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F033 Cool Semi-Desert Scrub & Grassland Formation
Type Concept Sentence: Cool Semi-Desert Scrub & Grassland occurs in dry, cool-temperate climates, at mid-latitudes (35° to 50°N), typically in the interior of continents.
Common (Translated Scientific) Name: Cool Semi-Desert Scrub & Grassland Formation
Colloquial Name: Cool Semi-Desert Scrub & Grassland
Hierarchy Level: Formation
Type Concept: Cool Semi-Desert Scrub & Grassland occurs in dry, cool-temperate climates. Vegetation is dominated by microphyllous-leaved xeromorphic shrubs and grasses. Structure consists of typically low shrubs or graminoids and varies from open grassland and shrub-steppe to shrubland. Vegetation is not as limited by substrates as by drought and fires.
Diagnostic Characteristics: Vegetation is dominated by microphyllous-leaved xeromorphic shrubs. Structure consists of typically low shrubs or graminoids and varies from open grassland and shrub-steppe to shrubland.
Rationale for Nominal Species or Physiognomic Features: No Data Available
Classification Comments: The gradation in growth forms between 2.B ~Temperate & Boreal Grassland & Shrubland Subclass (S18)$$ and 3.B ~Cool Semi-Desert Scrub & Grassland Subclass (S11)$$ makes delimiting the concept a challenge. For example, in North America, microphyllous sagebrush shrubs may be common in parts of the western Great Plains, comparable to sagebrush types in the Great Basin.
Also montane cool semi-desert, in which the temperatures are more strongly hot/cold, may resemble cryomorphic vegetation. For example, the Salar de Uyuni in southwestern Bolivia is the world''s largest salt flat at 10,582 square kilometers (4086 square miles), near the crest of the Andes, at 3656 m (11,995 feet) elevation, and contains both xeromorphic and cryomorphic characteristics (C. Josse pers. comm. 2011).
Also montane cool semi-desert, in which the temperatures are more strongly hot/cold, may resemble cryomorphic vegetation. For example, the Salar de Uyuni in southwestern Bolivia is the world''s largest salt flat at 10,582 square kilometers (4086 square miles), near the crest of the Andes, at 3656 m (11,995 feet) elevation, and contains both xeromorphic and cryomorphic characteristics (C. Josse pers. comm. 2011).
Similar NVC Types: No Data Available
note: No Data Available
Physiognomy and Structure: The vegetation is dominated by microphyllous-leaved xeromorphic shrubs and grasses. Structure consists of typically low shrubs or graminoids and varies from open grassland and shrub-steppe to shrubland. Vegetation not as much limited by substrates as by drought and fires (Whittaker 1975).
Floristics: No Data Available
Dynamics: No Data Available
Environmental Description: Climate: This type occurs in dry, cool-temperate climates, typically in the interior of continents (Quinn 2009).
Geographic Range: This formation occupies extensive landscapes of the Great Basin of the western United States, central Asia and Iran, in South America (Patagonia and the Andes) and parts of Australia (Whittaker 1975).
Nations: AU,CA,MX,US
States/Provinces: No Data Available
Plot Analysis Summary:
http://vegbank.org/natureserve/ELEMENT_GLOBAL.2.860250
Confidence Level: Moderate
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.B Cool Semi-Desert Scrub & Grassland Subclass | S11 | 3.B |
| Formation | 3.B.1 Cool Semi-Desert Scrub & Grassland Formation | F033 | 3.B.1 |
| Division | 3.B.1.Ne Western North American Cool Semi-Desert Scrub & Grassland Division | D040 | 3.B.1.Ne |
Concept Lineage: No Data Available
Predecessors: No Data Available
Obsolete Names: No Data Available
Obsolete Parents: No Data Available
Synonomy: = Cold Deserts (Quinn 2009)
= Cool-temperate semi-desert scrub: biome-type 18 (Whittaker 1975)
= Cool-temperate semi-desert scrub: biome-type 18 (Whittaker 1975)
- Faber-Langendoen, D., T. Keeler-Wolf, D. Meidinger, C. Josse, A. Weakley, D. Tart, G. Navarro, B. Hoagland, S. Ponomarenko, J.-P. Saucier, G. Fults, and E. Helmer. 2015c. Classification and description of world formation types. General Technical Report RMRS-GTR-000. USDA Forest Service, Rocky Mountain Research Station, Fort Collins, CO.
- Josse, Carmen. Personal communication. Senior Ecologist, Latin America. NatureServe, Arlington, VA.
- Quinn, J. A. 2009. Desert biomes. Greenwood Press, Westport, CT.
- Whittaker, R. H. 1975. Communities and ecosystems. Second edition. Macmillan Publishing Co., New York. 387 pp.