Index Catalog // ScholarsArchive@OSU

Creator:: Harrington, Timothy B. (Timothy Brian)
Abstract:: Effects of tanoak (Lithocarpus densiflorus) on early growth, morphology, and physiology of Douglas-fir (Pseudotsuga menziesii) were studied to determine developmental characteristics of young stands and mechanisms of competition. Growth, leaf area, and biomass of Douglas-fir, tanoak, and shrubs / herbs were monitored for six years after establishing a gradient of...
Resource Type:: Dissertation

Creator:: Ketchum, J. Scott
Abstract:: Douglas-fir and grand fir seedling establishment and plant community regeneration were examined in a western Oregon forest following harvest in three different silvicultural systems: clearcut, two-story and patchcut. The two-story system consisted of removing all but 10 to 12 trees per acre. The patchcut system consisted of harvesting 1/2 acre...
Resource Type:: Masters Thesis

Creator:: Poage, Nathan Jeremy
Abstract:: The tree species and size structure of 9l old-growth forests dominated by Douglas-fir in central western Oregon was characterized using complete inventories of all trees larger than 20cm dbh over a mean area of 17.1ha at each site. Douglas-fir accounted for over 75% of the total average basal area (39.1...
Resource Type:: Dissertation

Creator:: Haeussler, Sybille
Abstract:: The role of disturbance in seed germination and first-year survival of red alder (Alnus rubra) was studied over two growing seasons at four sites representing a climatic gradient within the central Coast Range of Oregon. Disturbance affected red alder seed germination and seedling establishment by altering the temperature and moisture...
Resource Type:: Masters Thesis

Creator:: Dowling, Christopher D.
Abstract:: Ages, diameter growth, density, tree size, and species were studied in old-growth, plantation, and young natural Douglas-fir stands in three areas in western Oregon: the western and eastern Coast Range and the western Cascades. The purpose was to compare the development of these three stand types and to determine whether...
Resource Type:: Masters Thesis

Creator:: O'Dea, Mary E.
Abstract:: Natural Douglas-fir stand development is the result of many types of disturbance, both natural and management induced. The magnitude and timing of these disturbances have profound effects on the structure and composition of both the overstory and understory plant communities. Vine maple responds to disturbance by basal sprouting, layering, producing...
Resource Type:: Masters Thesis

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