International ecological classification standard: Terrestrial Ecological Classifications Sagebrush Vegetation Classification for the Western United States: Plant Associations and Alliances
A.829–Artemisia tridentata Shrubland Alliance
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- CEGL002699– Artemisia tridentata - (Ericameria nauseosa) / Bromus tectorum Semi-natural Shrubland
- CEGL001006– Artemisia tridentata / Achnatherum hymenoides Shrubland
- CEGL001011– Artemisia tridentata / Achnatherum lettermanii Shrubland
- CEGL000997– Artemisia tridentata / Bouteloua gracilis - Pascopyrum smithii Shrubland
- CEGL000996– Artemisia tridentata / Bouteloua gracilis - Pleuraphis jamesii Shrubland
- CEGL000995– Artemisia tridentata / Bouteloua gracilis Shrubland
- CEGL000999– Artemisia tridentata / Chrysothamnus viscidiflorus / Poa secunda Shrubland
- CEGL001001– Artemisia tridentata / Elymus elymoides Shrubland
- CEGL000998– Artemisia tridentata / Ericameria nauseosa Shrubland
- CEGL001005– Artemisia tridentata / Pleuraphis jamesii Shrubland
- CEGL001012– Artemisia tridentata / Symphoricarpos longiflorus Shrubland
- CEGL000991– Artemisia tridentata Shrubland
- CEGL001013– Artemisia tridentata Upperzone Community Shrubland
A.829–Artemisia tridentata Shrubland AllianceBasin Big Sagebrush Shrubland Alliance Stakeholders: Midwest, West Classif. Resp.: West ALLIANCE CONCEPT Summary: This broadly distributed alliance is found in the western United States on dry steppes. It occurs primarily in the West; however, this description is based on the vegetation in western North Dakota and eastern Montana. Shrubs are conspicuous in this alliance, but herbaceous species usually have equal or greater coverage. The shrub stratum is typically 0.3-0.7 m tall. Artemisia tridentata is the most abundant shrub. Stands of Artemisia tridentata in the Little Missouri National Grassland have been identified as Artemisia tridentata ssp. wyomingensis. Further review of the taxonomy in North and South Dakota is needed to determine the distribution of this alliance. Classification Comments: Internal Comments: MSR 9-01: There are no associations currently attributed to this alliance that occur in the Midwest. Range of distribution for this alliance needs review. Currently, the Artemisia tridentata Shrubland Alliance (A.829) is described by the Artemisia tridentata ssp. wyomingensis Shrubland Alliance (A.832). In the Midwest, the difference between these two alliances is not well understood. After further review, it may be that only one of the two alliances will be listed for the Midwest. Few other alliances in the Midwest are easily confused with this alliance. Some stands in the Sarcobatus vermiculatus Intermittently Flooded Shrub Herbaceous Alliance (A.1554) may be similar (USFS 1992). Further rangewide review of the alliance will likely identify other similar alliances in the West. Similar Alliances: Artemisia tridentata (ssp. tridentata, ssp. xericensis) Shrubland Alliance (A.830) Artemisia tridentata Shrub Herbaceous Alliance (A.1521) Artemisia tridentata ssp. vaseyana Shrub Herbaceous Alliance (A.1526) Artemisia tridentata ssp. vaseyana Shrubland Alliance (A.831) Artemisia tridentata ssp. wyomingensis Shrubland Alliance (A.832) Pleuraphis jamesii Herbaceous Alliance (A.1287) Pleuraphis jamesii Shrub Herbaceous Alliance (A.1532) Similar Alliance Comments: This is a very broadly defined alliance, containing associations dominated by one of any subspecies of Artemisia tridentata. Shrub cover in these associations averages >25%. Associations with stands containing Artemisia tridentata ssp. tridentata, Artemisia tridentata ssp. vaseyana, or Artemisia tridentata ssp. wyomingensis are included in this alliance if the particular subspecies was not distinguished in the primary literature. Efforts were made to contact many of the authors to determine the particular subspecies. Nonetheless, there remain several associations identified in the literature by the dominance of Artemisia tridentata with no information as to the subspecies. Several associations