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CEGL005740 Atriplex hymenelytra - Ambrosia dumosa Shrubland
Type Concept Sentence: No Data Available
Common (Translated Scientific) Name: Desert-holly - Burrobush Shrubland
Colloquial Name: No Data Available
Hierarchy Level: Association
Type Concept: This upland scrub association occurs in the Mojave Desert and Great Basin in California and Nevada. Atriplex hymenelytra and Ambrosia dumosa are codominant and characteristic species in the sparse to open shrub layer (4-21% cover) with Larrea tridentata often present. Scattered herbaceous species may be present. Stands are found commonly along gravelly bajadas and slopes at low to middle elevations (300-1300 m). Sites occur on gentle to very steep slopes (3 to 49°) on all aspects. Soils are typically coarser-textured such as sand and loam, but range to clay loam and silty clay and are derived from sedimentary substrates, alluvium, and less commonly rhyolite.
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 codominance of Atriplex hymenelytra and Ambrosia dumosa in the sparse to open shrub layer (4-21% cover) with Larrea tridentata frequently present (Evens et al. 2014). Other occasional shrubs and succulents include Echinocactus polycephalus, Encelia farinosa, Opuntia basilaris, and Stephanomeria pauciflora (Evens et al. 2014). Scattered herbaceous species may be present, especially Eriogonum inflatum with Chorizanthe rigida, Cryptantha spp., Plantago ovata, Xylorhiza tortifolia, and exotic Schismus spp. (Evens et al. 2014).
Dynamics: No Data Available
Environmental Description: Stands are found commonly along gravelly bajadas and slopes at low to middle elevations (300-1300 m). Sites occur on gentle to very steep slopes (3 to 49°) on all aspects, but are less common on warmer, westerly aspects (Evens et al. 2014). Soils are typically coarser-textured such as sand and loam, but range to clay loam and silty clay (Evens et al. 2014). Soils are derived from sedimentary substrates such as alluvium, conglomerate, sandstone, limestone, and less commonly rhyolite (Evens et al. 2014).
Geographic Range: This association occurs on bajadas in the Mojave Desert and southern Great Basin in southeastern California, northwestern Arizona, and southern Nevada. It was sampled in Death Valley National Park and Lake Mead National Recreation Area.
Nations: US
States/Provinces: AZ, CA, NV
Plot Analysis Summary:
http://vegbank.org/natureserve/ELEMENT_GLOBAL.2.971570
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.6 Ocotillo - Desert-holly - Watson''s Amaranth North American Rock Vegetation Macrogroup | M117 | 3.A.2.Na.6 |
| Group | 3.A.2.Na.6.a Ocotillo - Bear-grass species - Desert-holly Rock Vegetation Group | G569 | 3.A.2.Na.6.a |
| Alliance | A0872 Desert-holly Scrub Alliance | A0872 | 3.A.2.Na.6.a |
| Association | CEGL005740 Desert-holly - Burrobush Shrubland | CEGL005740 | 3.A.2.Na.6.a |
Concept Lineage: No Data Available
Predecessors: No Data Available
Obsolete Names: No Data Available
Obsolete Parents: No Data Available
Synonomy: = Atriplex hymenelytra - Ambrosia dumosa (Sawyer et al. 2009) [36.330.02]
= Atriplex hymenelytra - Ambrosia dumosa Association (Evens et al. 2014)
= Atriplex hymenelytra-Ambrosia dumosa Association (Keeler-Wolf and Thomas 2000) [33.060.03, inactivate 36.330.02]
< Atriplex hymenelytra Shrubland Alliance (Keeler-Wolf and Thomas 2000)
= Atriplex hymenelytra - Ambrosia dumosa Association (Evens et al. 2014)
= Atriplex hymenelytra-Ambrosia dumosa Association (Keeler-Wolf and Thomas 2000) [33.060.03, inactivate 36.330.02]
< Atriplex hymenelytra 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.