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CEGL005802 Ephedra torreyana - Achnatherum hymenoides Hummock Shrubland
Type Concept Sentence: No Data Available
Common (Translated Scientific) Name: Torrey''s Joint-fir - Indian Ricegrass Hummock Shrubland
Colloquial Name: No Data Available
Hierarchy Level: Association
Type Concept: This shrubland association is currently only known from Wupatki National Monument in Arizona, and the following description is based on occurrences there. Additional information will be added as it becomes available. Elevation ranges from 1475-1485 m (4839-4872 feet). Stands occur on flat or low slopes from 0-5%. This association occurs specifically on cinder dunes or hummocks with cinder substrate. Total vegetation cover ranges from 20-25% in the shrub and herbaceous layers. The total species diversity ranges from 6-9 species within sampled plots. The shrub layer is dominated by Ephedra torreyana. However, Fallugia paradoxa may dominate or codominate in some areas. The herbaceous layer is low to moderate with Achnatherum hymenoides occurring and acting as an indicator species for this association.
Diagnostic Characteristics: No Data Available
Rationale for Nominal Species or Physiognomic Features: No Data Available
Classification Comments: This association is likely to occur on sandy substrates throughout the Colorado Plateau region. It is poorly documented at present.
Similar NVC Types: No Data Available
note: No Data Available
Physiognomy and Structure: No Data Available
Floristics: No Data Available
Dynamics: No Data Available
Environmental Description: No Data Available
Geographic Range: This association is currently only known from Wupatki National Monument in Arizona. It is likely to occur on sandy substrates throughout the Colorado Plateau region. It is poorly documented at present, and additional range information will be added as it becomes available.
Nations: US
States/Provinces: AZ
Plot Analysis Summary:
http://vegbank.org/natureserve/ELEMENT_GLOBAL.2.684775
Confidence Level: Low
Confidence Level Comments: No Data Available
Grank: GNR
Greasons: No Data Available
| Type | Name | Database Code | Classification Code |
|---|---|---|---|
| Class | 3 Desert & Semi-Desert Class | C03 | 3 |
| Subclass | 3.B Cool Semi-Desert Scrub & Grassland Subclass | S11 | 3.B |
| Formation | 3.B.1 Cool Semi-Desert Scrub & Grassland Formation | F033 | 3.B.1 |
| Division | 3.B.1.Ne Western North American Cool Semi-Desert Scrub & Grassland Division | D040 | 3.B.1.Ne |
| Macrogroup | 3.B.1.Ne.1 Yellow Rabbitbrush - Blackbrush / Indian Ricegrass Dry Shrubland & Grassland Macrogroup | M171 | 3.B.1.Ne.1 |
| Group | 3.B.1.Ne.1.b Blackbrush - Cutler''s Joint-fir - Torrey''s Joint-fir Colorado Plateau Shrubland Group | G312 | 3.B.1.Ne.1.b |
| Alliance | A2572 Torrey''s Joint-fir Shrubland Alliance | A2572 | 3.B.1.Ne.1.b |
| Association | CEGL005802 Torrey''s Joint-fir - Indian Ricegrass Hummock Shrubland | CEGL005802 | 3.B.1.Ne.1.b |
Concept Lineage: No Data Available
Predecessors: No Data Available
Obsolete Names: No Data Available
Obsolete Parents: No Data Available
Synonomy: = Ephedra torreyana - Achnatherum hymenoides Hummock Shrubland (Hansen et al. 2004b)
- Coles, J., M. Hansen, and K. Thomas. 2003. Wupatki National Monument, Arizona, vegetation classification and distribution: A USGS-NPS Vegetation Mapping Program study. Southwest Biological Science Center, U.S. Geological Survey Open-file Report. [in preparation]
- Hansen, M., J. Coles, K. A. Thomas, D. Cogan, M. Reid, J. Von Loh, and K. Schulz. 2004b. USGS-NPS Vegetation Mapping Program: Wupatki National Monument, Arizona, vegetation classification and distribution. U.S. Geological Survey Technical Report. Southwest Biological Science Center, Flagstaff, AZ. 229 pp.
- Western Ecology Working Group of NatureServe. No date. International Ecological Classification Standard: International Vegetation Classification. Terrestrial Vegetation. NatureServe, Boulder, CO.