currently placed in this alliance are likely to be redundant with associations in one of the other alliances defined by subspecies of Artemisia tridentata. Related Concepts: Big Sagebrush Scrub (Holland 1986b) I Big Sagebrush Series (Sawyer and Keeler-Wolf 1995) I Western Shrub and Grasslands Combinations: 55: Sagebrush-Steppe (Artemisia-Agropyron) (Kuchler 1964) I Western Shrub: 38: Great Basin Sagebrush (Artemisia) (Kuchler 1964) I ALLIANCE DESCRIPTION Environment: This alliance occurs throughout the colder regions of the Intermountain West from the western Great Basin to the northern Rocky Mountains and Colorado Plateau at elevations ranging from 1000-3500 m. Stands also occur on the northern Great Plains at 500-1000 m elevation. Generally, these shrublands are associated with semi-arid climates with yearly precipitation ranging from 18-50 cm and high inter-annual variation. At all sites, much of the precipitation falls as snow, and growing-season drought is common. Temperatures are continental with large annual and diurnal variation. In drier regions, these shrublands are usually associated with perennial or ephemeral stream drainages with shallow water tables. These shrublands grow best on deep, fine- to medium-textured alluvial soils with some source of subirrigation during the summer season, but can also occur on shallow to moderately deep upland soils with ample moisture storage. Although the vegetation may grow in alkaline soils at the edge of internally drained basins, Artemisia tridentata is a non-halophyte and requires low salinity for optimum growth. Vegetation: Plant associations in this alliance occur in widely varied environmental and geographic settings, and species assemblages are correspondingly diverse. All stands are characterized by a somewhat sparse to moderately dense (25-75% cover) shrub layer of Artemisia tridentata ssp. tridentata, Artemisia tridentata ssp. wyomingensis, or Artemisia tridentata ssp. vaseyana. Widespread shrub associates include Ericameria nauseosa (= Chrysothamnus nauseosus), Chrysothamnus viscidiflorus, Grayia spinosa, Symphoricarpos longiflorus, Purshia tridentata, Ephedra viridis, Gutierrezia sarothrae, Tetradymia canescens, Sarcobatus vermiculatus, Prunus virginiana, and Atriplex spp. A sparse layer of cold-deciduous needle-leaved or scale-leaved evergreen trees may occasionally be emergent over the shrubs. Trees found across the range include Pinus ponderosa, Pinus jeffreyi, Pinus monophylla, Pinus edulis, Juniperus occidentalis, Juniperus osteosperma, Juniperus scopulorum, Juniperus monosperma, Populus tremuloides, Quercus garryana, Quercus gambelii, Cercocarpus ledifolius, and Yucca brevifolia. The herbaceous layer is typically dominated by bunch grasses which occupy patches in the shrub matrix. Some locally important graminoids include Poa secunda, Achnatherum hymenoides (= Oryzopsis hymenoides), Pascopyrum smithii, Elymus lanceolatus, Achnatherum lettermanii (= Stipa lettermanii), and Hesperostipa comata (= Stipa comata). Bouteloua gracilis and Pleuraphis jamesii (= Hilaria jamesii) are important associates in the eastern and southeastern extension of the range. Forbs are generally of low importance and are highly variable across the range, but may be diverse in some stands. Balsamorhiza sagittata, Achillea millefolium, and species of Astragalus, Oenothera, Eriogonum, and Erigeron are common in moist stands. Dynamics: ALLIANCE DISTRIBUTION Range: The vegetation in this alliance is common over much of the western United States, occurring from California, Washington, and Oregon across the Great Basin and Colorado Plateau to Utah, Arizona, New Mexico, Montana, and Wyoming. Nations: US Subnations: AZ, CA, ID, MT, NM, NV, OR?, UT, WA, WY? TNC Ecoregions: 6:C, 9:C, 10:C, 11:C, 17:C, 18:C, 19:C, 20:C, 26:C USFS Ecoregions: 313A:CC, 313B:CC, 322A:CC, 331D:CC, 331J:C?, 341C:CC, 342B:CC, 342C:CC, 342D:CC, 342I:CC, M261G:CC, M331D:CC, M331G:CC, M332D:C?, M332E:CC, M341A:CC, M341C:CC Federal Lands: NPS (Grand Canyon, Hovenweep, Zion); USFS (Little Missouri); USFWS (Ouray) ALLIANCE SOURCES References: Blackburn 1967, Blackburn et al. 1968a, Blackburn et al. 1968c, Blackburn et al. 1969a, Blackburn et al. 1969b, Blackburn et al. 1969c, Blackburn et al. 1969d, Blackburn et al. 1971, Caicco and Wellner 1983f, Caicco and Wellner 1983k, Daubenmire 1970, Eddleman and Jaindl 1994, Faber-Langendoen et al. 1996, Fenemore 1970, Francis 1986, Franklin and Dyrness 1973, Hansen et al. 1984, Harper and Jaynes 1986, Heinze et al. 1962, Hironaka et al. 1983, Holecheck and Stephenson 1983, Holland 1986b, Jameson et al. 1962, Jorgensen 1979, Kuchler 1964, Kurzius 1981, Leary and Peterson 1984, Lesica and DeVelice 1992, Loope 1969, McLean 1970, Moretti 1979, Moretti and Brotherson 1982, Poulton 1955, Ralston 1969, Rickard and Beatley 1965, Robertson 1971, Savage 1968, Sawyer and Keeler-Wolf 1995, Tueller and Blackburn 1974, Tueller et al. 1966, USFS 1992, Warren et al. 1982, West 1983c CEGL002699–Artemisia tridentata - (Ericameria nauseosa) / Bromus tectorum Semi-natural ShrublandBasin Big Sagebrush - (Rubber Rabbitbrush) / Cheatgrass Semi-natural Shrubland Classif. Resp.: West Classif. Level: Association Conf.: 3 - Weak Stakeholders: West Status: Standard Origin: 14-Aug-2001 Concept Auth.: Concept Ref.: Western Ecology Working Group n.d. Ecological Systems: Inter-Mountain Basins Big Sagebrush Shrubland (CES304.777) Inter-Mountain Basins Semi-Desert Shrub-Steppe (CES304.788) ELEMENT CONCEPT Summary: This association has only been described from Zion National Park. Until further inventory is completed there is no global information. Classification Comments: Similar Associations: Similar Association Comments: Related Concepts: ELEMENT DESCRIPTION Environment: Vegetation: Dynamics: Adjacent Associations: Adjacent Association Comments: Other Comments: Description Author: Version: ELEMENT GLOBAL RANK & REASONS GRank: GNR GRank Review Date: 14-Aug-2001 GReasons: Ranking Author: Version: ELEMENT DISTRIBUTION Range: This association has currently only been described from Zion National Park in southwestern Utah. Nations: US Subnations: UT TNC Ecoregions: 18:C, 19:C USFS Ecoregions: 313A:CC, M341:C Federal Lands: NPS (Hovenweep, Zion) ELEMENT SOURCES References: Cogan et al. 2004, Western Ecology Working Group n.d. CEGL001006–Artemisia tridentata / Achnatherum hymenoides ShrublandBasin Big Sagebrush / Indian Ricegrass Shrubland Classif. Resp.: West Classif. Level: Association Conf.: 2 - Moderate Stakeholders: West Status: Standard Origin: 26-Nov-1997 Concept Auth.: Concept Ref.: Western Ecology Working Group n.d. Ecological Systems: Inter-Mountain Basins Big Sagebrush Shrubland (CES304.777) ELEMENT CONCEPT Summary: Classification Comments: Similar Associations: Similar Association Comments: Related Concepts: Artemisia tridentata/Oryzopsis hymenoides (Bourgeron and Engelking 1994) = DRISCOLL FORMATION CODE:III.A.2.b. (Driscoll et al. 1984) B ELEMENT DESCRIPTION Environment: Vegetation: Dynamics: Adjacent Associations: Adjacent Association Comments: Other Comments: Description Author: Version: ELEMENT GLOBAL RANK & REASONS GRank: G3G5 GRank Review Date: 23-Feb-1994 GReasons: Ranking Author: Version: ELEMENT DISTRIBUTION Range: Nations: US Subnations: NV, UT:S3S5 TNC Ecoregions: 6:C, 11:C USFS Ecoregions: 341:C, 342B:CC Federal Lands: ELEMENT SOURCES References: Blackburn et al. 1968a, Blackburn et al. 1969a, Blackburn et al. 1969d, Bourgeron and Engelking 1994, Driscoll et al. 1984, Harper and Jaynes 1986, Rickard and Beatley 1965, Western Ecology Working Group n.d. CEGL001011–Artemisia tridentata / Achnatherum lettermanii ShrublandBasin Big Sagebrush / Letterman's Needlegrass Shrubland Classif. Resp.: West Classif. Level: Association Conf.: 2 - Moderate Stakeholders: West Status: Standard Origin: 26-Nov-1997 Concept Auth.: Concept Ref.: Western Ecology Working Group n.d. Ecological Systems: Inter-Mountain Basins Big Sagebrush Shrubland (CES304.777) ELEMENT CONCEPT Summary: Classification Comments: Similar Associations: Similar Association Comments: Related Concepts: Artemisia tridentata/Stipa lettermanii (Bourgeron and Engelking 1994) = DRISCOLL FORMATION CODE:III.A.2.b. (Driscoll et al. 1984) B ELEMENT DESCRIPTION Environment: Vegetation: Dynamics: Adjacent Associations: Adjacent Association Comments: Other Comments: Description Author: Version: ELEMENT GLOBAL RANK & REASONS GRank: G5 GRank Review Date: 23-Feb-1994 GReasons: Ranking Author: Version: ELEMENT DISTRIBUTION Range: Nations: US Subnations: NV:S5 TNC Ecoregions: 6:C USFS Ecoregions: 342B:CC Federal Lands: ELEMENT SOURCES References: Blackburn et al. 1969c, Bourgeron and Engelking 1994, Driscoll et al. 1984, Heinze et al. 1962, Western Ecology Working Group n.d. CEGL000997–Artemisia tridentata / Bouteloua gracilis - Pascopyrum smithii ShrublandBasin Big Sagebrush / Blue Grama - Western Wheatgrass Shrubland Classif. Resp.: West Classif. Level: Association Conf.: 2 - Moderate Stakeholders: West Status: Standard Origin: 26-Nov-1997 Concept Auth.: Concept Ref.: Western Ecology Working Group n.d. Ecological Systems: Inter-Mountain Basins Big Sagebrush Shrubland (CES304.777) ELEMENT CONCEPT Summary: Classification Comments: Similar Associations: Similar Association Comments: Related Concepts: Artemisia tridentata/Bouteloua gracilis-Pascopyrum smithii (Bourgeron and Engelking 1994) = DRISCOLL FORMATION CODE:III.A.2.b. (Driscoll et al. 1984) B ELEMENT DESCRIPTION Environment: Vegetation: Dynamics: Adjacent Associations: Adjacent Association Comments: Other Comments: Description Author: Version: ELEMENT GLOBAL RANK & REASONS GRank: G5 GRank Review Date: 23-Feb-1994 GReasons: Ranking Author: Version: ELEMENT DISTRIBUTION Range: Nations: US Subnations: NM:S5 TNC Ecoregions: 20:C USFS Ecoregions: 313:?, 331J:??, 342:? Federal Lands: ELEMENT SOURCES References: Bourgeron and Engelking 1994, Driscoll et al. 1984, Francis 1986, Holecheck and Stephenson 1983, Western Ecology Working Group n.d. CEGL000996–Artemisia tridentata / Bouteloua gracilis - Pleuraphis jamesii ShrublandBasin Big Sagebrush / Blue Grama - James' Galleta Shrubland Classif. Resp.: West Classif. Level: Association Conf.: 2 - Moderate Stakeholders: West Status: Standard Origin: 26-Nov-1997 Concept Auth.: Concept Ref.: Western Ecology Working Group n.d. Ecological Systems: Inter-Mountain Basins Big Sagebrush Shrubland (CES304.777) ELEMENT CONCEPT Summary: Classification Comments: Similar Associations: Similar Association Comments: Related Concepts: Artemisia tridentata/Bouteloua gracilis-Hilaria jamesii (Bourgeron and Engelking 1994) = DRISCOLL FORMATION CODE:III.A.2.b. (Driscoll et al. 1984) B ELEMENT DESCRIPTION Environment: Vegetation: Dynamics: Adjacent Associations: Adjacent Association Comments: Other Comments: Description Author: Version: ELEMENT GLOBAL RANK & REASONS GRank: G5 GRank Review Date: 23-Feb-1994 GReasons: Ranking Author: Version: ELEMENT DISTRIBUTION Range: Nations: US Subnations: NM:S5 TNC Ecoregions: 19:C, 20:C USFS Ecoregions: 313B:CC, 331J:??, M331G:CC Federal Lands: ELEMENT SOURCES References: Bourgeron and Engelking 1994, Driscoll et al. 1984, Francis 1986, Western Ecology Working Group n.d. CEGL000995–Artemisia tridentata / Bouteloua gracilis ShrublandBasin Big Sagebrush / Blue Grama Shrubland Classif. Resp.: West Classif. Level: Association Conf.: 2 - Moderate Stakeholders: West Status: Standard Origin: 26-Nov-1997 Concept Auth.: K.A. Schulz Concept Ref.: Western Ecology Working Group n.d. Ecological Systems: Inter-Mountain Basins Big Sagebrush Shrubland (CES304.777) ELEMENT CONCEPT Summary: This shrubland has only been described from the plateaus and mesas of Grand Canyon and Zion national parks in northwestern Arizona and southwestern Utah, but it is more widespread and likely occurs in New Mexico and Nevada. Sites range from valley bottoms and drainages to rolling hills, mesa tops and terraces. Substrates are alluvial soils derived from limestone or volcanic flows or sandy-textured soil derived from sandstone or sandy limestone. Stands have an open, short-shrub canopy (less than 1 m tall) that is dominated by the evergreen microphyllous shrub Artemisia tridentata usually with