National Forests in Florida Final Report
Pond-cypress / (Swamp Blackgum) / Swamp Doghobble - Shining Fetterbush - Wax-myrtle Depression Forest
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- Pond-cypress / Myrtle Dahoon / (Peatland Sedge, Pinebarren Sedge) Stringer Forest
Pond-cypress / (Swamp Blackgum) / Swamp Doghobble - Shining Fetterbush - Wax-myrtle Depression ForestElement Identifiers NVCS association: Taxodium ascendens / (Nyssa biflora) / Leucothoe racemosa - Lyonia lucida - Morella cerifera Depression Forest Database Code: CEGL007420 Formation: Seasonally flooded cold-deciduous forest Alliance: TAXODIUM ASCENDENS SEASONALLY FLOODED FOREST ALLIANCE (I.B.2.N.e.21) Element Concept Summary: This forested community occurs in poorly drained to permanently wet depressions surrounded by upland or saturated wetland communities, primarily pine flatwoods, but it rarely can occur in floodplain depressions of blackwater rivers (i.e., Styx River, Baldwin County, Alabama). It occurs in peaty depressions on the Coastal Plain from North Carolina and South Carolina through Georgia, Florida, Alabama, and Mississippi to eastern Louisiana. This community occurs on acidic sand overlain by an organic layer. Size ranges from one to several hundred acres. Taxodium ascendens is the most conspicuous tree in the canopy; Pinus elliottii var. elliottii can sometimes be present or codominant. Nyssa biflora frequently occurs in the subcanopy but may occur as a canopy species. Shrubs occur on hummocks which form around cypress buttresses and knees. This stratum may be made up of one or several species of Leucothoe racemosa, Cyrilla racemiflora, Itea virginica, Lyonia lucida, Litsea aestivalis, Hypericum fasciculatum, Clethra alnifolia, Morella cerifera (= Myrica cerifera), Ilex cassine, Cephalanthus occidentalis, Persea palustris, and more. Shrubs form a distinct understory with increasing distance from the center depression. Carex spp. and Sphagnum spp. occur on the thin, peaty muck. Other ground cover is scattered on hummocks, and includes Woodwardia virginica, Saururus cernuus, and Lachnanthes caroliana. Density increases with proximity to the community's edge. Pieris phillyreifolia, an epiphytic shrub-vine may occur on the Taxodium ascendens trees, and Tillandsia usneoides, are often abundant in some parts of the range. Environment: This forested community occurs in poorly drained to permanently wet depressions surrounded by upland or saturated wetland communities, primarily pine flatwoods, but it rarely can occur in floodplain depressions of blackwater rivers (i.e., Styx River, Baldwin County, Alabama). It occurs on acidic sand overlain by an organic layer. Size ranges from one to several hundred acres (Monk and Brown 1965, Clewell 1971). Vegetation: Taxodium ascendens is the most conspicuous tree in the canopy. Nyssa biflora frequently occurs in the subcanopy (Monk and Brown 1965, Clewell 1971, 1981), but may occur as a canopy species. Shrubs occur on hummocks which form around cypress buttresses and knees. This stratum may be made up of one or several species of Leucothoe racemosa, Cyrilla racemiflora, Itea virginica, Lyonia lucida, Hypericum fasciculatum, Clethra alnifolia, Morella cerifera (= Myrica cerifera), Ilex cassine, Cephalanthus occidentalis, Persea palustris, and more. Shrubs form a distinct understory with increasing distance from the center depression (Monk and Brown 1965, Clewell 1971). Carex spp. and Sphagnum spp. occur on the thin, peaty muck. Other ground cover is scattered on hummocks, and includes Woodwardia virginica, Saururus cernuus, and Lachnanthes caroliana. Density increases with proximity to the community's edge. Pieris phillyreifolia, an epiphytic shrub-vine may occur on the Taxodium ascendens trees, and Tillandsia usneoides, are often abundant in some parts of the range. Dynamics: See Summary Similar Associations: No information Synonymy: IIA3a. Pondcypress Dome and Swamp Forest (Allard 1990) Small Depression Swamp, Mixed Subtype (Schafale pers. comm.) Comments: None Conservation Ranking & Rare Species GRank: G3 (01-01-23): This community is fairly widespread in occurrence in the East Gulf Coastal Plain, Florida Peninsula, and southern Atlantic Coastal Plain. It occurs in what were historically fire-maintained landscapes, and most occurrences nowadays have fire-suppressed conditions. Additionally, as a community which occurred in longleaf pine flatwood landscapes, this community has suffered from the extreme reduction in longleaf and associated communities. High-ranked species: LITSEA AESTIVALIS (G3) Element Distribution Range: This community occurs in peaty depressions on the Coastal Plain from North Carolina and South Carolina through Georgia, Florida, Alabama, and Mississippi to eastern Louisiana. States: AL FL GA LA MS NC SC Crosswalk to State Classifications: NC: Nonriverine Swamp Forest, in part (NC 1990) TNC Ecoregions: 53:C, 56:C, 57:C USFS Ecoregions: 232Bf:CCC, 232Ca:CCC, 232Dc:CCC Federal Lands: USFS (Apalachicola, Conecuh, Croatan?, De Soto, Francis Marion?, Ocala, Osceola) Element Sources References: Allard 1990, Clewell 