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CEGL003149 Populus tremuloides / Rosa woodsii Riparian Forest

Type Concept Sentence: No Data Available


Common (Translated Scientific) Name: Quaking Aspen / Woods'' Rose Riparian Forest

Colloquial Name: No Data Available

Hierarchy Level:  Association

Type Concept: This quaking aspen forest association is currently only known from Great Sand Dunes National Park and Preserve in Colorado and Yosemite National Park in California, and the following description is based on occurrences there. Additional information will be added as it becomes available. At Great Sand Dunes, this association occurs in valley floors, drainage channels, colluvial slopes, and stream terraces. Terrain is variable, ranging from low to steep west-facing slopes with elevation ranging from 2595 to 3265 m. Surveyed stands can be intermittently flooded with loam or sandy loam soils. Ground cover is dominated by litter and duff, but there can be a significant amounts of wood (4-15%) present. Stands of this forest at Yosemite are found between 2040 and 2315 m (6700-7600 feet) of elevation. Aspects are east, and stands prefer gentle to moderate lower slopes, streamsides, and basins, which are seasonally saturated or flooded. Soils vary from loamy sands to clay.

At Great Sand Dunes, this forested association is dominated by a moderately dense canopy of Populus tremuloides (40-60%), with occasional presence of coniferous species such as Pinus ponderosa, Pseudotsuga menziesii, Pinus flexilis, Pinus aristata, and Picea engelmannii. Juniperus scopulorum is frequently present as a tall shrub. The short-shrub layer is generally dominated by Rosa woodsii but may also include Ericameria nauseosa, Ribes inerme, Symphoricarpos rotundifolius, and other species. Herbaceous cover is variable, ranging from 1-55%. No species are constant across all sampled stands, but common components include the graminoids Bromus ciliatus, Calamagrostis canadensis, and Poa spp., and forbs such as Artemisia spp., Carex siccata, Chamerion angustifolium, Equisetum arvense, Maianthemum stellatum, Oreochrysum parryi, and Thalictrum fendleri. At Yosemite, this association forms an open to closed canopy of Populus tremuloides between 5-30 m in height. Rosa woodsii provides the most cover in the shrub layer, though Artemisia tridentata has the highest frequency. Salix exigua is also common in the shrub layer. The herbaceous layer is quite diverse and can be rather dense. Maianthemum stellatum is the most frequent forb. Other common herbaceous associates may include Equisetum arvense, Achillea millefolium, Aquilegia formosa, and/or Iris missouriensis. Many graminoids can be present in this vegetation type, often achieving more than 25% cover. The most common graminoid species include Poa pratensis (exotic), Leymus cinereus, Leymus triticoides, and/or Carex pellita.

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: At Great Sand Dunes, this forested association is dominated by a moderately dense canopy of Populus tremuloides (40-60%), with occasional presence of coniferous species such as Pinus ponderosa, Pseudotsuga menziesii, Pinus flexilis, Pinus aristata, and Picea engelmannii. Juniperus scopulorum is frequently present as a tall shrub. The short-shrub layer is generally dominated by Rosa woodsii but may also include Ericameria nauseosa, Ribes inerme, Symphoricarpos rotundifolius, and other species. Herbaceous cover is variable, ranging from 1-55%. No species are constant across all sampled stands, but common components include the graminoids Bromus ciliatus, Calamagrostis canadensis, and Poa spp., and forbs such as Artemisia spp., Carex siccata (= Carex foenea var. foenea), Chamerion angustifolium, Equisetum arvense, Maianthemum stellatum, Oreochrysum parryi, and Thalictrum fendleri. At Yosemite, this association forms an open to closed canopy of Populus tremuloides between 5-30 m in height. Rosa woodsii provides the most cover in the shrub layer, though Artemisia tridentata has the highest frequency. Salix exigua is also common in the shrub layer. The herbaceous layer is quite diverse and can be rather dense. Maianthemum stellatum is the most frequent forb. Other common herbaceous associates may include Equisetum arvense, Achillea millefolium, Aquilegia formosa, and/or Iris missouriensis. Many graminoids can be present in this vegetation type, often achieving more than 25% cover. The most common graminoid species include Poa pratensis (exotic), Leymus cinereus, Leymus triticoides, and/or Carex pellita.