greater than 20% cover. Other common shrubs and dwarf-shrubs may include Gutierrezia sarothrae, Chrysothamnus viscidiflorus, Atriplex canescens, Krascheninnikovia lanata, or Ephedra viridis. The sparse herbaceous layer is dominated by the short perennial bunchgrass Bouteloua gracilis with Achnatherum hymenoides (= Oryzopsis hymenoides), Pascopyrum smithii, or Sporobolus cryptandrus often present. Forbs are sparse. Scattered Juniperus osteosperma trees and succulents such as Opuntia spp. may also be present. Classification Comments: On Fishtail Mesa, cover of Artemisia bigelovii was lumped with Artemisia tridentata in plot summary tables as "Artemisia" by Jameson et al. (1962) and Rowlands and Brian (1996). It is not clear if these shrub species co-occurred within the plot sites or not. Similar Associations: Similar Association Comments: Related Concepts: 152.1111 Artemisia tridentata - Gutierrezia sarothrae - Bouteloua gracilis (Warren et al. 1982) = Artemisia tridentata/Bouteloua gracilis (Bourgeron and Engelking 1994) = DRISCOLL FORMATION CODE:III.A.2.b. (Driscoll et al. 1984) B Shrub Type (Jameson et al. 1962) = ELEMENT DESCRIPTION Environment: This shrubland has only been described from the plateaus and mesas of Grand Canyon and Zion national parks in northwestern Arizona and southwestern Utah, but it is more widespread and likely occurs in New Mexico and Nevada. Elevations range from 1370-2040 m. Sites range from valley bottoms and drainages to rolling hills, mesa tops and terraces. Substrates include sandy-textured soils derived from sandstone or sandy limestone and moderately deep, fine-textured, alkaline, calcareous, alluvial soils derived from limestone or volcanic flows. Vegetation: This shrubland is characterized by an open, short-shrub canopy (less than 2 m tall) that is dominated by the evergreen microphyllous shrub Artemisia tridentata usually with greater than 20% cover. Other common shrubs and dwarf-shrubs may include Gutierrezia sarothrae, Chrysothamnus viscidiflorus, Atriplex canescens, Ephedra viridis, Krascheninnikovia lanata, or Tetradymia canescens. The sparse herbaceous layer is dominated by the short perennial bunchgrass Bouteloua gracilis with Achnatherum hymenoides (= Oryzopsis hymenoides), Pascopyrum smithii, or Sporobolus cryptandrus often present. Forbs are sparse but may include species of Castilleja, Eriogonum, Lupinus, and Penstemon. Scattered Juniperus osteosperma trees and succulents such as Opuntia spp. may also be present. Dynamics: Artemisia tridentata shrubs are readily killed by fire and do not resprout (Wright et al. 1979). Artemisia tridentata will re-establish relatively quickly (about 10-20 years) if a seed source is nearby (Bunting 1987). If fire-return intervals are more frequent than 10 years then Artemisia tridentata has difficulty recovering (Bunting 1987, Everett 1987). However, this association has an open, short-shrub canopy and a relatively sparse herbaceous layer (low fine fuels to carry the fire), so it is unlikely that it would burn except under extreme conditions. Adjacent Associations: Adjacent Association Comments: Other Comments: Description Author: K.A. Schulz Version: 14-Jan-2002 ELEMENT GLOBAL RANK & REASONS GRank: G4 GRank Review Date: 17-Dec-1999 GReasons: Although, this shrubland has only been describe from six locations in Grand Canyon National Park, Arizona, it is likely a widespread type that occurs elsewhere in the Colorado Plateau such as New Mexico and possibly Nevada. Stands in the park are protected from livestock grazing, but may be sensitive to overbrowsing by wildlife. Outside the park, excessive use by livestock or wildlife degrade stands. Fortunately, Artemisia tridentata and Bouteloua gracilis are fairly resilient to overgrazing. Increased fire frequency caused by abundance of fine fuels from introduced annual grasses such as Bromus rubens or Bromus tectorum may threaten these shrublands. More survey and classification work are needed to verify potential range distribution. Ranking Author: K.A. Schulz Version: 12-Oct-1999 ELEMENT DISTRIBUTION