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CEGL007926 Fraxinus pennsylvanica - (Carya aquatica) / Forestiera acuminata / Phanopyrum gymnocarpon Wet Floodplain Forest
Type Concept Sentence: No Data Available
Common (Translated Scientific) Name: Green Ash - (Water Hickory) / Eastern Swamp-privet / Savanna Panicgrass Wet Floodplain Forest
Colloquial Name: Columbia Bottomlands Ash Flat
Hierarchy Level: Association
Type Concept: This community occupies shallow depressions on Vertisols that exhibit strong gilgai microtopography. The soils formed over Holocene alluvium and are located in the present-day drainage basins of Caney Creek and the Colorado, San Bernard, and Brazos rivers in the Outer Coastal Plain of Texas. It also occurs as a fringe around larger depressions in the same area. The dominant overstory species is Fraxinus pennsylvanica which forms a slightly open canopy; Carya aquatica is usually present and may codominate the overstory in some occurrences. The sparse to locally dense understory provides an open aspect, with understory dominants including Sabal minor, Forestiera acuminata and Cephalanthus occidentalis. Ground cover vegetation may be banded along moisture and microtopographic contours; it is generally dense and continuous, but the deepest parts can be devoid of vegetation during dry seasons, exposing bare, cracked, fine-textured soil. It depends on seasonal inundation due to local rainfall events to maintain moist habitat conditions. Phanopyrum gymnocarpon is the visual dominant of the ground cover. Other ground cover components include Hygrophila lacustris, Carex lupuliformis, Carex crus-corvi, Echinodorus cordifolius, Berchemia scandens, Polygonum virginianum, Rhynchospora corniculata, Saururus cernuus, and Mikania scandens. It is a conspicuous part of forest vegetation in the Columbia Bottomlands area of Brazoria, Fort Bend and Wharton counties, Texas, where it occurs intermixed with ~Quercus virginiana / Ilex vomitoria - Sabal minor / Carex cherokeensis - Malvaviscus arboreus var. drummondii Forest (CEGL007830)$$ and ~Ulmus crassifolia - Carya illinoinensis - Celtis laevigata / Chasmanthium sessiliflorum - Carex cherokeensis Floodplain Forest (CEGL002388)$$.
Diagnostic Characteristics: No Data Available
Rationale for Nominal Species or Physiognomic Features: No Data Available
Classification Comments: Concept and distribution of this association as it relates to the surrounding landscape needs further assessment.
Similar NVC Types: No Data Available
note: No Data Available
Physiognomy and Structure: No Data Available
Floristics: The dominant overstory species is Fraxinus pennsylvanica which forms a slightly open canopy; Carya aquatica is usually present and may codominate the overstory in some occurrences. The sparse to locally dense understory provides an open aspect, with understory dominants including Sabal minor, Forestiera acuminata, and Cephalanthus occidentalis. Ground cover vegetation may be banded along moisture and microtopographic contours; it is generally dense and continuous, but the deepest parts can be devoid of vegetation during dry seasons, exposing bare, cracked, fine-textured soil. It depends on seasonal inundation due to local rainfall events to maintain moist habitat conditions. Phanopyrum gymnocarpon is the visual dominant of the ground cover. Other ground cover components include Hygrophila lacustris, Carex lupuliformis, Carex crus-corvi, Echinodorus cordifolius, Berchemia scandens, Polygonum virginianum, Rhynchospora corniculata, Saururus cernuus, and Mikania scandens.
Dynamics: No Data Available
Environmental Description: This community occupies shallow depressions on Vertisols that exhibit strong gilgai microtopography. The soils formed over Holocene alluvium and are located in the present-day drainage basins of Caney Creek and the Colorado, San Bernard, and Brazos rivers in the Outer Coastal Plain of Texas. It also occurs as a fringe around larger depressions in the same area.
Geographic Range: This forest occurs in southeastern Texas.
Nations: US
States/Provinces: TX
Plot Analysis Summary:
http://vegbank.org/natureserve/ELEMENT_GLOBAL.2.689129
Confidence Level: Low - Poorly Documented
Confidence Level Comments: No Data Available
Grank: G2?
Greasons: No Data Available
| Type | Name | Database Code | Classification Code |
|---|---|---|---|
| Class | 1 Forest & Woodland Class | C01 | 1 |
| Subclass | 1.B Temperate & Boreal Forest & Woodland Subclass | S15 | 1.B |
| Formation | 1.B.3 Temperate Flooded & Swamp Forest Formation | F026 | 1.B.3 |
| Division | 1.B.3.Nb Southeastern North American Flooded & Swamp Forest Division | D062 | 1.B.3.Nb |
| Macrogroup | 1.B.3.Nb.4 Swamp Chestnut Oak - Bald-cypress - Pecan Southern Floodplain Forest Macrogroup | M031 | 1.B.3.Nb.4 |
| Group | 1.B.3.Nb.4.b Green Ash - American Elm - Black Willow Floodplain Forest Group | G759 | 1.B.3.Nb.4.b |
| Alliance | A3709 American Elm - Cedar Elm - Sugarberry West Gulf Coastal Plain Floodplain Forest Alliance | A3709 | 1.B.3.Nb.4.b |
| Association | CEGL007926 Green Ash - (Water Hickory) / Eastern Swamp-privet / Savanna Panicgrass Wet Floodplain Forest | CEGL007926 | 1.B.3.Nb.4.b |
Concept Lineage: No Data Available
Predecessors: No Data Available
Obsolete Names: No Data Available
Obsolete Parents: No Data Available
Synonomy: No Data Available
- Southeastern Ecology Working Group of NatureServe. No date. International Ecological Classification Standard: International Vegetation Classification. Terrestrial Vegetation. NatureServe, Durham, NC.