Dynamics:  No Data Available

Environmental Description:  At Great Sand Dunes, this association occurs in valley floors, drainage channels, colluvial slopes, and stream terraces. Terrain is variable, ranging from low to steep west-facing slopes with elevation ranging from 2595 to 3265 m. Surveyed stands can be intermittently flooded with loam or sandy loam soils. Ground cover is dominated by litter and duff, but there can be a significant amounts of wood (4-15%) present. Stands of this forest at Yosemite are found between 2040 and 2315 m (6700-7600 feet) of elevation. Aspects are east, and stands prefer gentle to moderate lower slopes, streamsides, and basins, which are seasonally saturated or flooded. Soils vary from loamy sands to clay.

Geographic Range: This forest association is currently only known from Great Sand Dunes National Park and Preserve in Colorado and Yosemite National Park in California. Additional range information will be added as it becomes available.

Nations: US

States/Provinces:  CA, CO, NV




Confidence Level: Low

Confidence Level Comments: No Data Available

Grank: GNR

Greasons: No Data Available


Concept Lineage: No Data Available

Predecessors: No Data Available

Obsolete Names: No Data Available

Obsolete Parents: No Data Available

Synonomy: = Populus tremuloides / Rosa woodsii (Sawyer et al. 2009) [61.111.10]
= Populus tremuloides / Rosa woodsii Forest (Keeler-Wolf 2002)
= Populus tremuloides/Rosa woodsii Forest [Provisional] (Keeler-Wolf et al. 2012)

Concept Author(s): T. Keeler-Wolf (2002)

Author of Description: T. Keeler-Wolf and K.E. Sabo

Acknowledgements: No Data Available

Version Date: 05-07-10

  • Cogan, D., J. E. Taylor, and K. Schulz. 2012. Vegetation inventory project: Great Basin National Park. Natural Resource Report NPS/MOJN/NRR--2012/568. National Park Service, Fort Collins, CO. 373 pp.
  • Keeler-Wolf, T. 2002. Classification of the vegetation of Yosemite National Park and surrounding environs in Tuolumne, Mariposa, Madera and Mono counties, California. NatureServe in cooperation with the California Native Plant Society and California Natural Heritage Program, Wildlife and Habitat Data Analysis Branch, California Department of Fish and Game, Sacramento, CA. August 2002.
  • Keeler-Wolf, T., M. Schindel, S. San, P. Moore, and D. Hickson. 2003a. Classification of the vegetation of Yosemite National Park and surrounding environs in Tuolumne, Mariposa, Madera and Mono counties, California. Unpublished report by NatureServe in cooperation with the California Native Plant Society and California Department of Fish and Game, Wildlife and Habitat Data Analysis Branch, Sacramento, CA.
  • Keeler-Wolf, T., P. E. Moore, E. T. Reyes, J. M. Menke, D. N. Johnson, and D. L. Karavidas. 2012. Yosemite National Park vegetation classification and mapping project report. Natural Resource Technical Report NPS/YOSE/NRTR--2012/598. National Park Service, Fort Collins, CO.
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  • Sawyer, J. O., T. Keeler-Wolf, and J. Evens. 2009. A manual of California vegetation. Second edition. California Native Plant Society, Sacramento CA. 1300 pp.
  • Schulz, K. A., and M. E. Hall. 2011. Vegetation inventory project: Great Basin National Park. Unpublished report submitted to USDI National Park Service, Mojave Desert Inventory and Monitoring Network. NatureServe, Western Regional Office, Boulder, CO. 30 pp. plus Appendices A-H.
  • Western Ecology Working Group of NatureServe. No date. International Ecological Classification Standard: International Vegetation Classification. Terrestrial Vegetation. NatureServe, Boulder, CO.
  • Wexelman, D., D. Zemudio, and T. Zemudio. 1999. Ecological riparian systems of the eastern slope of the Sierra Nevada Toiyabe National Forest. USDA Forest Service, Intermountain Region.