. Aspen community types of Utah. Forest ecology Utah; Aspen; Plant communities Utah. habitat. Early successional stages are of intermediate value to wildlife. This value decreases as succession pro- ceeds to conifer dominance. Although not identified by the same name, communi- ties similar to this serai type can also be found in Idaho and adjacent Wyoming. Some of the stands used to describe the P. tremuloides-A. lasiocarpa/Thalictrum fendleri type in southeastern Idaho (Mueggler and Campbell 1982) resemble those in our Utah type, except for fewer tall forbs. In Utah, the type is regarded as a
. Aspen community types of Utah. Forest ecology Utah; Aspen; Plant communities Utah. habitat. Early successional stages are of intermediate value to wildlife. This value decreases as succession pro- ceeds to conifer dominance. Although not identified by the same name, communi- ties similar to this serai type can also be found in Idaho and adjacent Wyoming. Some of the stands used to describe the P. tremuloides-A. lasiocarpa/Thalictrum fendleri type in southeastern Idaho (Mueggler and Campbell 1982) resemble those in our Utah type, except for fewer tall forbs. In Utah, the type is regarded as a successional stage within the A. lasiocarpa/Osmorhiza chilensis habitat type. Steele and others (1983) show P. tremuloides as a major serai tree in this habitat type in eastern Idaho and western Wyoming. Populus tremuloides-Abies lasiocarpa/ Carex geyeri Community Type (POTR-ABLA/CAGE c,t.) This community tv'pe is fairly common on the high plateaus and mountains of central and southern Utah, although it is found occasionally in northern Utah, prin- cipally in the Uinta Mountains. It is a relatively high elevation type. Over 80 percent of the 77 stands sampled were at elevations over 9,000 ft (2 740 m). These stands most frequently occupied rather gentle slopes, and exposures of the slopes did not appear important. Over three-fourths of the stands occurred on soils derived from either volcanic or granitic parent material. The conspicuous presence of Abies lasiocarpa in the tree stratum clearly reflects this type's successional sta- tus. Picea engelmannii is also frequently present in the tree layer. The undergrowth is chairacterized by the absence of a distinct shrub layer and the lack of minimal representation by the tall forb and tall grass group of species. The shrubs Juniperus communis, Berberis repens, and Symphoricarpos oreophilus occasionally may be present but are never abundant. Consequently the undergrowth consists primarily of low herbaceous growth. This usually is c
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