Print Report
CEGL005326 Juglans major - Prosopis velutina Flooded Forest
Type Concept Sentence: No Data Available
Common (Translated Scientific) Name: Arizona Walnut - Velvet Mesquite Flooded Forest
Colloquial Name: No Data Available
Hierarchy Level: Association
Type Concept: This riparian tall shrubland/woodland occurs in southern Arizona and likely northern Mexico at elevations below 1200 m (3930 feet). Stands are found on gentle slopes along drainages and in floodplains on valley floors. The vegetation is characterized by a moderately dense to dense tall-shrub/tree canopy codominated by Juglans major and Prosopis velutina. Other tree species such as Celtis laevigata var. reticulata may be present but do not codominate. Vines such as Vitis arizonica may have significant cover. Scattered shrubs such as Baccharis spp. and Hymenoclea monogyra may be present, but generally at low cover, and may or may not be dense enough to form strata. The herbaceous layer is generally sparse because of the dense tree canopy and is usually dominated by a mixture of grasses and forbs. The native annual forb Amaranthus palmeri may be present but does not codominate the herbaceous layer. Other herbaceous species reported include Bidens leptocephala and Boerhavia coccinea. If present, cover of Eragrostis lehmanniana is relatively low with less than 25% cover and less than one-third total perennial graminoid cover.
Diagnostic Characteristics: No Data Available
Rationale for Nominal Species or Physiognomic Features: No Data Available
Classification Comments: This riparian tall shrubland/woodland is codominated by Juglans major and Prosopis velutina. It was placed in ~Juglans major - Juglans microcarpa Riparian Forest Alliance (A0957)$$ as a best fit despite its being a shrubland/woodland. There is also a USNVC placeholder, ~Juglans major Flooded Forest (CEGL001102)$$, that is similar; this stand could be classified to it except for the codominance of Prosopis velutina, which is distinctive enough to propose a new association. This is based on one transect and several observations along Arivaca Creek at Buenos Aires National Wildlife Refuge. More survey and classification work are needed to fully characterize this association.
Similar NVC Types: No Data Available
note: No Data Available
Physiognomy and Structure: No Data Available
Floristics: The vegetation is characterized by a moderately dense to dense tall-shrub/tree canopy codominated by Juglans major and Prosopis velutina. Other tree species such as Celtis laevigata var. reticulata (= Celtis reticulata) may be present but do not codominate. Vines such as Vitis arizonica may have significant cover. Scattered shrubs such as Baccharis spp. and Hymenoclea monogyra may be present, but generally at low cover, and may or may not be dense enough to form strata. The herbaceous layer is generally sparse because of the dense tree canopy and is usually dominated by a mixture of grasses and forbs. The native annual forb Amaranthus palmeri may be present but does not codominate the herbaceous layer. Other herbaceous species reported include Bidens leptocephala and Boerhavia coccinea. If present, cover of Eragrostis lehmanniana is relatively low with less than 25% cover and less than one-third total perennial graminoid cover.
Dynamics: No Data Available
Environmental Description: This riparian tall shrubland/woodland occurs in southern Arizona and likely northern Mexico at elevations below 1200 m (3930 feet). Stands are found on gentle slopes along drainages and in floodplains on valley floors.
Geographic Range: This riparian tall shrubland/woodland is found in southern Arizona and likely northern Mexico.
Nations: MX?,US
States/Provinces: AZ, MXSON?
Plot Analysis Summary:
http://vegbank.org/natureserve/ELEMENT_GLOBAL.2.803018
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 | A0957 Arizona Walnut - Little Walnut Riparian Forest Alliance | A0957 | 1.B.3.Nd.2.b |
| Association | CEGL005326 Arizona Walnut - Velvet Mesquite Flooded Forest | CEGL005326 | 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: = Juglans major - Prosopis velutina Forest (Schulz 2004)
- Schulz, K. A. 2004. Vegetation classification of Buenos Aires National Wildlife Refuge, Arizona. Unpublished report submitted to USDI Fish and Wildlife Service. NatureServe, Western Regional Office, Boulder, CO.
- Western Ecology Working Group of NatureServe. No date. International Ecological Classification Standard: International Vegetation Classification. Terrestrial Vegetation. NatureServe, Boulder, CO.