Ten individuals from each of four tree species were selected, and their associated understory and adjacent open-area communities were sampled for both environmental and vegetational parameters, including light intensity, pH, litter depth, soil depth, and percentages of exposed rock, litter cover, living cover, shrubs, forbs, grasses, and annuals. The four tree species were ponderosa pine, Rocky Mountain juniper, Gambel oak, and snowbrush ceanothus. The study site was in the lower Uinta Mountains about 10 miles east of Kamas, Utah. Correlations among the various biotic and abiotic parameters were examined. The interplay of these factors in differentiating the understory and open-area communities is discussed.
Evenson, William E.; Brotherson, Jack D.; and Wilcox, Richard B.
"Relationship between environmental and vegetational parameters for understory and open-area communities,"
Great Basin Naturalist: Vol. 40
, Article 14.
Available at: http://scholarsarchive.byu.edu/gbn/vol40/iss2/14