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CEGL005978 Populus fremontii / Scour Riparian Forest
Type Concept Sentence: No Data Available
Common (Translated Scientific) Name: Fremont Cottonwood / Scour Riparian Forest
Colloquial Name: No Data Available
Hierarchy Level: Association
Type Concept: This association is known from the Gila River, San Francisco River and Colorado River watersheds, and is likely to occur elsewhere in southwestern U.S. This type is characterized by open to dense, young regeneration stands of Populus fremontii. A variety of other trees and shrubs may be present, but with low cover. As the name implies, these are recently established young stands on newly exposed sands and gravels, meaning that the vegetation has not had time to develop or the herbaceous layer has been buried under recent deposition. The vegetation structure is overstory tree canopy with very little shrub or herb cover with mostly bare ground. Scattered shrubs and herbs can often be found; however, their species composition is not characteristic of this association. Ericameria nauseosa, Rhus aromatica, Purshia stansburiana, Salix exigua, and Baccharis salicifolia are common shrubs but not abundant. Forbs and grasses are scattered and variously represented by a suite of wetland indicators that may include Cyperus esculentus, Echinochloa crus-galli, Juncus arcticus ssp. littoralis, Polypogon monspeliensis, Polypogon viridis, Schoenoplectus pungens, Schoenoplectus tabernaemontani, Equisetum arvense, Polygonum lapathifolium, Rorippa sphaerocarpa, and Veronica americana. This early- to mid-successional forest association is found within the floodplain of large lowland valleys at elevations ranging from 1111 to 1640 m (3600-5370 feet). Stands occur on low bars or riverwash within the active channel. Sites are seasonally flooded, scouring away much of the undergrowth. Soils are either sandy, moist, weakly developed Entisols (Sandy Aquic Ustipsamments) or riverwash composed of non-cohesive and unconsolidated deposits of sands, gravels, or cobbles.
Diagnostic Characteristics: No Data Available
Rationale for Nominal Species or Physiognomic Features: No Data Available
Classification Comments: The northern extent of this association is largely known and described from National Park Service inventory efforts in the Colorado Plateau. This type may represent a younger stage of the Populus fremontii - Salix gooddingii / Baccharis salicifolia CT (New Mexico state type). It should not be confused with ~Populus fremontii / Sparse Riparian Forest (CEGL005979)$$ of high terraces at the edge of floodplains that are rarely flooded.
Similar NVC Types: No Data Available
note: No Data Available
Physiognomy and Structure: No Data Available
Floristics: This type is characterized by open to dense, young regeneration stands of Populus fremontii. A variety of other trees and shrubs may be present, but with low cover. As the name implies, these are recently established young stands on newly exposed sands and gravels. Acer negundo and Ostrya knowltonii trees may be present with sparse to low covered. Shrub species that may be present include Ericameria nauseosa, Rhus aromatica, Purshia stansburiana, Salix exigua, and Baccharis salicifolia which are common but not abundant. Forbs and grasses are scattered and variously represented by a suite of wetland indicators that may include Cyperus esculentus, Echinochloa crus-galli, Juncus arcticus ssp. littoralis (= Juncus balticus), Polypogon monspeliensis, Polypogon viridis, Schoenoplectus pungens, Schoenoplectus tabernaemontani, Equisetum arvense, Polygonum lapathifolium, Rorippa sphaerocarpa, Veronica americana, Oxytenia acerosa, Sporobolus airoides, and Artemisia ludoviciana.
Dynamics: No Data Available
Environmental Description: This riparian forest association occurs on intermittently flooded to annually flooded low-lying areas such as canyon bottoms, and drainage channels and overflow channels of larger river bottoms. Stands are found within the floodplain of large lowland valleys at elevations ranging from 1111 to 1640 m (3600-5370 feet), and occur on low bars or riverwash within the active channel. Sites are seasonally flooded, scouring away much of the undergrowth. Soils are either sandy, moist, weakly developed Entisols (Sandy Aquic Ustipsamments) or riverwash composed of non-cohesive and unconsolidated deposits of sands, gravels, or cobbles.
Geographic Range: This association is found along the Gila and San Francisco rivers (Catron and Grant counties, New Mexico) and the Colorado River basin in southern Utah, and likely probably elsewhere in the southwestern U.S.
Nations: US
States/Provinces: AZ?, NM, UT
Plot Analysis Summary:
http://vegbank.org/natureserve/ELEMENT_GLOBAL.2.737514
Confidence Level: Low - Poorly Documented
Confidence Level Comments: No Data Available
Grank: G3
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.Nd Western North American Interior Flooded Forest Division | D013 | 1.B.3.Nd |
| Macrogroup | 1.B.3.Nd.2 Interior Warm & Cool Desert Riparian Forest Macrogroup | M036 | 1.B.3.Nd.2 |
| Group | 1.B.3.Nd.2.b Western Interior Riparian Forest & Woodland Group | G797 | 1.B.3.Nd.2.b |
| Alliance | A3803 Fremont Cottonwood - Velvet Ash - Goodding''s Willow Riparian Forest & Woodland Alliance | A3803 | 1.B.3.Nd.2.b |
| Association | CEGL005978 Fremont Cottonwood / Scour Riparian Forest | CEGL005978 | 1.B.3.Nd.2.b |
Concept Lineage: No Data Available
Predecessors: No Data Available
Obsolete Names: No Data Available
Obsolete Parents: No Data Available
Synonomy: = Fremont Cottonwood/Scour CT (Muldavin et al. 2000a)
- Muldavin, E., P. Durkin, M. Bradley, M. Stuever, and P. Mehlhop. 2000a. Handbook of wetland vegetation communities of New Mexico. Volume I: Classification and community descriptions. Final report to the New Mexico Environment Department and the Environmental Protection Agency prepared by the New Mexico Natural Heritage Program, University of New Mexico, Albuquerque.
- NHNM [Natural Heritage New Mexico]. No date. Unpublished data on file. Natural Heritage New Mexico, University of New Mexico, Albuquerque.
- 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.