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G822 Western Boreal Cliff, Scree & Rock Vegetation Group

Type Concept Sentence: This sparsely vegetated rock outcrop and cliff face macrogroup is found in the boreal regions of Alaska and adjacent Yukon Territory. Stands include patchy vegetated fractures in the rock surface and less steep or more stable slopes that are composed of scattered trees and/or shrubs. Mosses or lichens may be very dense, well-developed and display cover well over 10%.


Common (Translated Scientific) Name: Western Boreal Cliff, Scree & Rock Vegetation Group

Colloquial Name: Western Boreal Cliff, Scree & Rock Vegetation

Hierarchy Level:  Group

Type Concept: This sparsely vegetated rock outcrop and cliff face macrogroup is found in the boreal regions of Alaska and adjacent Yukon of. Stands include patchy vegetated fractures in the rock surface and less steep or more stable slopes that are composed of scattered trees and/or shrubs. Trees species include Pinus contorta, Tsuga spp., and Picea mariana. Mosses or lichens may be very dense, well-developed and display cover well over 10%.

Diagnostic Characteristics: No Data Available

Rationale for Nominal Species or Physiognomic Features: No Data Available

Classification Comments: Insufficient information is available to describe this group. Currently its concept is arbitrarily limited to the boreal forests of Alaska and adjacent Yukon Territory, more or less following the range of boreal forest macrogroup concepts.

Similar NVC Types: No Data Available
note: No Data Available

Physiognomy and Structure: No Data Available

Floristics: No Data Available

Dynamics:  No Data Available

Environmental Description:  No Data Available

Geographic Range: This sparsely vegetated rock outcrop and cliff face macrogroup is found in the boreal regions of Alaska and adjacent Yukon Territory.

Nations: CA,US

States/Provinces:  AK, YT




Confidence Level: Moderate

Confidence Level Comments: No Data Available

Grank: GNR

Greasons: No Data Available


Concept Lineage: No Data Available

Predecessors: No Data Available

Obsolete Names: No Data Available

Obsolete Parents: No Data Available

Synonomy: No Data Available

Concept Author(s): D. Faber-Langendoen, in Faber-Langendoen et al. (2015)

Author of Description: D. Faber-Langendoen

Acknowledgements: No Data Available

Version Date: 03-29-17

  • Faber-Langendoen, D., J. Drake, S. Gawler, M. Hall, C. Josse, G. Kittel, S. Menard, C. Nordman, M. Pyne, M. Reid, L. Sneddon, K. Schulz, J. Teague, M. Russo, K. Snow, and P. Comer, editors. 2010-2019a. Divisions, Macrogroups and Groups for the Revised U.S. National Vegetation Classification. NatureServe, Arlington, VA. plus appendices. [in preparation]
  • Viereck, L. A., C. T. Dyrness, A. R. Batten, and K. J. Wenzlick. 1992. The Alaska vegetation classification. General Technical Report PNW-GTR286. USDA Forest Service, Pacific Northwest Research Station, Portland, OR. 278 pp.