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Taxodium ascendens / Aristida palustris Swamp Woodland
Translated Name: Pond-cypress / Longleaf Three-awn Swamp Woodland
Common Name: Atlantic Coastal Plain Pond-cypress Depression (Longleaf Three-awn Type)
Unique Identifier: CEGL004090
Classification Approach: International Vegetation Classification (IVC)
Summary: This depression woodland is found in Carolina bays and swales in coastal South Carolina. Taxodium ascendens, and at a times Pinus serotina, sparsely populate these meadows. Aristida palustris, Andropogon spp. (Andropogon capillipes, Andropogon glaucopsis, Andropogon virginicus), and Panicum rigidulum var. combsii dominate the herb layer. Amphicarpum muehlenbergianum, Panicum verrucosum, and Rhynchospora careyana are also common graminoids in this type. At times an outer zone of this type may be present and exhibit a hybrid habitat between the pond-cypress and longleaf pine wet savannas. Sarracenia flava is common to these drawdown zones.



Classification

Classification Confidence: Moderate

Vegetation Hierarchy
Class 1 - Forest & Woodland
Subclass 1.B - Temperate & Boreal Forest & Woodland
Formation 1.B.3 - Temperate Flooded & Swamp Forest
Division 1.B.3.Nb - Southeastern North American Flooded & Swamp Forest
Macrogroup Pond-cypress Basin Swamp
Group Pond-cypress Basin Swamp
Alliance Pond-cypress Depression Swamp Forest

This is the revised vegetation hierarchy. For more information see Classification Sources and usnvc.org.

Similar Associations
Unique Identifier Name
CEGL004087 Taxodium ascendens / Carex striata - Iris tridentata - (Woodwardia virginica) Swamp Woodland
CEGL004089 Taxodium ascendens - Nyssa biflora / Carex striata - Rhynchospora (careyana, cephalantha) Stringer Swamp Woodland
CEGL004100 Panicum virgatum - Andropogon (capillipes, glaucopsis) - Aristida palustris Marsh



Related Concepts from Other Classifications

Other Related Concepts
Related Concept Name: Taxodium ascendens / Aristida palustris Depression Woodland
Relationship: ? - Undetermined
Reference: Glitzenstein, J. S., and D. R. Streng. 2004. Evaluating the NatureServe preliminary plant community classification for Francis Marion National Forest. Tall Timbers Research Station, Tallahassee, FL. Plus appendices and data.

Ecological Systems Placement

Ecological Systems Placement
Ecological System Unique ID Ecological System Name
CES203.251 Southern Coastal Plain Nonriverine Cypress Dome
CES203.262 Southern Atlantic Coastal Plain Depression Pond


NatureServe Conservation Status
Global Status: G2G3 (08Jan2007)
Rounded Global Status: G2 - Imperiled
Reasons: This community is restricted to Carolina bays and swales (e.g., in the Francis Marion National Forest, South Carolina), which have had a frequent burn regime and minimal alterations to the hydrology. This association requires a burn regime of less than five years (possibly less than three) to maintain itself over time. Anthropogenic alteration of a depression's hydrology may upset this natural periodicity and result in a shift in vegetation type.

Distribution
Color legend for Distribution Map
United States Distribution: GApotentially occurs, SC
Global Distribution: United States
Global Range: This association is found in coastal South Carolina and possibly in coastal Georgia.

U.S. Forest Service Ecoregions
Domain Name: Humid Temperate Domain
Division Name: Subtropical Division
Province Name: Outer Coastal Plain Mixed Forest Province
Province Code: 232 Occurrence Status: Confident or certain
Section Name: Atlantic Coastal Flatwoods Section
Section Code: 232C Occurrence Status: Confident or certain


Vegetation

Vegetation Summary: Taxodium ascendens dominates the canopy with Pinus serotina, Nyssa biflora, Acer rubrum, and Pinus palustris occurring infrequently. Occasionally a shrub layer of Lyonia lucida, Persea palustris, Magnolia virginiana, Cyrilla racemiflora, Clethra alnifolia, Ilex spp. (Ilex cassine, Ilex glabra, Ilex myrtifolia), and/or Smilax spp. (Smilax laurifolia, Smilax walteri) will be found in sites where fire activity has been inhibited. More commonly Hypericum fasciculatum will occur as a low shrub under frequent burn regimes. Aristida palustris, Andropogon spp. (Andropogon capillipes, Andropogon glaucopsis, Andropogon virginicus), and Panicum rigidulum var. combsii dominate with Amphicarpum muehlenbergianum, Panicum verrucosum, Scleria muehlenbergii, Paspalum praecox, and Rhynchospora careyana. Common forbs include Centella erecta, Iris tridentata, Eriocaulon spp. (Eriocaulon compressum, Eriocaulon decangulare), and Rhexia aristosa.

Vegetation Composition (incomplete)
Species Name Rounded Global Status Growth Form Stratum Charact-
eristic
Dominant Constant
Cover Class %
Con-
stancy
%
Taxodium ascendens G2 Needle-leaved tree Tree canopy  
 
 
Hypericum fasciculatum G2 Broad-leaved evergreen shrub Short shrub/sapling    
 
 
Aristida palustris G2 Graminoid Herb (field)    
 
 


Environmental Setting

Wetland Indicator: Y
Environmental Summary: This community has been found in Carolina bays and swales of the Francis Marion National Forest, South Carolina, which have had a frequent burn regime and minimal alterations to the hydrology. Clay substrate may also be more common across this type.


Dynamic Processes

Dynamics: This association requires a burn regime of less than five years (possibly less than three) to maintain itself over time. Natural fluctuations in burn frequency and intensity and annual precipitation result in corresponding fluctuations in plant composition from year to year. Anthropogenic alteration of a depression's hydrology may upset this natural periodicity and result in a shift in vegetation type.


Plot Sampling & Classification Analysis

Plots stored in VegBank


Authors/Contributors
Concept Author(s): J. Gramling after Glitzenstein and Streng
Element Description Edition Date: 21Apr2004
Element Description Author(s): M. Pyne
NatureServe Conservation Status Factors Edition Date: 22Feb2007
NatureServe Conservation Status Factors Author(s): M. Pyne and C. Nordman

Ecological data developed by NatureServe and its network of natural heritage programs (see Local Programs) and other contributors and cooperators (see Sources).


References
  • Glitzenstein, J. S., and D. R. Streng. 2004. Evaluating the NatureServe preliminary plant community classification for Francis Marion National Forest. Tall Timbers Research Station, Tallahassee, FL. Plus appendices and data.

  • Southeastern Ecology Working Group of NatureServe. No date. International Ecological Classification Standard: International Vegetation Classification. Terrestrial Vegetation. NatureServe, Durham, NC.


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