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CEGL003521 Quercus grisea / Juniperus deppeana Scrub Woodland
Type Concept Sentence: No Data Available
Common (Translated Scientific) Name: Gray Oak / Alligator Juniper Scrub Woodland
Colloquial Name: No Data Available
Hierarchy Level: Association
Type Concept: This woodland occurs in western Texas, southeastern Arizona, and likely southern New Mexico and northern Mexico. Stands occur in mountains, foothills, bajadas and canyon bottoms. Elevation of a stand at Buenos Aires National Wildlife Refuge is 1362 m (4470 feet). Soils are shallow, gravelly or stony sandy loams or sandy clay loams, derived from a mixture of alluvium and colluvium. The vegetation is characterized by an open to moderately dense evergreen tree layer (10-60% cover) codominated by Quercus grisea and Juniperus deppeana. The tree canopy is typically 5-10 m tall. Stands range from open woodland/savanna at lower elevations to moderately dense woodland at higher elevations and in canyon bottoms. There may be a sparse to moderately dense shrub layer dominated by Juniperus deppeana or Quercus grisea. Other characteristic shrubs include Bouvardia ternifolia, Cercocarpus montanus, Erythrina flabelliformis, Garrya wrightii, Morus microphylla, or Rhus trilobata. Vines such as Sageretia wrightii and Vitis arizonica are common in riparian stands. The herbaceous layer is generally sparse, but the often diverse forb layer may include Artemisia ludoviciana, Cheilanthes spp., Hybanthus attenuatus, Mirabilis spp., Muhlenbergia dumosa, Muhlenbergia rigens, Pellaea atropurpurea, and Thalictrum fendleri. Diagnostic of this association is the codominance of Quercus grisea and Juniperus deppeana in the tree canopy and/or shrub layer. The herbaceous layer is generally sparse.
Diagnostic Characteristics: No Data Available
Rationale for Nominal Species or Physiognomic Features: No Data Available
Classification Comments: The single stand sampled at Buenos Aires National Wildlife Refuge has a Juniperus overstory and Quercus understory. It was classified as ~Quercus grisea / Juniperus deppeana Scrub Woodland (CEGL003521)$$ as a "best fit" even though it is also similar to Juniperus deppeana woodlands, and the encinal association is currently only reported from mountains in Trans-Pecos Texas. More classification work is needed to clarify differences.
Similar NVC Types: No Data Available
note: No Data Available
Physiognomy and Structure: No Data Available
Floristics: The vegetation is characterized by an open to moderately dense evergreen tree layer (10-60% cover) codominated by Quercus grisea and Juniperus deppeana. The tree canopy is typically 5-10 m tall. Stands range from open woodland/savanna at lower elevations to moderately dense woodland at higher elevations and in canyon bottoms. There may be a sparse to moderately dense shrub layer dominated by Juniperus deppeana or Quercus grisea. Other characteristic shrubs include Bouvardia ternifolia (= Bouvardia glaberrima), Cercocarpus montanus, Erythrina flabelliformis, Garrya wrightii, Morus microphylla, or Rhus trilobata. Vines such as Sageretia wrightii and Vitis arizonica are common in riparian stands. The herbaceous layer is generally sparse, but the often diverse forb layer may include Artemisia ludoviciana, Cheilanthes spp., Hybanthus attenuatus, Mirabilis spp., Muhlenbergia dumosa, Muhlenbergia rigens, Pellaea atropurpurea, and Thalictrum fendleri. Diagnostic of this association is the codominance of Quercus grisea and Juniperus deppeana in the tree canopy and/or shrub layer. The herbaceous layer is generally sparse.
Dynamics: No Data Available
Environmental Description: This woodland occurs in western Texas, southeastern Arizona, and likely southern New Mexico and northern Mexico. Stands occur in mountains, foothills, bajadas and canyon bottoms. Elevation of a stand at Buenos Aires National Wildlife Refuge is 1362 m (4470 feet). Soils are shallow, gravelly or stony sandy loams or sandy clay loams, derived from a mixture of alluvium and colluvium.
Geographic Range: This woodland association occurs in western Texas, southeastern Arizona, and likely southern New Mexico and northern Mexico.
Nations: MX?,US
States/Provinces: AZ, NM?, TX
Plot Analysis Summary:
http://vegbank.org/natureserve/ELEMENT_GLOBAL.2.686677
Confidence Level: Low - Poorly Documented
Confidence Level Comments: No Data Available
Grank: GNR
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.1 Warm Temperate Forest & Woodland Formation | F018 | 1.B.1 |
| Division | 1.B.1.Nd Madrean-Balconian Forest & Woodland Division | D060 | 1.B.1.Nd |
| Macrogroup | 1.B.1.Nd.1 Alligator Juniper - Mexican Pinyon - Arizona White Oak Madrean Lowland Evergreen Woodland Macrogroup | M010 | 1.B.1.Nd.1 |
| Group | 1.B.1.Nd.1.a Arizona White Oak - Emory Oak - Mexican Blue Oak Woodland Group | G201 | 1.B.1.Nd.1.a |
| Alliance | A3101 Arizona White Oak - Emory Oak - Gray Oak Scrub Woodland Alliance | A3101 | 1.B.1.Nd.1.a |
| Association | CEGL003521 Gray Oak / Alligator Juniper Scrub Woodland | CEGL003521 | 1.B.1.Nd.1.a |
Concept Lineage: No Data Available
Predecessors: No Data Available
Obsolete Names: No Data Available
Obsolete Parents: No Data Available
Synonomy: ? IB3a. Gray Oak Woodland (Allard 1990)
- Allard, D. J. 1990. Southeastern United States ecological community classification. Interim report, Version 1.2. The Nature Conservancy, Southeast Regional Office, Chapel Hill, NC. 96 pp.
- Diamond, D. D. 1993. Classification of the plant communities of Texas (series level). Unpublished document. Texas Natural Heritage Program, Austin. 25 pp.
- Schulz, K. A. 2004. Vegetation classification of Buenos Aires National Wildlife Refuge, Arizona. Unpublished report submitted to USDI Fish and Wildlife Service. NatureServe, Western Regional Office, Boulder, CO.
- Southeastern Ecology Working Group of NatureServe. No date. International Ecological Classification Standard: International Vegetation Classification. Terrestrial Vegetation. NatureServe, Durham, NC.