Range: This association is described from Zion and Grand Canyon national parks in southwestern Utah and northwestern Arizona. It is likely widespread across the Colorado Plateau and also may occur in New Mexico and Nevada. Nations: US Subnations: AZ:S3, UT TNC Ecoregions: 18:C, 19:C USFS Ecoregions: 313A:CC, M341C:CC Federal Lands: NPS (Grand Canyon, Zion) ELEMENT SOURCES References: Bourgeron and Engelking 1994, Bunting 1987, Cogan et al. 2004, Driscoll et al. 1984, Everett 1987, Jameson et al. 1962, Warren et al. 1982, Western Ecology Working Group n.d., Wright et al. 1979 CEGL000999–Artemisia tridentata / Chrysothamnus viscidiflorus / Poa secunda ShrublandBasin Big Sagebrush / Green Rabbitbrush / Curly Bluegrass Shrubland Classif. Resp.: West Classif. Level: Association Conf.: 2 - Moderate Stakeholders: West Status: Standard Origin: 26-Nov-1997 Concept Auth.: Concept Ref.: Western Ecology Working Group n.d. Ecological Systems: Inter-Mountain Basins Big Sagebrush Shrubland (CES304.777) ELEMENT CONCEPT Summary: Classification Comments: Similar Associations: Similar Association Comments: Related Concepts: Artemisia tridentata/Chrysothamnus viscidiflorus/Poa secunda (Bourgeron and Engelking 1994) = DRISCOLL FORMATION CODE:III.A.2.b. (Driscoll et al. 1984) B ELEMENT DESCRIPTION Environment: Vegetation: Dynamics: Adjacent Associations: Adjacent Association Comments: Other Comments: Description Author: Version: ELEMENT GLOBAL RANK & REASONS GRank: G5 GRank Review Date: 23-Feb-1994 GReasons: Ranking Author: Version: ELEMENT DISTRIBUTION Range: Nations: US Subnations: CA:S3, NV:S5, WY? TNC Ecoregions: 6:C, 11:C USFS Ecoregions: 341:C, 342B:CC Federal Lands: ELEMENT SOURCES References: Blackburn et al. 1968c, Blackburn et al. 1969a, Bourgeron and Engelking 1994, Driscoll et al. 1984, Western Ecology Working Group n.d. CEGL001001–Artemisia tridentata / Elymus elymoides ShrublandBasin Big Sagebrush / Bottlebrush Shrubland Classif. Resp.: West Classif. Level: Association Conf.: 3 - Weak Stakeholders: West Status: Standard Origin: 26-Nov-1997 Concept Auth.: Concept Ref.: Western Ecology Working Group n.d. Ecological Systems: Inter-Mountain Basins Big Sagebrush Shrubland (CES304.777) ELEMENT CONCEPT Summary: Classification Comments: Similar Associations: Artemisia tridentata Shrubland (CEGL000991) Similar Association Comments: Related Concepts: Artemisia tridentata/Elymus elymoides (Bourgeron and Engelking 1994) = DRISCOLL FORMATION CODE:III.A.2.b. (Driscoll et al. 1984) B ELEMENT DESCRIPTION Environment: Vegetation: Dynamics: Adjacent Associations: Adjacent Association Comments: Other Comments: Description Author: Version: ELEMENT GLOBAL RANK & REASONS GRank: G5? GRank Review Date: 23-Feb-1994 GReasons: Ranking Author: Version: ELEMENT DISTRIBUTION Range: Nations: US Subnations: NV:S5 TNC Ecoregions: 6:C, 11:C USFS Ecoregions: 341:C, 342B:CC, M341A:CC Federal Lands: ELEMENT SOURCES References: Bourgeron and Engelking 1994, Driscoll et al. 1984, Eddleman and Jaindl 1994, Savage 1968, Western Ecology Working Group n.d. CEGL000998–Artemisia tridentata / Ericameria nauseosa ShrublandBasin Big Sagebrush / Rubber Rabbitbrush Shrubland Classif. Resp.: West Classif. Level: Association Conf.: 2 - Moderate Stakeholders: West Status: Standard Origin: 26-Nov-1997 Concept Auth.: Concept Ref.: Western Ecology Working Group n.d. Ecological Systems: Inter-Mountain Basins Big Sagebrush Shrubland (CES304.777) ELEMENT CONCEPT Summary: Classification Comments: Similar Associations: Similar Association Comments: Related Concepts: Artemisia tridentata/Chrysothamnus nauseosus (Bourgeron and Engelking 1994) = DRISCOLL FORMATION CODE:III.A.2.b. (Driscoll et al. 1984) B ELEMENT DESCRIPTION Environment: Vegetation: Dynamics: Adjacent Associations: Adjacent Association Comments: Other Comments: Description Author: Version: ELEMENT GLOBAL RANK & REASONS GRank: G5 GRank Review Date: 23-Feb-1994 GReasons: Ranking Author: Version: ELEMENT DISTRIBUTION Range: Nations: US Subnations: CA:S4, NV:S5 TNC Ecoregions: 6:C, 11:C USFS Ecoregions: 341:C, 342B:CC