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Artemisia cana ssp. bolanderi / Muhlenbergia richardsonis Wet Shrub Meadow
Translated Name: Bolander's Silver Sagebrush / Mat Muhly Wet Shrub Meadow
Unique Identifier: CEGL001743
Classification Approach: International Vegetation Classification (IVC)
Summary: This association occurs on playa bottoms and on moist sites in valley bottoms in the northern Great Basin of southeastern Oregon, northwestern California, extreme southwestern Idaho and northeastern Nevada. It ranges between thick shrublands to open grasslands with scattered shrubs. It has only been described from arid, closed basins, although generally in areas with sufficient freshwater input to allow Artemisia cana to grow. All stands are in vernally wet areas, with the characteristics of intermountain vernal pools. Artemisia cana ssp. bolanderi dominates the shrub layer of all sites, generally as the only shrub present. Artemisia tridentata or less frequently Sarcobatus vermiculatus are occasionally found in stands, generally occurring at the margins of the communities. Artemisia cana ssp. bolanderi cover ranges from 5-60%, so that this type can be found as grasslands with shrubs, steppe and most commonly as shrublands. The perennial grass Muhlenbergia richardsonis comprises most of the understory. Occasionally, Puccinellia spp., Elymus spp., Poa secunda, Juncus nevadensis, Juncus effusus, or Eleocharis spp. are present. Often, Muhlenbergia richardsonis forms a solid, short mat across the stands, although in dry years or drier locations, alkaline playa (bare ground) makes up to 40% of the cover.



Classification

Classification Confidence: Low
Classification Comments: The successional status of this association is not clear, since Muhlenbergia richardsonis tends to increase with grazing. However, at least two stands are from areas that are rarely grazed by cattle.

Vegetation Hierarchy
Class 2 - Shrub & Herb Vegetation
Subclass 2.C - Shrub & Herb Wetland
Formation 2.C.4 - Temperate to Polar Freshwater Marsh, Wet Meadow & Shrubland
Division 2.C.4.Nb - Western North American Temperate & Boreal Freshwater Marsh, Wet Meadow & Shrubland
Macrogroup Western North American Montane-Subalpine-Boreal Marsh, Wet Meadow & Shrubland
Group Rocky Mountain-Great Basin Lowland-Foothill Riparian Shrubland
Alliance Silver Sagebrush Wet Shrubland

This is the revised vegetation hierarchy. For more information see Classification Sources and usnvc.org.



Related Concepts from Other Classifications

Related Subnational Community Units
These data are subject to substantial ongoing revision and may be out of date for some states.
In the U.S., contact the state Heritage Program for the most complete and up-to-date information at: http://www.natureserve.org/natureserve-network.
Information from programs in other jurisdictions will be posted when they are made available.
Subnation Concept Name Relationship to Standard Confidence Reference
Idaho Artemisia cana/Muhlenbergia richardsonis Equivalent Certain IDCDC 2005
Oregon Artemisia cana / Muhlenbergia richardsonis Equivalent Certain Kagan et al. 2004


Other Related Concepts
Related Concept Name: Artemisia cana / Muhlenbergia richardsonis
Relationship: = - Equivalent
Reference: Moseley, R. K. 1998. Riparian and wetland community inventory of 14 reference areas in southwestern Idaho. Technical Bulletin 98-5. USDI Bureau of Land Management, Boise State Office, Boise, ID. 52 pp.
Relationship: ? - Undetermined
Reference: Franklin, J. F., and C. T. Dyrness. 1973. Natural vegetation of Oregon and Washington. General Technical Report PNW-8. USDA Forest Service, Pacific Northwest Forest and Range Experiment Station, Portland, OR. 417 pp.
Related Concept Name: Artemisia cana / Muhlenbergia richardsonis Ecosystem
Relationship: = - Equivalent
Reference: Dealy, J. E. 1971. Habitat characteristics of the Silver Lake mule deer range. Research Paper PNW-125. USDA Forest Service, Pacific Northwest Forest and Range Experiment Station, Portland, OR. 99 pp.
Related Concept Name: Artemisia cana bolanderi / Muhlenbergia richardsonis Habitat Type
Relationship: = - Equivalent
Reference: Hironaka, M., M. A. Fosberg, and A. H. Winward. 1983. Sagebrush-grass habitat types of southern Idaho. Forestry, Wildlife, and Range Experiment Station Bulletin No. 15, University of Idaho, Moscow. 44 pp.
Related Concept Name: Artemisia cana/Muhlenbergia richardsonis
Relationship: = - Equivalent
Reference: Bourgeron, P. S., and L. D. Engelking, editors. 1994. A preliminary vegetation classification of the western United States. Unpublished report. The Nature Conservancy, Western Heritage Task Force, Boulder, CO. 175 pp. plus appendix.

