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CEGL005756 Larrea tridentata - Ambrosia dumosa - Amphipappus fremontii Desert Shrubland
Type Concept Sentence: No Data Available
Common (Translated Scientific) Name: Creosotebush - Burrobush - Fremont''s Chaffbush Desert Shrubland
Colloquial Name: No Data Available
Hierarchy Level: Association
Type Concept: This scrub association is found at low to upper elevations in the Mojave Desert and southern Great Basin in Arizona, California and southern Nevada. Vegetation is characterized by an open to moderate shrub canopy codominated by Ambrosia dumosa, Larrea tridentata, and Amphipappus fremontii. Other shrubs frequently present include Echinocactus polycephalus, Encelia farinosa, and Opuntia basilaris. If present, the herbaceous layer is variable, ranging from sparse to open, with scattered Cryptantha spp. characteristic. Stands occur on variable slope positions ranging from 450-1300 m elevation. Sites occur on flat to steep slopes on variable aspects. Soils range from loamy sand to clay loam and are derived from a variety of substrates such as alluvium, andesite, basalt, gneiss, limestone, sand, and sandstone.
Diagnostic Characteristics: No Data Available
Rationale for Nominal Species or Physiognomic Features: No Data Available
Classification Comments: No Data Available
Similar NVC Types: No Data Available
note: No Data Available
Physiognomy and Structure: No Data Available
Floristics: Vegetation is characterized by an open to moderate shrub canopy (7-28% cover) codominated by Ambrosia dumosa, Larrea tridentata, and Amphipappus fremontii (Evens et al. 2014). Other shrubs frequently present include Echinocactus polycephalus, Encelia farinosa, and Opuntia basilaris (Evens et al. 2014). If present, the herbaceous layer is variable, ranging from sparse to open (to 21% cover), with of Cryptantha spp. characteristic (Evens et al. 2014).
Dynamics: No Data Available
Environmental Description: This scrub association is found at low to upper elevations in the Mojave Desert and southern Great Basin in Arizona, California and southern Nevada. It occurs on variable slope positions ranging from 450-1300 m elevation (Evens et al. 2014). Sites occur on flat to steep slopes (to 29°) on variable aspects (Evens et al. 2014). Soils range from loamy sand to clay loam and are derived from a variety of substrates such as alluvium, andesite, basalt, gneiss, limestone, sand, and sandstone (Evens et al. 2014).
Geographic Range: The association is found in the Mojave Desert and southern Great Basin. It was sampled in Lake Mead National Recreation Area in Arizona and Nevada, and Death Valley National Park and Mojave National Preserve in California.
Nations: US
States/Provinces: AZ, CA, NV
Plot Analysis Summary:
http://vegbank.org/natureserve/ELEMENT_GLOBAL.2.971698
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.A Warm Desert & Semi-Desert Woodland, Scrub & Grassland Subclass | S06 | 3.A |
| Formation | 3.A.2 Warm Desert & Semi-Desert Scrub & Grassland Formation | F015 | 3.A.2 |
| Division | 3.A.2.Na North American Warm Desert Scrub & Grassland Division | D039 | 3.A.2.Na |
| Macrogroup | 3.A.2.Na.4 Saguaro - Organ Pipe Cactus - Burrobush Mojave-Sonoran Semi-Desert Scrub Macrogroup | M088 | 3.A.2.Na.4 |
| Group | 3.A.2.Na.4.b Creosotebush - Burrobush - Brittlebush Desert Scrub Group | G295 | 3.A.2.Na.4.b |
| Alliance | A3277 Creosotebush - Burrobush Bajada & Valley Desert Scrub Alliance | A3277 | 3.A.2.Na.4.b |
| Association | CEGL005756 Creosotebush - Burrobush - Fremont''s Chaffbush Desert Shrubland | CEGL005756 | 3.A.2.Na.4.b |
Concept Lineage: No Data Available
Predecessors: No Data Available
Obsolete Names: No Data Available
Obsolete Parents: No Data Available
Synonomy: = Larrea tridentata - Ambrosia dumosa - Amphipappus fremontii (Sawyer et al. 2009) [33.140.40]
= Larrea tridentata-Ambrosia dumosa-Amphipappus fremontii Association (Evens et al. 2014)
= Larrea tridentata-Ambrosia dumosa-Amphipappus fremontii Association (Keeler-Wolf and Thomas 2000)
< Larrea tridentata-Ambrosia dumosa Shrubland Alliance (Keeler-Wolf and Thomas 2000)
= Larrea tridentata-Ambrosia dumosa-Amphipappus fremontii Association (Evens et al. 2014)
= Larrea tridentata-Ambrosia dumosa-Amphipappus fremontii Association (Keeler-Wolf and Thomas 2000)
< Larrea tridentata-Ambrosia dumosa Shrubland Alliance (Keeler-Wolf and Thomas 2000)
- Evens, J. M., K. Sikes, D. Hastings, and J. Ratchford. 2014. Vegetation alliance descriptions for Lake Mead National Recreation Area, Death Valley National Park and Mojave National Preserve. Unpublished report submitted to USDI National Park Service, Mojave Desert Network Inventory and Monitoring Program. California Native Plant Society, Sacramento, CA.
- Keeler-Wolf, T., and K. Thomas. 2000. Draft descriptions of vegetation alliances for the Mojave Ecosystem Mapping project. California Natural Diversity Database, California Department of Fish and Game, Sacramento.
- Sawyer, J. O., T. Keeler-Wolf, and J. Evens. 2009. A manual of California vegetation. Second edition. California Native Plant Society, Sacramento CA. 1300 pp.
- Western Ecology Working Group of NatureServe. No date. International Ecological Classification Standard: International Vegetation Classification. Terrestrial Vegetation. NatureServe, Boulder, CO.