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CEGL000938 Populus angustifolia / Alnus oblongifolia Riparian Woodland
Type Concept Sentence: No Data Available
Common (Translated Scientific) Name: Narrowleaf Cottonwood / Arizona Alder Riparian Woodland
Colloquial Name: No Data Available
Hierarchy Level: Association
Type Concept: This community type occurs at elevations ranging between 1840 and 2120 m (6050-6950 feet) in narrow ravines or canyons in the Rio Grande and Gila River basins in southwestern and central New Mexico and adjacent Arizona. Limited data suggest that this type may be found along alluvial bars and along streambanks in positions above bankfull stream levels (discharge ratios range from 1.0 to 13.3). Streams have moderate to high gradients (1.0-4.5%), beds that are gravelly/cobbly, and flows that can be either perennial or intermittent. Flooding is estimated to recur anywhere from 2 to 25 years. Soils are poorly developed, well-drained, sandy and rocky. They can be somewhat wet within rooting depths during high flow periods (Oxyaquic Ustifluvents and Torrifluvents). Canopies are dense (>60% cover) and codominated by Populus angustifolia and Alnus oblongifolia. When cottonwoods are few in number, these trees are usually larger and more mature than the alders. Both species show good reproduction as saplings and seedlings. Young Acer negundo saplings are also common beneath the tree canopy and occasionally extend into the canopy. Salix gooddingii, Acer negundo, Juglans major, Juniperus deppeana, Juniperus monosperma, and Juniperus scopulorum are also possible in the understory. Brickellia californica can be common to abundant in the shrub layer and may be indicative for this type. The herbaceous layer is characteristically grassy and moderately diverse (44 herb species recorded for the type). Poa pratensis is the most common grass, sometimes codominating with Bouteloua curtipendula and Bouteloua gracilis. Thirteen wetland indicators have been recorded for the type, including Glyceria striata, Equisetum arvense, Mimulus guttatus, Rumex crispus, Veronica americana, Rudbeckia laciniata, Oxypolis fendleri, and Cicuta douglasii.
Diagnostic Characteristics: No Data Available
Rationale for Nominal Species or Physiognomic Features: No Data Available
Classification Comments: No Data Available
Similar NVC Types: No Data Available
note: No Data Available
Physiognomy and Structure: No Data Available
Floristics: Canopies are dense (>60% cover) and codominated by Populus angustifolia and Alnus oblongifolia. When cottonwoods are few in number, these trees are usually larger and more mature than the alders. Both species show good reproduction as saplings and seedlings. Young Acer negundo saplings are also common beneath the tree canopy and occasionally extend into the canopy. Salix gooddingii, Acer negundo, Juglans major, Juniperus deppeana, Juniperus monosperma, and Juniperus scopulorum are also possible in the understory. Brickellia californica can be common to abundant in the shrub layer and may be indicative for this type. The herbaceous layer is characteristically grassy and moderately diverse (44 herb species recorded for the type). Poa pratensis is the most common grass, sometimes codominating with Bouteloua curtipendula and Bouteloua gracilis. Thirteen wetland indicators have been recorded for the type, including Glyceria striata, Equisetum arvense, Mimulus guttatus, Rumex crispus, Veronica americana, Rudbeckia laciniata, Oxypolis fendleri, and Cicuta douglasii.
Dynamics: No Data Available
Environmental Description: This community type occurs at elevations ranging between 1840 and 2120 m (6050-6950 feet) in narrow ravines or canyons in the Rio Grande and Gila River basins in southwestern and central New Mexico and adjacent Arizona. Limited data suggest that this type may be found along alluvial bars and along streambanks in positions above bankfull stream levels (discharge ratios range from 1.0 to 13.3). Streams have moderate to high gradients (1.0-4.5%), beds that are gravelly/cobbly, and flows that can be either perennial or intermittent. Flooding is estimated to recur anywhere from 2 to 25 years. Soils are poorly developed, well-drained, sandy and rocky. They can be somewhat wet within rooting depths during high flow periods (Oxyaquic Ustifluvents and Torrifluvents).
Geographic Range: This association is found in the Rio Grande and Gila River basins in southwestern and central New Mexico and adjacent Arizona.
Nations: US
States/Provinces: AZ, NM
Plot Analysis Summary:
http://vegbank.org/natureserve/ELEMENT_GLOBAL.2.687460
Confidence Level: Moderate
Confidence Level Comments: No Data Available
Grank: G4
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 | A3759 Narrowleaf Cottonwood Riparian Forest Alliance | A3759 | 1.B.3.Nc.1.a |
| Association | CEGL000938 Narrowleaf Cottonwood / Arizona Alder Riparian Woodland | CEGL000938 | 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: = Narrowleaf Cottonwood-Arizona Alder CT (Muldavin et al. 2000a)
- Bassett, D., M. Larson, and W. Moir. 1987. Forest and woodland habitat types of Arizona south of the Mogollon Rim and southwestern New Mexico. Edition 2. USDA Forest Service, Southwestern Region, Albuquerque, NM.
- Boles, P. H., and W. A. Dick-Peddie. 1983. Woody riparian vegetation patterns on a segment of the Mimbres River in southwestern New Mexico. Southwestern Naturalist 28:81-87.
- Bourgeron, P. S., and L. D. Engelking, editors. 1994. A preliminary vegetation classification of the western United States. Unpublished report. The Nature Conservancy, Western Heritage Task Force, Boulder, CO. 175 pp. plus appendix.
- Laurenzi, A. W., R. D. Ohmart, and N. C. Hink. 1983. Classification of mixed broadleaf riparian forests in Tonto National Forest. Pages 72-81 in: Proceedings of the workshop on Southwestern habitat types. USDA Forest Service, Southwestern Region.
- 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.
- Western Ecology Working Group of NatureServe. No date. International Ecological Classification Standard: International Vegetation Classification. Terrestrial Vegetation. NatureServe, Boulder, CO.