastern Highland Rim of Coffee County, Tennessee) occur in isolated upland depressions as well as at the former airfield, where water is ponded by an impermeable substrate (the fragipan of the Guthrie silt loam soils).  Accession Code: urn:lsid:vegbank.org:commConcept:33526-{F197B75B-88E0-415B-B14C-5AD6B590D3C5} Plot-observations of this Community Concept: 0
	Party Perspective according to: NatureServe (organization) Perspective from: 01-Jul-1997 to: ongoing
	status: accepted Community's Parent: Rhynchospora careyana - Rhynchospora inundata Pondshore Marsh Alliance This Community's Level: Association This Community's Children: [none]		Names:   UID: ELEMENT_GLOBAL.2.683121 NatureServe Explorer   Code: CEGL004748   Translated: Small-fruit Spikerush - Lesser Creeping Rush - Short-bristle Horned Beaksedge - (Axil-flower, Mermaidweed species) Marsh   Common: Depression Pond (Spikerush - Creeping Rush Type)   Scientific: Eleocharis microcarpa - Juncus repens - Rhynchospora corniculata - (Mecardonia acuminata, Proserpinaca spp.) Marsh (convergence) and Synonyms: (similar) CEGL004748 (similar) Eleocharis microcarpa - Juncus repens - Rhynchospora corniculata - (Mecardonia acuminata, Proserpinaca spp.) Herbaceous Vegetation (similar) Eleocharis microcarpa - Juncus repens - Rhynchospora corniculata - (Mecardonia acuminata, Proserpinaca spp.) Herbaceous Vegetation