Sumter National Forest Final Report - NatureServe

• Betula nigra - Platanus occidentalis Forest (CEGL002086)Related Concepts:• Brownwater Levee Forest (Birch-Sycamore Successional Phase) (Schafale 2000) ?• Eutrophic Seasonally Flooded Forest (Rawinski 1992) ?• IIA7b. River Birch - Sycamore Riverfront Forest (Allard 1990) B• Mountain Stream Floodplain Forest (Ambrose 1990a) ?• River Birch - Sycamore (72) (USFS 1988) ?• River Birch - Sycamore Riverfront Forest (Oberholster 1993) B• River Birch - Sycamore: 61 (Eyre 1980) ?• River Birch-Sycamore Riverfront Forest (Pyne 1994) ?Classification Comments: No effort has been made to subdivide this type into northern and southern, or Coastal Plain and Interiorvariants, although there are undoubtedly some floristic differences between these extremes, at least in the lower strata. This includesthe 'Sycamore - River Birch - Silver Maple' forests of the Pearl River in Louisiana mentioned by K. Ribbeck. Additional species fromthe shrub and herb strata need to be added to make more apparent the differences between this association and Betula nigra - Platanusoccidentalis Forest (CEGL002086), which is a more northern forest. In Kentucky, this association (CEGL007312) would be found onthe southern part of the Daniel Boone National Forest, in contrast to CEGL002086, which is more northern.CONSERVATION RANKING & RARE SPECIESGRank: G4G5 (2001-9-19): This is a widespread, variable, dynamic association. The principal threats to it come from hydrologicalterations, stands do not typically contain valuable timber species.High-ranked species: No informationELEMENT DISTRIBUTIONRange: This riverfront association ranges from Virginia to southern Georgia in the Piedmont and Coastal Plain (and into the southernand lower-elevation parts of the Southern Blue Ridge, excluding the highest elevations of the mountains) and west to eastern Texas,and possibly the Cumberland Plateau of northern Alabama.Subnations: AL, GA, KY, LA, MS, NC, SC, TN, TX, VATNC Ecoregions: 32:P, 40:P, 41:C, 42:C, 43:C, 44:C, 50:C, 51:C, 52:C, 53:C, 56:C, 57:C, 58:?USFS Ecoregions: 221Hc:CCC, 222Cf:CCC, 222Cg:CCC, 222E:CC, 231Cd:CPP, 231E:CC, 231Ga:CCC, 231Gb:CCC,231Gc:CCC, 232B:CC, 232C:CC, 232D:CC, 232F:CC, 234A:CC, 255:C, M221Cd:CCC, M221Dc:CCC, M231Aa:CCC,M231Ab:CCC, M231Ac:CCC, M231Ad:CCCFederal Lands: DOD (Fort Benning); NPS (Shiloh); USFS (Bankhead?, Chattahoochee, Daniel Boone, Kisatchie, Sumter); USFWS(Little River)ELEMENT SOURCESReferences: Allard 1990, Ambrose 1990a, Burns and Honkala 1990b, Campbell 1988, Campbell 1989a, Clark and Benforado 1981,Dickson and Segelquist 1978, Duever and Brinson 1984b, Evans 1991, Eyre 1980, FNAI 1992b, Faulkner and Patrick n.d., Fleminget al. 2001, Flinchum 1977, Gettman 1974, Hoagland 1997, Kartesz 1999, Klimas et al. 1981, McWilliams and Rosson 1990,NatureServe Ecology - Southeastern U.S. unpubl. data, Nelson 1986, Oberholster 1993, Palmer-Ball et al. 1988, Peet et al. unpubl.data 2002, Putnam 1951, Putnam et al. 1960, Pyne 1994, Rawinski 1992, Schafale 2000, Schafale and Weakley 1990, Smith 1996a,Southeastern Ecology Working Group n.d., USFS 1988, Wharton 1978, Wharton et al. 1982, Wieland 1994b, Wieland 2000bRIVERWEED HERBACEOUS VEGETATIONELEMENT IDENTIFIERSNVC association: Podostemum ceratophyllum Herbaceous VegetationDatabase Code: CEGL004331Formation: Permanently flooded temperate or subpolar hydromorphic-rooted vegetation (V.C.2.N.a)Alliance: Podostemum ceratophyllum Permanently Flooded Herbaceous Alliance (A.1752)ELEMENT CONCEPTSummary: This association represents essentially monospecific beds of Podostemum ceratophyllum, although some algae may alsobe present. This submersed vegetation forms a low mat or crust attached to rocks in moderately fast- to fast-flowing water. Typicalhabitat for this association in the Central Appalachians and related areas includes rocky surfaces of streambeds and riverbeds inmature drainage systems where the streams have cut down to rock and the floodplain is relatively narrow, or on dams. It tends to beassociated with higher pH streams which cut through diabase, limestone or calcareous shales.Environment: This association includes vegetation of shoals in rocky streambeds and riverbeds in mature drainage systems wherethe streams have cut down to rock, and the floodplain is relatively narrow; or on dams in moderately fast- to fast-flowing water. Ittends to be associated with higher pH streams which cut through diabase, limestone or calcareous shales. In the Piedmont region andpossibly elsewhere, the occurrence of macrophytic vegetation may be limited by unstable sediments, moderate to high gradients, andVegetation of Sumter National Forest April 30 2004Copyright © 2004 NatureServe91