Ecological Systems Placement

Ecological Systems Placement
Ecological System Unique ID Ecological System Name
CES304.084 Columbia Plateau Silver Sagebrush Seasonally Flooded Shrub-Steppe


NatureServe Conservation Status
Global Status: G3 (21Oct2002)
Rounded Global Status: G3 - Vulnerable
Reasons: This association is somewhat restricted, occurring in small, isolated stands along the northwestern edge of the northern Great Basin. These are seasonal wetlands, but generally are not recognized as wetland habitats. Only one site is known to be protected, and most occur in a matrix of Artemisia tridentata ssp. wyomingensis steppe. It is likely that a number of occurrences have been converted to agriculture. These areas are often heavily grazed, although the stands are fairly robust and recover fairly quickly from disturbance. Given their limited occurrences and the small size of most occurrences, it would be considered a G2 type if it was more threatened. However, as most remaining sites appear stable, threats are low enough, and it may be more abundant than it appears, this should remain a G3 for now.

Distribution
Color legend for Distribution Map
United States Distribution: CA, ID, NV, OR
Global Distribution: United States
Global Range: This is a very local, but fairly widespread type. Currently, the type is only known from widely distributed parts of the northern Great Basin and the Snake River Plains in Oregon, Idaho, Nevada and California.

U.S. Forest Service Ecoregions
Domain Name: Dry Domain
Division Name: Temperate Desert Division
Province Name: Intermountain Semi-Desert Province
Province Code: 342 Occurrence Status: Confident or certain
Section Name: Northwestern Basin and Range Section
Section Code: 342B Occurrence Status: Confident or certain
Section Name: Owyhee Uplands Section
Section Code: 342C Occurrence Status: Confident or certain
Section Name: Snake River Basalts Section
Section Code: 342D Occurrence Status: Confident or certain


Vegetation


Vegetation Composition (incomplete)
Species Name Rounded Global Status Growth Form Stratum Charact-
eristic
Dominant Constant
Cover Class %
Con-
stancy
%
Artemisia cana ssp. bolanderi G3 Broad-leaved evergreen shrub Short shrub/sapling  
 
 
Muhlenbergia richardsonis G3 Graminoid Herb (field)  
 
 


At-Risk Species Reported for this Association
Scientific Name
  (Common Name)
NatureServe Global Status U.S. Endangered Species Act Status
Artemisia cana ssp. bolanderi
  (Bolander's Silver Sagebrush)
G5T3?  


Environmental Setting

Wetland Indicator: Y


Dynamic Processes


Plot Sampling & Classification Analysis

Plots stored in VegBank


Authors/Contributors
Concept Author(s): J. Kagan
Element Description Edition Date: 26Nov1997
Element Description Author(s): J. Kagan
NatureServe Conservation Status Factors Edition Date: 21Oct2002
NatureServe Conservation Status Factors Author(s): J. Kagan

Ecological data developed by NatureServe and its network of natural heritage programs (see Local Programs) and other contributors and cooperators (see Sources).


References
  • Bourgeron, P. S., and L. D. Engelking, editors. 1994. A preliminary vegetation classification of the western United States. Unpublished report. The Nature Conservancy, Western Heritage Task Force, Boulder, CO. 175 pp. plus appendix.

  • Dealy, J. E. 1971. Habitat characteristics of the Silver Lake mule deer range. Research Paper PNW-125. USDA Forest Service, Pacific Northwest Forest and Range Experiment Station, Portland, OR. 99 pp.

  • Driscoll, R. S., D. L. Merkel, D. L. Radloff, D. E. Snyder, and J. S. Hagihara. 1984. An ecological land classification framework for the United States. Miscellaneous Publication No. 1439. USDA Forest Service, Washington, DC. 56 pp.

  • Franklin, J. F., and C. T. Dyrness. 1973. Natural vegetation of Oregon and Washington. General Technical Report PNW-8. USDA Forest Service, Pacific Northwest Forest and Range Experiment Station, Portland, OR. 417 pp.

  • Hironaka, M., M. A. Fosberg, and A. H. Winward. 1983. Sagebrush-grass habitat types of southern Idaho. Forestry, Wildlife, and Range Experiment Station Bulletin No. 15, University of Idaho, Moscow. 44 pp.

  • IDCDC [Idaho Conservation Data Center]. 2005. Wetland and riparian plant associations in Idaho. Idaho Conservation Data Center, Idaho Department of Fish and Game, Boise. [http://fishandgame.idaho.gov/tech/CDC/ecology/wetland_riparian_assoc.cfm] (accessed 14 June 2005).

  • Kagan, J. S., J. A. Christy, M. P. Murray, and J. A. Titus. 2000-2004. Classification of native vegetation of Oregon. Oregon Natural Heritage Program, Portland. 63 pp.

  • Manning, M. E., and W. G. Padgett. 1991. Riparian community type classification for the Humboldt and Toiyabe national forests, Nevada and eastern California. Unpublished draft report prepared for USDA Forest Service, Intermountain Region Ecology and Classification Program, Ogden, UT. 490 pp.

  • Moseley, R. K. 1998. Riparian and wetland community inventory of 14 reference areas in southwestern Idaho. Technical Bulletin 98-5. USDI Bureau of Land Management, Boise State Office, Boise, ID. 52 pp.

  • Western Ecology Working Group of NatureServe. No date. International Ecological Classification Standard: International Vegetation Classification. Terrestrial Vegetation. NatureServe, Boulder, CO.


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