Index Catalog // ScholarsArchive@OSU

Growth and carbon allocation of red alder seedlings grown over a density gradient

Creator:: Giordano, Peter A.
Abstract:: The amount and quality of competition among individuals in developing plant communities is an important factor determining community structure, composition and development. In perennial plant communities, this competition is reflected by shifts in carbon allocation among plant parts and can result in long-term structural differences between neighboring individuals. This study...
Resource Type:: Masters Thesis

Understory competition for resources in Pinus ponderosa forests of northeastern Oregon

Creator:: Riegel, Gregg M.
Abstract:: The objective of this research was to determine which environmental resources, light, water, and nutrients, control understory plant production and composition in a Pinus ponderosa forest in northeastern Oregon. A split-plot experimental design, with three blocks, four treatments, and 44 plots, was established in the summer of 1985. Twenty plots...
Resource Type:: Dissertation
Full Text:: plant succession as the tree canopy increases. The objectives of this research were to: 1) test the

Response of Artemisia tridentata ssp. wyomingensis and Stipa thurberiana to nitrogen amendments

Creator:: Wang, Chien-kuo
Abstract:: The effect of nitrogen on influencing the competitive balance between a shrub, Artemisia tridentata ssp. wyolningensis (ARTRW) and a perennial grass Stipa thurberiana (STTH) in a sagebrush steppe community was determined. Nitrogen levels were altered on 5x5 in plots by applying 4.5 gun2 of nitrogen in the form of ammonium...
Resource Type:: Masters Thesis

Competitive effects of overtopping vegetation on Douglas-fir morphology in the Oregon Coast Range

Creator:: Chan, Samuel S.
Abstract:: The response of Douglas-fir (Pseudotsuga menziesii [Mirb.] Franco) saplings to various levels of brush overtopping when growing on three north-facing sites in the Oregon Coast Range was investigated for two consecutive years. A fisheye (hemispherical) photographic technique combined with a digitizing computer system was used to determine the percentage of...
Resource Type:: Masters Thesis

Survival and growth of Douglas-fir and ponderosa pine during eight years of whiteleaf manzanita and herb competition in southwest Oregon

Creator:: Funez, Atilio Ortiz
Abstract:: This thesis examines the 8-year growth trend of Douglas-fir (Pseudotsuga menziesii (mirb.)Franco), ponderosa pine (Pinus ponderosa Dougl. ex laws.), and whiteleaf manzanita (Arctostaphylos viscida Parry). Manzanita stands ranging from 1700/ha to 27000/ha density were grown among mixed conifers of the same age, which were planted in 1981 at 250x250 cm...
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

Interspecific competition in young Douglas-fir plantations of the Oregon coast range

Creator:: Wagner, Robert Gordon
Abstract:: Improving vegetation management decisions in Pacific Northwest forests requires a better understanding of the interactions between planted conifers and associated vegetation. A practical index of interspecific competition, and quantitative models predicting conifer performance from such an index are particularly needed. To meet this need, neighborhood models of interspecific competition were...
Resource Type:: Dissertation

Early competitive interactions between red alder and salmonberry in the Oregon Coast Range

Creator:: Kelly, Linda Susan
Abstract:: General outcomes of this study show that early growth of planted red alder is often slowed in the presence of neighboring vegetation, and overwhelmingly by salmonberry, a common associate in disturbed Oregon Coast Range habitats. Additionally, young red alder plantations located in riparian areas may be highly susceptible to frost...
Resource Type:: Masters Thesis

Effect of western juniper removal on ponderosa pine and associated understory vegetation

Creator:: Rose, Jeffrey A.
Abstract:: This research assessed the effect of western juniper (Junlperus occldentalls) removal on understory plant production and cover and ponderosa pine (Pinus ponderosa) growth and plant water status. A complete randomized block design, with four blocks and four treatments was established in the summer of 1984 near Prineville, Oregon. The four...
Resource Type:: Masters Thesis
Full Text:: effect of removing western juniper on herbaceous plant production under the canopy and in the interspace

Animal damage, vegetative competition and growth of western hemlock seedlings in the Coast Range of Oregon

Creator:: Hyatt, Joan Marie
Abstract:: The growth of western hemlock during the first four years of seedling establishment was examined in a competitive environment in which seedlings were exposed to various types of animal damage and salmonberry and/or alder competition. The study utilized an existing Nelder/replacement series experiment which focused on the competitive effects among...
Resource Type:: Masters Thesis

ScholarsArchive@OSU

Growth and carbon allocation of red alder seedlings grown over a density gradient

Understory competition for resources in Pinus ponderosa forests of northeastern Oregon

Response of Artemisia tridentata ssp. wyomingensis and Stipa thurberiana to nitrogen amendments

Competitive effects of overtopping vegetation on Douglas-fir morphology in the Oregon Coast Range

Survival and growth of Douglas-fir and ponderosa pine during eight years of whiteleaf manzanita and herb competition in southwest Oregon

Growth of plantation conifers and whiteleaf manzanita in southwest Oregon

Interspecific competition in young Douglas-fir plantations of the Oregon coast range

Early competitive interactions between red alder and salmonberry in the Oregon Coast Range

Effect of western juniper removal on ponderosa pine and associated understory vegetation

Animal damage, vegetative competition and growth of western hemlock seedlings in the Coast Range of Oregon

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