. Regeneration in mixed conifer partial cuttings in the Blue Mountains of Oregon and Washington. Study Areas Study areas (plots) were located in forests at midelevations of the Blue Mountains of northeastern Oregon and of southeastern Washington in the Umatilla and Wallowa- Whitman National Forests (fig. 1). Hall (1973) identified forest communities that occur in the study area or are similar. Identification of these plant communities is based on the dominant tree overstory and on shrubs, forbs, and grasses in the understory. Plots were located in two of these plant communities: (1) the mixed
. Regeneration in mixed conifer partial cuttings in the Blue Mountains of Oregon and Washington. Study Areas Study areas (plots) were located in forests at midelevations of the Blue Mountains of northeastern Oregon and of southeastern Washington in the Umatilla and Wallowa- Whitman National Forests (fig. 1). Hall (1973) identified forest communities that occur in the study area or are similar. Identification of these plant communities is based on the dominant tree overstory and on shrubs, forbs, and grasses in the understory. Plots were located in two of these plant communities: (1) the mixed conifer/pinegrass community and (2) the grand fir/big huckleberry community. Being relatively stable, these plant com- munities can be placed within the habitat type classification, which stratifies envi- ronment by focusing on potential climax species. The mixed conifer/pinegrass community relates to at least three habitat types described for Idaho forest land: Douglas-fir/pinegrass (Daubenmire and Daubenmire 1968, Steele and others 1981), grand fir/pinegrass, and grand fir/white spirea (Steele and others 1981). Similarly, part of the grand fir/big huckleberry community type occurs on grand fir/blue huckleberry habitat types (Steele and others 1981). The major tree species found in the mixed conifer/pinegrass community are pon- derosa pine and Douglas-fir as serai species and grand fir as the climax species. In the grand fir/big huckleberry community, grand fir is the major tree species. If the site is moist enough, quantities of Engelmann spruce are present. Serai trees are ponderosa pine, Douglas-fir, and—depending on prior fire conditions—western larch and lodge- pole Wheeler. Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original Seidel, Kenneth W. cn; Head, S. Conrade. cn; Pacific Northwest Forest
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