1971, Clewell 1981, Monk and Brown 1965, NatureServe Ecology - Southeast U.S. unpubl. data, Schafale and Weakley 1990, Schafale pers. comm. Flatwoods – Wooded Ponds and Dome Swamps Pond-cypress / Myrtle Dahoon / (Peatland Sedge, Pinebarren Sedge) Stringer ForestElement Identifiers NVCS association: Taxodium ascendens / Ilex myrtifolia / Carex (striata, turgescens) Stringer Forest Database Code: CEGL007419 Formation: Seasonally flooded cold-deciduous forest Alliance: TAXODIUM ASCENDENS SEASONALLY FLOODED FOREST ALLIANCE (I.B.2.N.e.21) Element Concept Summary: This forested community, often known as 'cypress stringers,' occurs along small, diffuse creeks or streams, and possibly along larger rivers. Small Taxodium ascendens trees form the fairly open to dense canopy. Shrubs species present include Cyrilla racemiflora, Cliftonia monophylla, Ilex myrtifolia, Clethra alnifolia, Lyonia lucida, and Stillingia aquatica. Carex spp. and Rhynchospora spp. including Carex striata, Carex turgescens, and Rhynchospora microcephala (= Rhynchospora cephalantha var. microcephala), occur in the water and on the drier edges. Scleria baldwinii and Cladium mariscus ssp. jamaicense can be significant herbaceous components. This community occurs on the Coastal Plain from southeastern South Carolina to northern Florida, and west to southeastern Louisiana. The sandy subsoil is overlain by peat. Fire probably occurs more often here than in other Taxodium ascendens-dominated forests. Environment: See Summary Vegetation: Small Taxodium ascendens trees form the fairly open to dense canopy. Shrubs species present include Cyrilla racemiflora, Cliftonia monophylla, Ilex myrtifolia, Clethra alnifolia, Lyonia lucida, and Stillingia aquatica. Carex spp. and Rhynchospora spp., including Carex striata, Carex turgescens, and Rhynchospora microcephala (= Rhynchospora cephalantha var. microcephala), occur in the water and on the drier edges. Scleria baldwinii and Cladium mariscus ssp. jamaicense can be significant herbaceous components. An example from Apalachicola National Forest (APAL.30) had the following dominants: Taxodium ascendens, Pinus elliottii, Cliftonia monophylla, Clethra alnifolia, Nyssa ursina, Magnolia virginiana, Hypericum fasciculatum, Eriocaulon decangulare, Aristida beyrichiana, Panicum rigidulum, and Smilax laurifolia. Another Apalachicola National Forest plot (APAL.36) had these dominants: Taxodium ascendens, Nyssa biflora, Hypericum chapmanii, Ilex myrtifolia, and Cyrilla racemiflora, with Clethra alnifolia, Lyonia lucida, Rhynchospora microcephala, Pieris phillyreifolia, Cliftonia monophylla, and Smilax laurifolia. Dynamics: See Summary Similar Associations: No information Synonymy: IIA5b. Coastal Plain Small Stream Swamp Forest (Allard 1990) B. in part Strand Swamp, Cypress Strand (FNAI 1992b) B. in part Strand Swamp, Cypress Strand (FNAI 1990) B. in part Comments: None Conservation Ranking & Rare Species GRank: G3?Q (99-12-16): Although these pond cypress stringers have a large range, from the Coastal Plain of southeastern South Carolina and west to southeastern Louisiana, they are relatively rare within this landscape. They occur in narrow, shallow drainage corridors primarily in flatwoods and are vulnerable to physical damage and hydrologic changes due to silviculture, agriculture, and urban development in adjacent lands. Fires in the uplands naturally burned into and sometimes through these communities, maintaining a patchwork of graminoid and woody vegetation in the understory. Several excellent examples of this community are protected on public land; as additional data are gathered, this community may be re-ranked to be less rare. However, additional vegetation classification work is needed to determine whether this association should be divided to reflect ecoregional variation in understory species composition. Until this work is done, and until further occurrences of this community are documented, a question-mark beside the rarity ranking is warranted. High-ranked species: No information Element Distribution Range: States: AL FL GA LA MS SC? Crosswalk to State Classifications: FL: Strand Swamp, in part (FL 1992) TNC Ecoregions: 53:C, 56:C USFS Ecoregions: 232Bh:CCC, 232Ca:CCP, 232Cb:CCP, 232Cc:CCP Federal Lands: USFS (Apalachicola, Conecuh, De Soto, Ocala, Osceola); USFWS (Grand Bay) Element Sources References: Allard 1990, Clewell 1971, FNAI 1990, FNAI 1992a, FNAI 1992b Flatwoods – Wooded Ponds and Dome Swamps Directory: library library -> Strategic Plan South Sudan Country Office Context library -> The World Order of Bahá’u’lláh Selected Letters library -> Ieee/iee electronic Library (iel) library -> [0] B. Hardware [2] library -> [1] B. Hardware [1] library -> Florida public service commission library -> 1 1 before the florida public service commission 2 docket no. 070650-ei 3 In the Matter of: 4 petition to determine need for turkey point nuclear units 6 and 7 electrical 5 power plant, by florida power & light company library -> Archived Online Exhibit Download 3.16 Mb. Share with your friends:
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