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Alnus incana / Ribes (inerme, hudsonianum, lacustre) Wet Shrubland
Translated Name: Gray Alder / (White-stem Gooseberry, Northern Black Currant, Prickly Currant) Wet Shrubland
Unique Identifier: CEGL001151
Classification Approach: International Vegetation Classification (IVC)
Summary: This association is known from western Wyoming to eastern Oregon at moderate to high elevations of 1160-2045 m (3800-6700 feet). The community occupies narrow V-shaped valleys as stringers along moderate- to high-gradient perennial streams. Stands are flooded in the spring, and water tables drop to 50 cm below the surface through the growing season. Alnus incana, Alnus viridis ssp. sinuata, or Cornus sericea create a dense overstory that may form a canopy over stream channels. The lower shrub stratum is mostly dominated by Ribes hudsonianum, though Ribes inerme and Ribes lacustre may also be present. Herbaceous cover is variable.



Classification

Classification Confidence: Low - Poorly Documented
Classification Comments: This association is defined as a PNV vegetation type. This plant association was originally described by Youngblood et al. (1985a) in eastern Idaho and western Wyoming. It includes Crowe and Clausnitzer's (1997) Alnus incana - Ribes spp. - Mesic graminoid types.

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 Marsh, Wet Meadow & Shrubland
Group Western Montane-Subalpine Riparian & Seep Shrubland
Alliance Western Alder 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These data are subject to substantial ongoing revision and may be out of date for some states.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 Alnus incana / Ribes (inerme, hudsonianum, lacustre) Shrubland Equivalent Certain IDCDC 2005
Oregon Alnus incana / Ribes (hudsonianum - lacustre) Equivalent Certain Kagan et al. 2004
Wyoming Alnus incana / Ribes (inerme, hudsonianum, lacustre) Shrubland Equivalent Certain WNDD unpubl. data


Other Related Concepts
Related Concept Name: Alnus incana - Ribes lacustre - Ribes hudsonianum Association
Relationship: = - Equivalent
Reference: Crowe, E. A., B. L. Kovalchik, and M. J. Kerr. 2004. Riparian and wetland vegetation of central and eastern Oregon. Oregon Natural Heritage Information Center, Institute for Natural Resources, Oregon State University, Portland. 473 pp. [http://oregonstate.edu/ornhic/ publications.html]
Related Concept Name: Alnus incana - Ribes spp. / Mesic Forb
Relationship: = - Equivalent
Reference: Crowe, E. A., and R. R. Clausnitzer. 1997. Mid-montane wetland plant associations of the Malheur, Umatilla, and Wallowa-Whitman national forests. Technical Paper R6-NR-ECOL-TP-22-97. USDA Forest Service, Pacific Northwest Region, Portland, OR.

Ecological Systems Placement

Ecological Systems Placement
Ecological System Unique ID Ecological System Name
CES306.832 Rocky Mountain Subalpine-Montane Riparian Shrubland


NatureServe Conservation Status
Global Status: G3 (13Oct2000)
Rounded Global Status: G3 - Vulnerable
Reasons: Stands of this shrubland association are restricted to small patches (1-10 acres) in narrow valley bottoms in western Wyoming, southern Idaho and eastern Oregon. High-quality examples of this association without non-native species are uncommon as most stands are within watersheds with numerous threats including improper livestock grazing, logging, hydrologic alteration, and road building that may introduce non-native species and increase stream sedimentation.

Distribution
Color legend for Distribution Map
United States Distribution: ID, OR, WA, WYpotentially occurs
Canadian Province Distribution: BCpotentially occurs
Global Distribution: Canadapotentially occurs, United States
Global Range: Known range extends from western Wyoming to eastern Oregon.

