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CEGL002946 Populus fremontii / Baccharis (emoryi, salicina) Riparian Woodland
Type Concept Sentence: No Data Available
Common (Translated Scientific) Name: Fremont Cottonwood / (Emory''s Baccharis, Willow Baccharis) Riparian Woodland
Colloquial Name: No Data Available
Hierarchy Level: Association
Type Concept: This Fremont cottonwood woodland association occurs in riparian areas in the Colorado Plateau and Mojave Desert of Arizona, California and Utah. This association is characterized by an open to moderately dense tree canopy solely dominated by Populus fremontii (15-35%). The understory is a distinct shrub layer consisting mostly of Baccharis emoryi and/or Baccharis salicina often with Salix exigua. Other small trees or shrubs may be present with low cover such as Cercis orbiculata, Fallugia paradoxa, Purshia stansburiana, and Salix gooddingii. Brickellia longifolia, Chrysothamnus linifolius, Pluchea sericea, and exotic Tamarix spp. may also be present. If present, herbaceous cover is generally low (<10% cover) and is composed of wetland graminoid species such as Phragmites australis, Cladium californicum, Imperata brevifolia, and Muhlenbergia asperifolia. Forb cover averages about 2% and includes species such as Typha spp., Oenothera elata, and Artemisia ludoviciana; Equisetum hyemale may occur as well. Stands occur on flat canyon bottoms, benches, floodplains, and along intermittent streams, between 725 to 1200 m (2325-5175 feet) elevation on gently sloping drainage channels on low levels and interfluves. Soils are poorly drained to rapidly drained sands and sandy loams derived from various parent materials that are commonly obscured by the soil. Ground cover is mostly litter, surface rocks and bare soil. This is a riparian vegetation type and is restricted to areas with perennial creeks and/or reliable springs and seeps.
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.
Similar NVC Types: No Data Available
note: No Data Available
Physiognomy and Structure: No Data Available
Floristics: This association is somewhat variable depending on site conditions, but always has a tree canopy comprised almost exclusively of Populus fremontii (15-35%) (Reid and Hall 2010). Beneath the tree canopy is a well-defined tall-shrub layer consisting mostly of Baccharis emoryi and/or Baccharis salicina often with Salix exigua. Other tall shrubs may be present with low cover, such as Cercis orbiculata, Fallugia paradoxa, Purshia stansburiana, and Salix gooddingii. Brickellia longifolia, Chrysothamnus linifolius, Pluchea sericea, and exotic Tamarix spp. may also be present. If present, herbaceous cover is generally low (<10% cover) and is composed of wetland graminoid species such as Phragmites australis, Cladium californicum, Imperata brevifolia, and Muhlenbergia asperifolia. Forb cover averages about 2% and includes species such as Typha spp., Oenothera elata, and Artemisia ludoviciana; Equisetum hyemale occurs in some stands as well. The undulating terrain in drainages and interfluves is capable of supporting xeric understory species as well, including Aristida purpurea, Achnatherum speciosum, and Datura wrightii.
Dynamics: No Data Available
Environmental Description: This Fremont cottonwood woodland association occurs on flat canyon bottoms, benches, floodplains, and along intermittent streams, between 725 to 1200 m (2325-5175 feet) elevation on gently sloping drainage channels on low levels and interfluves (Reid and Hall 2010). Soils are poorly drained to rapidly drained sands and sandy loams derived from various parent materials that are commonly obscured by the soil. Ground cover is mostly by litter, surface rocks and bare soil. This is a riparian vegetation type and is restricted to areas with perennial creeks and/or reliable springs and seeps.
Geographic Range: This association has been described from Grand Canyon and Zion national parks and Glen Canyon National Recreation Area in southern Utah and northern Arizona, and from Death Valley National Park in California.
Nations: US
States/Provinces: AZ, CA, UT
Plot Analysis Summary:
http://vegbank.org/natureserve/ELEMENT_GLOBAL.2.687864
Confidence Level: Low - Poorly Documented
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.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 | CEGL002946 Fremont Cottonwood / (Emory''s Baccharis, Willow Baccharis) Riparian Woodland | CEGL002946 | 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: = Populus fremontii / Baccharis emoryi Association (Evens et al. 2014)
= Populus fremontii / Baccharis emoryi Woodland [Provisional] (Cogan et al. 2004)
= Populus fremontii / Baccharis emoryi Woodland [Provisional] (Cogan et al. 2004)
- Cogan, D., M. Reid, K. Schulz, and M. Pucherelli. 2004. Zion National Park, Utah 1999-2003. Vegetation Mapping Project. Technical Memorandum 8260-03-01. Remote Sensing and GIS Group Technical Service Center, Bureau of Reclamation, Denver, CO. Appendix F: Vegetation Association Descriptions for Zion.
- Evens, J. M., K. Sikes, D. Hastings, and J. Ratchford. 2014. Vegetation alliance descriptions for Lake Mead National Recreation Area, Death Valley National Park and Mojave National Preserve. Unpublished report submitted to USDI National Park Service, Mojave Desert Network Inventory and Monitoring Program. California Native Plant Society, Sacramento, CA.
- 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.
- 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.