Federal Lands: ELEMENT SOURCES References: Bourgeron and Engelking 1994, Driscoll et al. 1984, Fenemore 1970, Western Ecology Working Group n.d. CEGL001005–Artemisia tridentata / Pleuraphis jamesii ShrublandBasin Big Sagebrush / James' Galleta Shrubland Classif. Resp.: West Classif. Level: Association Conf.: 2 - Moderate Stakeholders: West Status: Standard Origin: 26-Nov-1997 Concept Auth.: Concept Ref.: Western Ecology Working Group n.d. Ecological Systems: Inter-Mountain Basins Big Sagebrush Shrubland (CES304.777) ELEMENT CONCEPT Summary: Classification Comments: Similar Associations: Similar Association Comments: Related Concepts: Artemisia tridentata/Hilaria jamesii (Bourgeron and Engelking 1994) = DRISCOLL FORMATION CODE:III.A.2.b. (Driscoll et al. 1984) B ELEMENT DESCRIPTION Environment: Vegetation: Dynamics: Adjacent Associations: Adjacent Association Comments: Other Comments: Description Author: Version: ELEMENT GLOBAL RANK & REASONS GRank: G5 GRank Review Date: 23-Feb-1994 GReasons: Ranking Author: Version: ELEMENT DISTRIBUTION Range: Nations: US Subnations: NV:S5 TNC Ecoregions: 6:C, 11:C USFS Ecoregions: 341:C, 342B:CC Federal Lands: ELEMENT SOURCES References: Bourgeron and Engelking 1994, Driscoll et al. 1984, Tueller et al. 1966, Western Ecology Working Group n.d. CEGL001012–Artemisia tridentata / Symphoricarpos longiflorus ShrublandBasin Big Sagebrush / Desert Snowberry Shrubland Classif. Resp.: West Classif. Level: Association Conf.: 2 - Moderate Stakeholders: West Status: Standard Origin: 26-Nov-1997 Concept Auth.: Concept Ref.: Western Ecology Working Group n.d. Ecological Systems: Inter-Mountain Basins Big Sagebrush Shrubland (CES304.777) ELEMENT CONCEPT Summary: Classification Comments: Similar Associations: Similar Association Comments: Related Concepts: Artemisia tridentata/Symphoricarpos longiflorus (Bourgeron and Engelking 1994) = DRISCOLL FORMATION CODE:III.A.2.b. (Driscoll et al. 1984) B ELEMENT DESCRIPTION Environment: Vegetation: Dynamics: Adjacent Associations: Adjacent Association Comments: Other Comments: Description Author: Version: ELEMENT GLOBAL RANK & REASONS GRank: G5 GRank Review Date: 23-Feb-1994 GReasons: Ranking Author: Version: ELEMENT DISTRIBUTION Range: Nations: US Subnations: CA:S2, NV:S5 TNC Ecoregions: 6:C USFS Ecoregions: 342B:CC Federal Lands: ELEMENT SOURCES References: Blackburn et al. 1971, Bourgeron and Engelking 1994, Driscoll et al. 1984, Heinze et al. 1962, Western Ecology Working Group n.d. CEGL000991–Artemisia tridentata ShrublandBasin Big Sagebrush Shrubland Classif. Resp.: West Classif. Level: Association Conf.: 3 - Weak Stakeholders: West Status: Standard Origin: 26-Nov-1997 Concept Auth.: K.A. Schulz Concept Ref.: Western Ecology Working Group n.d. Ecological Systems: Inter-Mountain Basins Big Sagebrush Shrubland (CES304.777) ELEMENT CONCEPT Summary: This broadly defined sagebrush shrubland is described from eastern California, Nevada, and Utah, but likely occurs throughout much of the western U.S. Elevations range from 1340-2225 m. Landforms include dunes, basins and slopes. Substrates are variable; soil texture ranges from sand to clay. This association is used to describe Artemisia tridentata-dominated shrublands where the subspecies is not known and the herbaceous layer is generally sparse. The herbaceous layer may be limited by substrate or disturbance. Stands in Utah and California had moderate cover (25-50%) of Artemisia tridentata often with scattered individuals of Ericameria nauseosa (= Chrysothamnus nauseosus), Sarcobatus vermiculatus, Grayia spinosa, Gutierrezia sarothrae, or Opuntia polyacantha. If present, the herbaceous layer typically consists of low cover of graminoids such as Distichlis spicata and Elymus elymoides. Classification Comments: This is a broadly defined, low-confidence association that could be split into several associations with more information. There are many associations defined for all subspecies of Artemisia tridentata. Leary and Peterson (1984) identified Artemisia tridentata in their stands to ssp. tridentata; however, their