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: Snake River Basalts Section
Section Code: 342D Occurrence Status: Confident or certain
Division Name: Temperate Steppe Regime Mountains
Province Name: Southern Rocky Mountain Steppe - Open Woodland - Coniferous Forest - Alpine Meadow Province
Province Code: M331 Occurrence Status: Confident or certain
Section Name: Yellowstone Highlands Section
Section Code: M331A Occurrence Status: Confident or certain
Section Name: Overthrust Mountains Section
Section Code: M331D Occurrence Status: Confident or certain
Province Name: Middle Rocky Mountain Steppe - Coniferous Forest - Alpine Meadow Province
Province Code: M332 Occurrence Status: Confident or certain
Section Name: Idaho Batholith Section
Section Code: M332A Occurrence Status: Confident or certain
Section Name: Beaverhead Mountains Section
Section Code: M332E Occurrence Status: Confident or certain
Section Name: Challis Volcanics Section
Section Code: M332F Occurrence Status: Confident or certain


Vegetation

Vegetation Summary: Alnus incana, Alnus viridis ssp. sinuata (= Alnus sinuata), or Cornus sericea create a dense overstory that may form a canopy over stream channels. The lower shrub stratum is mostly dominated by Ribes hudsonianum, though Ribes inerme and Ribes lacustre may also be present. Herbaceous cover is variable.

Vegetation Composition (incomplete)
Species Name Rounded Global Status Growth Form Stratum Charact-
eristic
Dominant Constant
Cover Class %
Con-
stancy
%
Alnus incana G3 Broad-leaved deciduous shrub Tall shrub/sapling  
 
 
Ribes hudsonianum G3 Broad-leaved deciduous shrub Short shrub/sapling  
 
 
Ribes inerme G3 Broad-leaved deciduous shrub Short shrub/sapling  
 
 
Ribes lacustre G3 Broad-leaved deciduous shrub Short shrub/sapling  
 
 


Environmental Setting

Wetland Indicator: Y
Environmental Summary: This association is known from western Wyoming to eastern Oregon at moderate to high elevations of 1160-2045 m (3800-6700 feet). The community occupies narrow V-shaped valleys as stringers along moderate- to high-gradient perennial streams. Stands are flooded in the spring, and water tables drop to 50 cm below the surface through the growing season.


Dynamic Processes


Plot Sampling & Classification Analysis

Plots stored in VegBank


Authors/Contributors
Concept Author(s): M. Jankovsky-Jones
Element Description Edition Date: 26Nov1997
Element Description Author(s): M. Jankovsky-Jones
NatureServe Conservation Status Factors Edition Date: 13Oct2000
NatureServe Conservation Status Factors Author(s): M. Jankovsky-Jones

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.

  • Crowe, E. A., B. L. Kovalchik, and M. J. Kerr. 2004. Riparian and wetland vegetation of central and eastern Oregon. Oregon Natural Heritage Information Center, Institute for Natural Resources, Oregon State University, Portland. 473 pp. [http://oregonstate.edu/ornhic/ publications.html]

  • Crowe, E. A., and R. R. Clausnitzer. 1997. Mid-montane wetland plant associations of the Malheur, Umatilla, and Wallowa-Whitman national forests. Technical Paper R6-NR-ECOL-TP-22-97. USDA Forest Service, Pacific Northwest Region, Portland, OR.

  • 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).

  • Jones, G. 1992b. Wyoming plant community classification (Draft). Wyoming Natural Diversity Database, Laramie, WY. 183 pp.

  • Kagan, J. S., J. A. Christy, M. P. Murray, and J. A. Titus. 2004. Classification of native vegetation of Oregon. January 2004. Oregon Natural Heritage Information Center, Portland. 52 pp.

  • WNDD [Wyoming Natural Diversity Database]. No date. Unpublished data on file. Wyoming Natural Diversity Database, University of Wyoming, Laramie, WY.

  • WNHP [Washington Natural Heritage Program]. 2018. Unpublished data files. Washington Natural Heritage Program, Department of Natural Resources, Olympia, WA.

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

  • Youngblood, A. P., W. G. Padgett, and A. H. Winward. 1985a. Riparian community type classification of eastern Idaho-western Wyoming. R4-Ecol-85-01. USDA Forest Service, Intermountain Region, Ogden, UT. 78 pp.


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Data last updated: March 2019