Index Catalog // ScholarsArchive@OSU

Conifer regeneration, understory vegetation and artificially topped conifer responses to alternative silvicultural treatments

Creator:: Huff, Tristan
Abstract:: Historically, between 40-60% of the Coast Range of Oregon was comprised of structurally diverse, old forests initiated by disturbances of various spatial scales ranging from thousands of acres (large fires) to the size of a single tree (windthrow). The predominant regeneration method of the past several decades, however, has been...
Resource Type:: Masters Thesis
Full Text:: regime had no effect on either total plant cover or tall shrub cover. More disturbed areas had greater

Understory vegetation effects on soil nitrogen and soil carbon in thinned and unthinned Douglas-fir forests

Creator:: Geyer, Eric A.
Abstract:: The optimum goal of forest management is to foster long-term productivity and ecological integrity while maintaining or increasing short-term growth and yield through sustainable practices. Understory vegetation plays a definite role in forest functions through nutrient cycling and habitat provisions. The objective of this study was to determine how salal,...
Resource Type:: Masters Thesis
Full Text:: eliminate non-plant variability in soil nitrogen and carbon, sites were selected based on similar

Nutrient and tannin concentrations of shrub leaves in managed and unmanaged forests of the Oregon Coast Range : implications for herbivores

Creator:: Lange, Karen M.
Abstract:: Many herbivores of the Pacific Northwest rely on forest understory shrub leaves for a source of nitrogen, energy, and moisture. I measured nitrogen, protein-binding capacity, and condensed tannin concentration as indicators of available nitrogen; cell wall constituents and lignin as indicators of available energy; and moisture concentration in young and...
Resource Type:: Masters Thesis

Growth of plantation conifers and whiteleaf manzanita in southwest Oregon

Creator:: Hanson, Thomas J. (Thomas Jeffrey)
Abstract:: Southwest Oregon presents an environment of hot dry summers, cool moist winters, and rocky, shallow soils. The establishment of conifer plantations in this region presents challenging problems for initial seedling survival and subsequent growth. Three areas of concern include early conifer growth after seedling establishment, growth of competing hardwoods within...
Resource Type:: Dissertation

Similarities in understory vegetation composition between unthinned, thinned and old-growth Douglas fir stands in western Oregon

Creator:: Mayrsohn, Cheryl
Abstract:: Forest stands were studied to determine if old-growth forest structure could be mimicked in younger stands via overstory manipulation. Cover and species composition of understory plants were systematically sampled in sixteen thinned second-growth stands and sixteen adjacent unthinned second-growth Douglas fir (Pseudotsuga menziesii (Mirabel) Franco.) stands. The stands were thinned...
Resource Type:: Masters Thesis
Full Text:: layers and climate were major determining factors in the species composition of the understory plant

The influence of antidesiccants on field performance and physiology of 2+0 ponderosa pine (Pinus ponderosa Dougl.) seedlings

Creator:: Vera-Castillo, J. A. Gil
Abstract:: This thesis research examines the effects of film-forming antidesiccants applied to dormant pondexosa pine (Pinus ponderosa Dougl.) seedlings after being lifted and to actively growing seedlings. The basic proposition was that antidesiccants would have a positive effect on reducing water loss in ponderosa pine seedlings. In order to evaluate the...
Resource Type:: Dissertation

The effect of riparian buffer strips on salmonberry (Rubus spectabilis) community structure in alder stands of the Oregon Coast Range

Creator:: Froyd, Cynthia A.
Abstract:: Salmonberry community structure was examined in alder-dominated riparian buffer strips in the Oregon Coast Range. Salmonberry growing on slopes was found to respond differently, to both characteristics of the buffer strips and to environmental factors, than salmonberry growing on terraces. Salmonberry, as measured by total height, number of ramets or...
Resource Type:: Masters Thesis

A plant association classification for McDonald-Dunn Forest

Creator:: Hubbard, Connie J.
Abstract:: The purpose of this study was to develop a plant association classification for the mature coniferous forests of the McDonald and Paul M. Dunn Research Forests. A secondary objective was to quantify diversity within the plant associations. This Forest is approximately 11,000 acres and is located 6 miles to the...
Resource Type:: Masters Thesis

Influence of cattle grazing and forage seeding on establishment of conifers in southwest Oregon

Creator:: Alejandro-Castro, Mabel
Abstract:: The ability of controlled livestock grazing, in combination with seeding of palatable forages, to reduce understory competition and enhance conifer establishment, was evaluated during 1985 and 1986, on two adjacent sites in southwestern Oregon. In 1984, Site 1 was clearcut and broadcast burned to remove slash, and Site 2 was...
Resource Type:: Masters Thesis
Full Text:: Plant Cover 93 Standing Crop 98 Discussion 100 Conclusion 105 Literature Cited 107 BIBLIOGRAPHY 110

Fifth-year growth responses of Douglas-fir to crowding and other competition

Creator:: Cole, Elizabeth C.
Abstract:: This thesis examines the competitive aspects of Douglas-fir trees growing with two commonly associated competitors--red alder and grass--at varying densities. Two Nelder plots in three different environments in the Oregon Coast Range were studied. The sites represented the warm, dry climate of the Willamette Valley; the warm, moist climate of...
Resource Type:: Masters Thesis

ScholarsArchive@OSU

Conifer regeneration, understory vegetation and artificially topped conifer responses to alternative silvicultural treatments

Understory vegetation effects on soil nitrogen and soil carbon in thinned and unthinned Douglas-fir forests

Nutrient and tannin concentrations of shrub leaves in managed and unmanaged forests of the Oregon Coast Range : implications for herbivores

Growth of plantation conifers and whiteleaf manzanita in southwest Oregon

Similarities in understory vegetation composition between unthinned, thinned and old-growth Douglas fir stands in western Oregon

The influence of antidesiccants on field performance and physiology of 2+0 ponderosa pine (Pinus ponderosa Dougl.) seedlings

The effect of riparian buffer strips on salmonberry (Rubus spectabilis) community structure in alder stands of the Oregon Coast Range

A plant association classification for McDonald-Dunn Forest

Influence of cattle grazing and forage seeding on establishment of conifers in southwest Oregon

Fifth-year growth responses of Douglas-fir to crowding and other competition

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