stands were almost pure Artemisia tridentata with little else to classify into a less general association. Similar Associations: Artemisia tridentata / Elymus elymoides Shrubland (CEGL001001) Artemisia tridentata ssp. tridentata / Distichlis spicata Shrubland (CEGL001000)—This is one of many similar Artemisia tridentata associations without variety of Artemisia tridentata specified. Similar Association Comments: Related Concepts: Artemisia tridentata (Bourgeron and Engelking 1994) = Artemisia tridentata Association (Leary and Peterson 1984) F Artemisia tridentata Vegetation Zone VIII (Ralston 1969) F DRISCOLL FORMATION CODE:III.A.2.b. (Driscoll et al. 1984) B ELEMENT DESCRIPTION Environment: This broadly defined sagebrush shrubland is reported from the Great Basin and Uinta Basin but is likely more widespread. Elevations range from 1340-2225 m. Landforms include dunes, basins and slopes. Substrates are variable; soil texture ranges from sand to clay. Vegetation: This broadly defined association is used to describe Artemisia tridentata-dominated shrublands where the subspecies is not known and the herbaceous layer is generally sparse. The herbaceous layer may be limited by substrate or disturbance. Stands in Utah and California had a moderately dense short-shrub layer (25-70%) dominated by Artemisia tridentata. Associated shrub species may codominate, but more typically occur as scattered individuals including Ericameria nauseosa (= Chrysothamnus nauseosus), Sarcobatus vermiculatus, Grayia spinosa, Gutierrezia sarothrae, or Opuntia polyacantha. If present, the herbaceous layer typically consists of low cover of graminoids such as Distichlis spicata and Elymus elymoides. Dynamics: Ecological processes vary among sites. Adjacent Associations: Adjacent Association Comments: Other Comments: Description Author: K.A. Schulz Version: 10-Jul-2001 ELEMENT GLOBAL RANK & REASONS GRank: G5? GRank Review Date: 23-Feb-1994 GReasons: Ranking Author: Version: 23-Feb-1994 ELEMENT DISTRIBUTION Range: This sagebrush shrubland is reported from eastern California, Nevada, and Utah, but likely occurs throughout much of the Intermountain West. Nations: US Subnations: CA:S5, NV:S5, UT TNC Ecoregions: 6:C, 10:C USFS Ecoregions: 341C:CC, 342B:CC Federal Lands: USFWS (Ouray) ELEMENT SOURCES References: Bourgeron and Engelking 1994, Driscoll et al. 1984, Leary and Peterson 1984, Ralston 1969, Western Ecology Working Group n.d. CEGL001013–Artemisia tridentata Upperzone Community ShrublandBasin Big Sagebrush Upperzone Community Shrubland Classif. Resp.: West Classif. Level: Association Conf.: 3 - Weak Stakeholders: West Status: Standard Origin: 26-Nov-1997 Concept Auth.: Concept Ref.: Western Ecology Working Group n.d. Ecological Systems: Inter-Mountain Basins Big Sagebrush Shrubland (CES304.777) Inter-Mountain Basins Montane Sagebrush Steppe (CES304.785) ELEMENT CONCEPT Summary: Classification Comments: Similar Associations: Similar Association Comments: Related Concepts: Artemisia tridentata (Upperzone Community) (Bourgeron and Engelking 1994) = DRISCOLL FORMATION CODE:III.A.2.b. (Driscoll et al. 1984) B ELEMENT DESCRIPTION Environment: Vegetation: Dynamics: Adjacent Associations: Adjacent Association Comments: Other Comments: Description Author: Version: ELEMENT GLOBAL RANK & REASONS GRank: G5? GRank Review Date: 23-Feb-1994 GReasons: Ranking Author: Version: ELEMENT DISTRIBUTION Range: Nations: US Subnations: CA?, NV:S5 TNC Ecoregions: USFS Ecoregions: 341:C, M341A:CC Federal Lands: ELEMENT SOURCES References: Bourgeron and Engelking 1994, Driscoll et al. 1984, Kurzius 1981, Western Ecology Working Group n.d. Directory: Docs Docs -> Application for acem Docs -> Observational Assessment of Teaching Practices Teaching Assessment Initiative Proposal Submitted to The Teachers for a New Era project Docs -> Traditional British values Docs -> From Warfighters to Crimefighters: The Origins of Domestic Police Militarization Docs -> Borzoi Club of America Register of Merit Program I. 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