Invalid Unit Specified
CEGL007234 Schoenoplectus pungens - Conoclinium betonicifolium - Setaria parviflora - Flaveria brownii Coastal Marsh

The U.S. National
Vegetation Classification
Type Concept Sentence:
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Common (Translated Scientific) Name: Common Threesquare - Betonyleaf Thoroughwort - Marsh Bristlegrass - Brown's Yellowtops Coastal Marsh
Colloquial Name:
Hierarchy Level: Association
Type Concept: This vegetation occurs in interdunal swales and other marshy areas on barrier islands along the south Texas coast. These wetlands are characterized (and may be dominated) by Schoenoplectus pungens, Typha domingensis, Flaveria brownii, Bacopa monnieri, Centella erecta, Phyla nodiflora, and/or Sesbania herbacea. Associated species may include Conoclinium betonicifolium, Setaria parviflora, Andropogon glomeratus, Pluchea odorata var. odorata, and Iva texensis. This provisional community is described from very limited plot data from Padre Island National Seashore, Texas. Some plots attributed to this type were dominated by annuals such as Flaveria brownii and Sesbania herbacea. Classification of these ephemeral ponds and depressions is difficult because of seasonal and weather-related shifts in species composition and dominance.
Diagnostic Characteristics: No Data Available
Rationale for Nominal Species or Physiognomic Features:
Classification Comments: This community might warrant splitting into separate types but we were not able to discern clear ecological patterns from the cluster analysis. More data will be necessary to discern these patterns if they are relevant. Taken as a whole, these wetlands tend to share a suite of species, but individual occurrences may exhibit strong dominance by different species. Separate types, e.g., one dominated by Schoenoplectus pungens and one dominated by Typha domingensis, are supported by the classification results of other studies of Padre Island and other barrier islands along the Gulf of Mexico (Judd and Lonard 2009). This provisional community is described from very limited plot data from Padre Island National Seashore, Texas. Classification of these ephemeral ponds and depressions is difficult because of seasonal and weather-related shifts in species composition and dominance. This community was described from 12 plots at Padre Island National Seashore that loosely clustered together, but Homoteneity and Goodness of Fit were low. This community represents a diverse set of occurrences with seasonal and aspect dominance that differs among sites. They are tied together by their landscape setting and presence of freshwater to oligohaline species not necessarily by dominance patterns. Based on dominance patterns alone, each plot might represent a different type. For classification purposes, more weight was given to perennial species with greater biomass, such as Schoenoplectus pungens and Typha domingensis even though their cover was low in some plots. Future sampling might best be conducted by repeatedly sampling sites across seasons and years.
Similar NVC Types:
Physiognomy and Structure: No Data Available
Floristics: These wetlands are characterized (and may be dominated) by Schoenoplectus pungens, Typha domingensis, Flaveria brownii, Bacopa monnieri, Centella erecta, Phyla nodiflora, and/or Sesbania herbacea. Associated species may include Conoclinium betonicifolium, Setaria parviflora, Andropogon glomeratus, Pluchea odorata var. odorata, and Iva texensis. This provisional community is described from very limited plot data from Padre Island National Seashore, Texas. Some plots attributed to this type were dominated by annuals such as Flaveria brownii and Sesbania herbacea. Classification of these ephemeral ponds and depressions is difficult because of seasonal and weather-related shifts in species composition and dominance. The annual forb Flaveria brownii can tend to dominate ponds during a drought that might be dominated by different species (e.g., Schoenoplectus pungens or Typha domingensis) during wetter periods.
Dynamics: No Data Available
Environmental Description: This vegetation occurs in interdunal swales and other marshy areas on barrier islands along the south Texas coast.
Geographic Range: This vegetation occurs in interdunal swales and other marshy areas on barrier islands along the south Texas coast.
Nations: US
States/Provinces: TX
US Forest Service Ecoregions (1994/1995)
Domain Name:
Division Name:
Province Name: Prairie Parkland (Subtropical) Province
Province Code: 255    Occurrence Status: Confident or certain
Section Name: Central Gulf Prairies and Marshes Section
Section Code: 255D     Occurrence Status: Confident or certain
Omernik Ecoregions: 34:C, 34i:C
Confidence Level: Low - Poorly Documented
Confidence Level Comments:
Grank: GNR
Greasons:
Concept Lineage:
Predecessors:
Obsolete Names:
Obsolete Parents:
Synonomy:
Concept Author(s): J. Teague
Author of Description: J. Teague
Acknowledgements:
Version Date: 07Oct2014
References:
  • Judd, F. W., and R. I. Lonard. 2009. Vegetation of South Padre Island, Texas: Freshwater and brackish wetlands. Texas Journal of Science 61(2):83-96.
  • Southeastern Ecology Working Group of NatureServe. No date. International Ecological Classification Standard: International Vegetation Classification. Terrestrial Vegetation. NatureServe, Durham, NC.