Print Report
CEGL003971 Ostrya knowltonii Riparian Woodland
Type Concept Sentence: No Data Available
Common (Translated Scientific) Name: Knowlton''s Hophornbeam Riparian Woodland
Colloquial Name: No Data Available
Hierarchy Level: Association
Type Concept: This riparian woodland is characterized by a dense canopy of the small tree Ostrya knowltonii with up to 40% cover. Scattered trees may be present but do not constitute a tree layer. Associated shrubs include Amelanchier utahensis, Brickellia longifolia, Fraxinus anomala, Mahonia repens, Quercus gambelii, Rhus trilobata, Rubus neomexicanus, Symphoricarpos longiflorus, and Yucca angustissima, among others. The herbaceous layer is diverse and provides significant cover. Common grasses include Sporobolus airoides and Poa fendleriana, with Carex curatorum up to 30% cover in some stands, and forbs include Adiantum capillus-veneris, Aquilegia micrantha, Castilleja linariifolia, Cirsium calcareum, Cirsium rydbergii, Galium aparine, Heterotheca villosa, Mimulus eastwoodiae, Platanthera zothecina, Solidago canadensis, and Thelypodium integrifolium. This riparian woodland occurs on sideslopes, intermittently flooded alcoves, and wash bottoms. Soils are rapidly drained sands, loamy sands or loams derived from alluvium or colluvium. This Colorado Plateau association is known from Glen Canyon Recreational Area in southeastern Utah and Grand Canyon National Park in northern Arizona.
Diagnostic Characteristics: No Data Available
Rationale for Nominal Species or Physiognomic Features: No Data Available
Classification Comments: This association is largely known and described from National Park Service inventory efforts in the Colorado Plateau, and classification and data from John Spence, Ph.D., Chief Scientist and Terrestrial Natural Resources Branch Chief, Science & Resource Management, Glen Canyon National Recreation Area (Spence 2008).
Similar NVC Types: No Data Available
note: No Data Available
Physiognomy and Structure: No Data Available
Floristics: Total vegetation cover is 92%. Stand are characterized by a moderate to dense canopy of the tall shrub Ostrya knowltonii with 15-40% cover. Scattered Populus fremontii, Pinus edulis, Juniperus osteosperma, and Cercis orbiculata (= Cercis occidentalis var. orbiculata) emerge from the shrub canopy but do not constitute a tree layer. Associated shrubs include Amelanchier utahensis, Brickellia longifolia, Fendlera rupicola, Frangula betulifolia, Fraxinus anomala, Fraxinus cuspidata, Glossopetalon spinescens, Quercus gambelii, Ptelea trifoliata, Rhus trilobata, Symphoricarpos longiflorus, and Yucca angustissima. The riparian vine Clematis ligusticifolia provides sparse cover. The herbaceous layer is diverse and provides significant cover (up to 52%). Common grasses include Sporobolus airoides and Poa fendleriana, with Carex curatorum up to 30% cover in some stands, and forbs include Adiantum capillus-veneris, Aquilegia micrantha, Castilleja linariifolia, Cirsium calcareum, Heterotheca villosa, Solidago canadensis, and Thelypodium integrifolium.
Dynamics: No Data Available
Environmental Description: This riparian woodland occurs on sideslopes, intermittently flooded and permanently wet alcoves, and wash bottoms. Sites are on moderate slopes (10-14°) and between 1211 to 1750 m elevation. Bare soil and litter cover most of the unvegetated surface, with lesser cover by bedrock, large and small rocks, and dead wood. Soils are rapidly drained sands, loamy sands or sandy loams derived from alluvium or colluvium. When unobscured, the underlying bedrock is typically limestone or sandstone.
Geographic Range: This is a rare association occurring in the Colorado Plateau and is described from Glen Canyon National Recreation Area in southern Utah and Grand Canyon National Park in northwestern Arizona.
Nations: US
States/Provinces: AZ, UT
Plot Analysis Summary:
http://vegbank.org/natureserve/ELEMENT_GLOBAL.2.794110
Confidence Level: Low
Confidence Level Comments: No Data Available
Grank: GNR
Greasons: No Data Available
| Type | Name | Database Code | Classification Code |
|---|---|---|---|
| Class | 1 Forest & Woodland Class | C01 | 1 |
| Subclass | 1.B Temperate & Boreal Forest & Woodland Subclass | S15 | 1.B |
| Formation | 1.B.3 Temperate Flooded & Swamp Forest Formation | F026 | 1.B.3 |
| Division | 1.B.3.Nc Rocky Mountain-Great Basin Montane Flooded & Swamp Forest Division | D195 | 1.B.3.Nc |
| Macrogroup | 1.B.3.Nc.1 Engelmann Spruce - Narrowleaf Cottonwood / Red-osier Dogwood Riparian & Swamp Forest Macrogroup | M034 | 1.B.3.Nc.1 |
| Group | 1.B.3.Nc.1.a Engelmann Spruce - Blue Spruce - Narrowleaf Cottonwood Riparian & Swamp Forest Group | G506 | 1.B.3.Nc.1.a |
| Alliance | A4154 Box-elder - Thinleaf Alder - Red-osier Dogwood Riparian Woodland Alliance | A4154 | 1.B.3.Nc.1.a |
| Association | CEGL003971 Knowlton''s Hophornbeam Riparian Woodland | CEGL003971 | 1.B.3.Nc.1.a |
Concept Lineage: No Data Available
Predecessors: No Data Available
Obsolete Names: No Data Available
Obsolete Parents: No Data Available
Synonomy: = Ostrya knowltonii Riparian Woodland (Tendick et al. 2017)
- Kearsley, M. J. C., K. Green, M. Tukman, M. Reid, M. Hall, T. J. Ayers, and K. Christie. 2015. Grand Canyon National Park-Grand Canyon / Parashant National Monument vegetation classification and mapping project. Natural Resource Report NPS/GRCA/NRR--2015/913. National Park Service, Fort Collins, CO. 75 pp. plus appendices.
- Reid, M. S., and M. E. Hall. 2010. Vegetation classification of Grand Canyon National Park. Draft report submitted to National Park Service, Fort Collins, CO.
- Spence, J. R. 2008. Spring-supported vegetation along the Colorado River on the Colorado Plateau: Floristics, vegetation structure, and environment. Pages 185-210 in: L. E. Stevens and V. J. Meretsky, editors. Aridland Springs in North America: Ecology and Conservation. University of Arizona Press, Tucson.
- Tendick, A., J. Spence, M. Reid, K. Shulz, G. Kittel, K. Green, A. Wight, and G. Wakefield. 2017. Vegetation classification and mapping project report, Glen Canyon National Recreation Area and Rainbow Bridge National Monument. Natural Resource Report NPS/NCPN/NRR—2017/1500. National Park Service, Fort Collins, CO. 1464 pp.
- Western Ecology Working Group of NatureServe. No date. International Ecological Classification Standard: International Vegetation Classification. Terrestrial Vegetation. NatureServe, Boulder, CO.