Name:
A.423
Reference:
EcoArt 2002
Description:
This mixed evergreen-deciduous forest alliance occurs on mountain slopes and plateaus in Utah. Sites occur on moderately steep, mid and lower slopes on all aspects. In the Uinta Mountains it occurs on south slopes. Soils are derived from alluvium and colluvium. Seral forests included in this alliance are composed of mixed coniferous and cold-deciduous trees, codominated by ~Populus tremuloides$ and ~Picea pungens$. Several other species of conifers may be scattered within the stands, including ~Pseudotsuga menziesii, Abies concolor, Pinus flexilis$, and ~Pinus contorta$. Younger stands typically have dense ~Populus tremuloides$ with ~Picea pungens$ mixed in. As stands age, ~Populus tremuloides$ cover is slowly reduced until ~Picea pungens$ becomes dominant. The understory includes shrub and herbaceous layers that are typically sparse. The short-shrub layer is often dominated by ~Juniperus communis$. Other shrubs may include ~Artemisia tridentata, Chrysothamnus viscidiflorus, Mahonia repens, Chrysothamnus viscidiflorus, Ribes inerme$, and ~Symphoricarpos oreophilus$. The relatively sparse herbaceous layer is a mixture of graminoids such as ~Bromus anomalus, Carex geyeri, Carex rossii, Elymus trachycaulus, Poa fendleriana$, and ~Stipa$ spp., and forbs like ~Achillea millefolium, Antennaria microphylla, Fragaria vesca, Galium boreale, Geranium$ spp., ~Lathyrus$ spp., ~Mertensia arizonica, Thalictrum fendleri$, and ~Vicia americana$. The exotic species ~Poa pratensis$ and ~Taraxacum officinale$ are common in livestock-impacted stands. Diagnostic of this alliance in the codominance of ~Picea pungens$ and~Populus tremuloides$ in the mixed canopy
Accession Code:
VB.CC.2087.A423
Plot-observations of this Community Concept:
0
|
