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CEGL005137 Larrea tridentata - Ambrosia dumosa - Krameria (erecta, grayi) Shrubland
Type Concept Sentence: No Data Available
Common (Translated Scientific) Name: Creosotebush - Burrobush - (Littleleaf Ratany, White Ratany) Shrubland
Colloquial Name: No Data Available
Hierarchy Level: Association
Type Concept: This creosotebush shrubland association occurs in Arizona, California and Nevada. It is currently described from Grand Canyon National Park and Grand Canyon-Parashant National Monument in Arizona. More survey and classification work are needed to fully characterize this type. It occurs on a variety of landforms including sideslopes, drainage bottoms, and ridges at 375 to 625 m (1250-2075 feet) elevation, but can be found as high as 875 m (2850 feet). It is typically found on low gradients (1-5°), but occasionally occurs on steeper slopes (10-30°). The community seems to occur across all aspects besides west-facing, and seems to occur in various soil types. Vegetation is characterized by the codominance of three species: the tall shrub Larrea tridentata, the short shrub Krameria grayi, and the dwarf-shrub Ambrosia dumosa. The short-shrub layer also frequently supports the cactus Cylindropuntia acanthocarpa and occasionally Krameria erecta. Opuntia basilaris is the only other dwarf-shrub that occurs regularly. Bromus rubens (exotic) and Vulpia octoflora are common in the sparse graminoid understory. Plantago ovata, Antheropeas lanosum, and Erodium cicutarium (exotic) are common members of the very sparse forb stratum.
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 the codominance of three species: the tall shrub Larrea tridentata, the short shrub Krameria grayi, and the dwarf-shrub Ambrosia dumosa. The short-shrub layer also frequently supports the cactus Cylindropuntia acanthocarpa (= Opuntia acanthocarpa) and occasionally Krameria erecta. Opuntia basilaris is the only other dwarf-shrub that occurs regularly. Bromus rubens (exotic) and Vulpia octoflora are common in the sparse graminoid understory. Plantago ovata, Antheropeas lanosum, and Erodium cicutarium (exotic) are common members of the very sparse forb stratum.
Dynamics: No Data Available
Environmental Description: This creosotebush shrubland occurs on a variety of landforms including sideslopes, drainage bottoms, and ridges at 375 to 625 m (1250-2075 feet) elevation, but can be found as high as 875 m (2850 feet). It is typically found on low gradients (1-5°), but occasionally occurs on steeper slopes (10-30°). The community seems to occur across all aspects besides west-facing, and seems to occur in various soil types.
Geographic Range: This Mojave Desert shrubland association occurs in northern Arizona, southeastern California and southern Nevada. More survey work is needed to fully document its global range.
Nations: US
States/Provinces: AZ, CA, NV
Plot Analysis Summary:
http://vegbank.org/natureserve/ELEMENT_GLOBAL.2.840590
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 | CEGL005137 Creosotebush - Burrobush - (Littleleaf Ratany, White Ratany) Shrubland | CEGL005137 | 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 - Krameria (erecta, grayi) Shrubland (Reid and Hall 2010)
= Larrea tridentata - Ambrosia dumosa - Krameria erecta (Sawyer et al. 2009) [33.140.23]
> Larrea tridentata - Ambrosia dumosa - Krameria erecta Shrubland (Keeler-Wolf and Thomas 2000)
= Larrea tridentata - Ambrosia dumosa - Krameria grayi Association (Evens et al. 2012)
> Larrea tridentata - Ambrosia dumosa - Krameria grayi Shrubland (Keeler-Wolf and Thomas 2000)
> Larrea tridentata - Ambrosia dumosa - Krameria grayi Shrubland (Keeler-Wolf et al. 2005)
>< Larrea tridentata / Ambrosia deltoidea - Krameria grayii Association (Malusa 2003)
= Larrea tridentata-Ambrosia dumosa-Krameria (erecta, grayi) Association (Evens et al. 2014)
= Larrea tridentata - Ambrosia dumosa - Krameria erecta (Sawyer et al. 2009) [33.140.23]
> Larrea tridentata - Ambrosia dumosa - Krameria erecta Shrubland (Keeler-Wolf and Thomas 2000)
= Larrea tridentata - Ambrosia dumosa - Krameria grayi Association (Evens et al. 2012)
> Larrea tridentata - Ambrosia dumosa - Krameria grayi Shrubland (Keeler-Wolf and Thomas 2000)
> Larrea tridentata - Ambrosia dumosa - Krameria grayi Shrubland (Keeler-Wolf et al. 2005)
>< Larrea tridentata / Ambrosia deltoidea - Krameria grayii Association (Malusa 2003)
= Larrea tridentata-Ambrosia dumosa-Krameria (erecta, grayi) Association (Evens et al. 2014)
- Evens, J. M., D. Roach-McIntosh, and D. Stout. 2012. Vegetation descriptions for Joshua Tree National Park. Unpublished report submitted to USDI, National Park Service, Mojave Desert Inventory and Monitoring Network. California Native Plant Society, Sacramento, CA.
- 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.
- Kearsley, M. J. C., K. Green, M. Tukman, M. Reid, M. Hall, T. J. Ayers, and K. Christie. 2015. Grand Canyon National Park-Grand Canyon / Parashant National Monument vegetation classification and mapping project. Natural Resource Report NPS/GRCA/NRR--2015/913. National Park Service, Fort Collins, CO. 75 pp. plus appendices.
- Keeler-Wolf, T., S. San, and D. Hickson. 2005. Vegetation classification of Joshua Tree National Park, Riverside and San Bernardino counties, California. Unpublished report to the National Park Service. California Fish and Game and 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.
- Malusa, J. 2003. Vegetation of the Cabeza Prieta National Wildlife Refuge, Arizona. Report submitted to Organ Pipe Cactus National Monument, NPS Cooperative Agreement CA1248.00.002. TA. UA2-71, NPS Cooperative Agreement 1443CA860197006. USGS Southwest Biological Science Center, Sonoran Desert Field Station, University of Arizona, Tucson.
- Reid, M. S., and M. E. Hall. 2010. Vegetation classification of Grand Canyon National Park. Draft report submitted to National Park Service, Fort Collins, CO.
- 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.